Moxa Technologies Surge Protector A51 User Manual

A50/A51/A60  
Feb. 1997 ( 1st Edition )  
All Rights Reserved  
 
Part II - A60 RS-232 Surge Protection  
A60  
RS-232 Surge Protection  
Converter  
 
Copyright Notice  
This documentation is copyrighted by Moxa Technologies Co., Ltd.  
All rights are reserved. Moxa Technologies reserves the right to  
make improvements to the products described in this manual at any  
time without notice.  
Information provided in this manual is intended to be accurate and  
reliable. However, Moxa Technologies assumes no responsibility for  
its use, nor for any infringements of rights of the fourth party which  
may result from its use.  
MOXA is a registered trademark of Moxa Technologies Co., Ltd.  
The other trademarks in this manual belong to their manufacturers  
individually.  
Moxa Technologies Co., Ltd.  
Tel:  
+866-2-8665-6373  
+886-2-8665-6372  
Fax:  
 
Moxa Internet Services  
Customer’s satisfaction is always our number one concern. To  
ensure customers get the full benefit of our services, Moxa Internet  
Services (MIS) have been built for technical support, product inquiry,  
new driver upgrade, etc.  
The followings are the services we provide.  
E-mail for technical support  
address  
:
Ftp site for free driver upgrade  
address  
user ID  
:
:
ftp.moxa.com or ftp.moxa.com.tw  
ftp  
password : your_email_address  
World Wide Web (WWW) for product info.  
address  
:
 
Table of Contents  
Part I - A50/A51 RS-232 to RS-422/RS-485 Converter  
Chapter 1. Introduction ……………………………………….  
1.1 Overview  
1
1
1.2 Features and Specifications  
2
1.3 Package Check List  
5
Chapter 2. Installation ………………………………………..  
2.1 Installation Procedure  
7
7
7
8
9
2.2 Switch Function Description  
2.3 LED Indicators  
2.4 RS-422/RS-485 Pinouts  
Chapter 3. Operation …………………………………………  
11  
12  
14  
17  
19  
3.1 Point-to-point  
3.2 Multidrop  
3.3 Simplex/Transmit, Receive  
3.4 Self Test  
Appendix A RS-232 Pinouts and Cable Wiring ……………….. 21  
Appendix B Impedance Matching and Termination Resistors…… 25  
Appendix C Troubleshooting …………………………………. 27  
 
Table of Contents  
Part II - A60 RS-232 Surge Protection  
Chapter 1. Introduction…………………………………………… 29  
1.1 Overview  
1.2 Features and Specifications  
1.3 Package Check List  
30  
30  
31  
Chapter 2. Installation……………………………………………… 33  
2.1 Installation Procedure  
2.2 LED Indicators  
2.3 Self Test  
33  
34  
36  
Appendix A RS-232 Pinouts and Cable Wiring……………………  
Appendix B Troubleshooting ………………………………………..  
37  
41  
 
 
Chapter1  
Introduction  
1.1 Overview  
The MOXA RS-232 to RS-422/RS-485 bidirectional converters,  
A50 and A51, are designed to convert unbalanced (single-ended)  
RS-232 signals to balanced (differential) RS-422/RS-485  
signals, and vice versa. They are the best choices for those who  
want to control devices at longer distance and/or to  
communicate with several devices via merely one link,  
particularly in the industry area. Point-to-point, multidrop and  
simplex operations are available for most users' needs.  
RS-232toRS-422/485  
RS-422/485  
RJ-45 Connector  
A50  
C
onverter  
Power Jack  
RS-422/485  
RS-232  
RS-232  
RJ-45 Connector  
Outlook of A50  
1
 
Introduction  
Chapter 1  
IsolatedRS-232toRS-422/485  
A51  
RS-422/485  
onverter  
C
A51  
RJ-45 Connector  
Power Jack  
RS-422/485  
RS-232  
RS-232  
RJ-45 Connector  
Outlook of A51  
1.2 Features and Specifications  
Features  
Both A50 and A51 are RS-232 to RS-422/RS-485 bidirectional  
converters except that A51 has one more feature: isolation  
protection, which provides high voltage protection up to 2000V.  
All the switches, SW1 and SW2, of A50/A51 are designed to be  
inside of the converter to protect switch settings from  
unintended change and introducing communication error  
without any warning. Hence, it is necessary to take the two  
screws off and open the cover up if you need to change the  
operation mode via sliding the switches.  
The A50/A51 must be powered either from a DC +9V to +30V,  
2
 
Chapter 1  
Introduction  
150mA power adapter or the pin 6 and pin 7 of the Terminal  
Block.  
LED indicators are provided to show the status of data  
transmitting/receiving, RTS signal and Power.  
To avoid over-current from the remote ground to converter's  
ground, an protect resistor has been added inside the A50/A51.  
Specifications  
v Power Supply - DC +9V to +30V, 150mA  
v Data Rate - Up to 921600 bps under 500 ft (0.15 Km)  
v Distance - Up to 4000 ft (1.2 Km) under 115200 bps  
v RS-232 RJ-45 Connector -  
Supports TxD, RxD, DTR, DSR, RTS, CTS, DCD, GND  
v RS-422/RS-485 RJ-45 Connector -  
Supports TxDA, TxDB, RxDA, RxDB, GND  
v RS-422/RS-485 Terminal Block Connector -  
Supports TxDA, TxDB, RxDA, RxDB, GND, PWR, PWR  
GND  
v Switch - SW1 : for full/half-duplex mode  
SW2 : for Tx (driver) and Rx (receiver) state  
3
 
Introduction  
Chapter 1  
v Isolation Protection - for A51 only, up to 2000V.  
v Terminal Resistor - RT1 space reserved for RS-422/RS-485  
receiver signal.  
v Mounting Kit - Plastic Plates and screws for mounting  
A50/A51 on the wall or any surface.  
RS-232toRS-422/485  
Mounting  
Screw  
A50  
onverter  
C
RS-422/485  
RS-232  
Fixing Screw  
A50/A51 with Mounting Kit  
4
 
Chapter 1  
Introduction  
1.3 Package Check List  
Upon unpacking your A50 or A51 package, you should find the  
following items:  
v A50 (or A51) RS-232 to RS-422/RS-485 bidirectional  
converter (with isolation protection if A51)  
v One power adapter  
v Mounting Kit  
v A50/A51/A60 User's Manual  
5
 
Introduction  
Chapter 1  
6
 
Chapter 2  
Installation  
2.1 Installation Procedure  
As RS-232 or RS-422/RS-485 port are labeled clearly on the  
surface of the A50/A51 converter, please prepare the RS-232  
cable (refer to Appendix A, RS-232 Cable Wiring) and decide  
the operation mode as well as 2/4-wire cable (refer to Chapter 3,  
Operation) in advance.  
Take off the two screws on top of the converter and open the  
cover up if you need to change the operation mode via sliding  
the switches.  
2.2 Switch Function Description  
ON  
ON  
1 2  
1
3
4
SW1  
SW2  
Inside look of A50/A51  
7
 
Chapter 2 l  
l Installation  
Switch settings table of SW1 and SW2 is as follows:  
SW1  
*Full-duplex mode  
Half-duplex mode  
Off  
On  
SW2  
Pin1 Pin2 Pin3 Pin4  
*TxD always enabled On Off X  
TxD always disabled Off Off X  
X
X
X
TxD enabled by RTS Off On  
X
*RxD always enabled  
RxD enabled by /RTS X  
X
X
X
On Off  
Off On  
Note: ‘ * ‘ means default settings , ‘ X ‘ means don’t care  
2.3 LED Indicators  
There are LED indicators for TxD, RxD, RTS, and PWR on top  
of A50/A51. The indicator is not lighted on when not connected  
with signal or power. On the contrary, it will be lighted on and  
be in one of the red, green or orange colors.  
TxD indicator stands for data transmitting from RS-232 to  
RS-422/RS-485. It shows green when connected and no data  
transmitting. It shows orange when connected and transmitting  
data.  
8
 
Installation l  
l Chapter 2  
RxD indicator stands for data transmitting from RS-422/RS-485  
to RS-232. It shows red when connected and no data received. It  
shows orange when connected and receiving data (In half-  
duplex mode, it shows red when line is not connected due to the  
characteristics of ICs for RS-485).  
RTS indicator is for RS-232 RTS signal. It shows red when  
connected and RTS signal turned on. It shows green when  
connected and RTS signal turned off.  
PWR indicator is red when power is on and not lighted when  
power is off or not connected.  
2.4 RS-422/RS-485 Pinouts  
RS-422/RS-485 interface with RJ-45 Jack connector or  
Terminal Block Connector is depicted as follows.  
RJ-45 Connector  
Terminal Block Connector  
1
2
3
4
5
6
7
1 2 3 4 5 6 7 8 9 10  
9
 
Chapter 2 l  
l Installation  
A50/A51  
A50/A51  
RJ-45 Jack  
Terminal Block  
Connector Pinouts Signals  
Connector Pinouts Signals  
1
2
3
4
5
6
7
8
9
nc  
nc  
1
2
3
4
5
6
7
TxD B  
TxD A  
RxD B  
RxD A  
GND  
Power GND  
Power Input  
GND  
TxD B  
TxD A  
RxD A  
RxD B  
GND  
nc  
10  
nc(not connected)  
Note : Pin 6 and Pin 7 of Terminal Block are for Power GND  
and Power Input, which is an alternate option for power  
adapter. Be careful that DO NOT confuse RS-422/RS-  
485 GND with Power GND.  
Note : Under half-duplex mode (SW1 in ON mode), the  
couples of (TxD B, RxD B) and (TxD A, RxD A) are  
shorted inside the converter for convenience. Users can  
save the trouble with shorting the wires.  
10  
 
Chapter 3  
Operation  
The A50 (or A51) supports 5 kinds of operations. They are:  
v Point-to-point/4-wire Full Duplex  
v Point-to-point/2-wire Half Duplex  
v Multidrop/4-wire Full Duplex  
v Multidrop/2-wire Half Duplex  
v Simplex/Transmit, Receive Only  
All the operations are to be described below. And TA, TB, RA  
and RB represent TxD A, TxD B, RxD A and RxD B signal  
lines of the RJ-45 RS-422/RS-485 connector or the Terminal  
Block, respectively.  
Note : If possible, connect GND of both sides together to gain  
better signals. That is, you may need one more GND  
connection in addition to 4-wire or 2-wire connection.  
Note : For A51, connecting GND at the Terminal Block to the  
earth ground to provide a ground path to prevent  
electric shock caused by lightning, no matter RJ-45 or  
Terminal Block RS-422/RS-485 is used.  
~11~  
 
Chapter 3 l  
l Operation  
3.1 Point-to-point  
Point-to-point configuration means two devices which locate at  
two different places can be linked together to communicate  
through a couple of A50 (or A51) converters.  
4-wire Full Duplex  
A50/A51  
A50/A51  
TA  
RS-422/ TB  
RA  
RS-232  
RB RS-422/  
TB RS-485  
TA  
RS-232  
DTE/  
DCE  
DTE/  
DCE  
RS-485  
RB  
RA  
GND  
GND  
In the graph, TA, TB, RA and RB could be either from RJ-45 or  
Terminal Block. The settings of the switches for each A50 (or  
A51) are as follows:  
SW1  
Full-duplex mode Off TxD always enabled On Off X  
RxD always enabled On Off  
SW2  
Pin1 Pin2 Pin3 Pin4  
X
X
X
12  
 
Operation l  
l Chapter 3  
2-wire Half Duplex  
A50/A51  
A50/A51  
RS-485  
TA  
TB  
RA  
RB  
RS-232  
RS-232  
DTE/  
DCE  
DTE/  
DCE  
RB  
TB  
RA  
TA  
GND  
GND  
RS-485  
In the graph, TA, TB, RA and RB could be either from RJ-45 or  
Terminal Block. The settings of the switches for each A50 (or  
A51) are as follows:  
SW1  
Half-duplex mode On TxD enabled by RTS Off On  
RxD enabled by / RTS X  
SW2  
Pin1 Pin2 Pin3 Pin4  
X
X
X
Off On  
13  
 
Chapter 3 l  
l Operation  
3.2 Multidrop  
Multidrop configuration means that more than two devices  
(Max. 10 for RS-422; Max. 32 for RS-485) can be linked all  
together to communicate one another through many A50 (or  
A51) devices. In this configuration, one of the A50 (or A51)  
will be connected to a master device and the rest of A50 (or  
A51) devices will be connected to any other slave devices.  
4-wire Full Duplex  
A50/A51  
A50/A51  
TA  
TB  
RA  
RB  
Master  
DTE/  
DCE  
Slave  
DTE/  
DCE  
RS-232  
RS-485  
RS-485 RS-232  
RB  
TB  
RA  
TA  
GND  
GND  
A50/A51  
RA  
RB  
Slave  
DTE/  
DCE  
RS-485 RS-232  
TB  
TA  
GND  
14  
 
Operation l  
l Chapter 3  
In the graph, TA, TB, RA and RB could be either from RJ-45 or  
Terminal Blocks. The settings of the switches for each A50 (or  
A51) are as follows:  
SW1  
Full-duplex mode  
Off  
SW2 for Master  
Pin1 Pin2 Pin3 Pin4  
TxD always enabled  
RxD always enabled  
On Off X  
X
X
X
On Off  
SW2 for Slaves  
TxD enabled by RTS  
RxD always enabled  
Pin1 Pin2 Pin3 Pin4  
Off On  
X
X
X
X
On Off  
2-wire Half Duplex  
15  
 
Chapter 3 l  
l Operation  
A50/A51  
RS-485  
A50/A51  
RA  
TB  
RA  
RB  
Master  
DTE/  
DCE  
Slave  
DTE/  
DCE  
RS-232  
RS-232  
RB  
TB  
TA  
TA  
GND  
GND  
RS-485  
A50/A51  
RA  
RB  
Slave  
DTE/  
DCE  
RS-232  
TB  
TA  
GND  
RS-485  
16  
 
Operation l  
l Chapter 3  
In the graph, TA, TB, RA and RB could be either from RJ-45 or  
Terminal Block. The settings of the switches for each A50 (or  
A51) are as follows:  
SW1  
Half-duplex mode  
SW2  
TxD enabled by RTS Off On  
RxD enabled by / RTS X  
Pin1 Pin2 Pin3 Pin4  
On  
X
X
X
Off On  
3.3 Simplex/Transmit, Receive  
Simplex configuration means that more than two devices  
(Max. 10 for RS-422; Max. 32 for RS-485) can be linked all  
together to communicate through many A50/A51 devices. Its  
configuration is like the Multidrop's, but the master device can  
talk only and the slave devices can listen only.  
17  
 
Chapter 3 l  
l Operation  
A50/A51  
A50/A51  
TA  
RS-422/ TB  
RA  
RS-232  
RB RS-422/  
TB RS-485  
TA  
RS-232  
DTE/  
DCE  
DTE/  
DCE  
RS-485  
RB  
RA  
GND  
GND  
A50/A51  
RA  
RB RS-422/  
TB RS-485  
TA  
RS-232  
DTE/  
DCE  
GND  
In the graph, TA, TB, RA and RB could be either from RJ-45 or  
Terminal Block. The settings of the switches for each A50 (or  
A51) are as follows:  
SW1  
SW2  
Pin1 Pin2 Pin3 Pin4  
Full-duplex mode Off TxD always enabled On Off X  
X
RxD always enabled  
X
X
On Off  
18  
 
Operation l  
l Chapter 3  
3.4 Self Test  
This configuration is for A50/A51 self test. Run terminal  
emulation program to see if what you received is what you  
typed.  
A50/A51  
TA  
RS-232  
TB  
RB  
DTE/  
DCE  
RA  
GND  
RS-422/485  
In the graph, TA, TB, RA and RB could be either from RJ-45 or  
Terminal Block. The settings of the switches for each A50 (or  
A51) are as follows:  
SW1  
SW2  
TxD always enabled On Off X  
RxD always enabled On Off  
Pin1 Pin2 Pin3 Pin4  
Half-duplex mode On  
X
X
X
19  
 
Chapter 3 l  
l Operation  
20  
 
Appendix A RS-232 Pinouts & Cable Wiring  
RS-232 interface with RJ-45 connector is depicted as follows.  
RJ-45 Connector  
1 2 3 4 5 6 7 8 9 10  
A50/A51 RJ-45  
Connector Pinouts  
RS-232 Signals  
1
2
3
4
5
6
7
8
DCD  
DSR  
RTS  
GND  
TxD  
RxD  
GND  
CTS  
DTR  
-
Always On  
9
10  
~21~  
 
Appendix A l  
l RS-232 Pinouts and Cable Wiring  
Note : Each group of (RTS, CTS) and (DTR, DSR) pins have  
been shorted on A50/A51, which release the users from  
the hardware flow control cable wiring problem. Thus,  
there are two types of RS-232 cable wiring which are  
listed below.  
Type 1:To connect RS-232 side of A50/A51 to a DTE (e.g. PC  
COM1/2) or DCE . (Please check the precise DTE/DCE  
pinouts, the following DTE/DCE pinouts is just an  
example)  
A50/A51  
DTE  
A50/A51  
DTE  
RJ-45 Connector  
DB-25 Male  
RJ-45 Connector  
DB-9 Male  
1 DCD  
2 DSR  
3 RTS  
5 TxD  
6 RxD  
7 GND  
8 CTS  
9 DTR  
8
DCD  
1
2
3
5
6
7
8
9
DCD  
DSR  
RTS  
TxD  
RxD  
GND  
CTS  
DTR  
1
4
8
2
3
5
7
6
DCD  
DTR  
CTS  
RxD  
TxD  
GND  
RTS  
DSR  
20 DTR  
5
3
2
7
4
6
CTS  
RxD  
TxD  
GND  
RTS  
DSR  
22  
 
RS-232 Pinouts and Cable Wiring l  
l Appendix A  
A50/A51  
DCE  
RJ-45 Connector  
DB-25 Female  
1
2
3
5
6
7
8
9
DCD  
DSR  
RTS  
TxD  
RxD  
GND  
CTS  
DTR  
8
6
4
2
3
7
5
DCD  
DTR  
CTS  
RxD  
TxD  
GND  
RTS  
20 DSR  
Type 2: To connect RS-232 side of A50/A51 to a DTE, e.g.  
terminal or PC COM1/2, with 3-pin wiring if don't  
care Hardware flow control.  
A50/A51  
DTE  
A50/A51  
DTE  
RJ-45 Connector DB-25 Male  
RJ-45 Connector DB-9 Male  
5
6
7
3
8
2
9
1
TxD  
RxD  
GND  
RTS  
CTS  
DSR  
DTR  
DCD  
3
2
7
5
4
RxD  
TxD  
GND  
CTS  
RTS  
5
6
7
3
8
2
9
1
TxD  
RxD  
GND  
RTS  
CTS  
DSR  
DTR  
DCD  
2
3
5
8
7
4
6
1
RxD  
TxD  
GND  
CTS  
RTS  
DTR  
DSR  
DCD  
20 DTR  
6
8
DSR  
DCD  
23  
 
Appendix A l  
l RS-232 Pinouts and Cable Wiring  
A50/A51  
DCE  
RJ-45 Connector  
DB-25 Female  
5
TxD  
RxD  
GND  
RTS  
CTS  
DSR  
DTR  
DCD  
2
3
7
4
5
6
RxD  
TxD  
GND  
CTS  
RTS  
DTR  
6
7
3
8
2
9
1
20 DSR  
DCD  
8
24  
 
A p p e n d ix B  
Im p e d a necMatc h ing a n d Termin ation Resistors  
When an electrical signal travels through two different  
resistance junctions in a transmission line, the mismatch will  
sometimes cause signal reflection. Signal reflection causes  
signal distortion, which in turn will contribute communication  
errors. The solution to this problem is to establish the same  
impedance at the line ends as in the line itself by terminating  
them with resistors.  
It is normally sufficient when the value of the termination  
resistor equals the characteristic impedance of the transmission  
line. The resistors should be added near the receiving side. For  
example,  
A50/A51  
Remote site  
TxDA  
TxDB  
RxDA  
RxDB  
RxDA  
RxDB  
TxDA  
TxDB  
~25~  
 
Appendix Bl l Impedance Matching and Termination Resistors  
Note:  
1.  
stands for termination resistor near the receiving  
side. RT1 is the space reserved inside A50/A51 for  
this purpose.  
2. The suggested termination resistor for AWG #26  
cable is 100 ohm.  
3. The suggested termination resistor for phone cable is  
600 ohm.  
26  
 
Appendix C  
Troubleshooting  
Q1. Failure of data transmission.  
Solutions:  
1. Check that the right power adapter is applied.  
2. Check that the RS-232 link is proper.  
3. Check that the RS-422/RS-485 link is proper.  
4. Check that the SW1 and SW2 are set properly.  
Q2. Data loss or error.  
Solution:  
Check that the data rate, data format are the same for  
both devices.  
Q3. How do I do self-test on A50/A51?  
Solution:  
Refer to Chapter 3.4 Self Test .  
~27~  
 
Appendix C l  
l Troubleshooting  
~28~  
 
Chapter 1  
Introduction  
1.1 Overview  
The MOXA RS-232 Surge Protection converter, A60, is  
designed to protect the RS-232 communication line from TOV  
(Transient Over Voltages) which comes from lightning,  
electrostatic discharge and other forms. TOV is always the  
major factor which damages components and makes ports  
unreliable. To improve this problem, we add Transient Voltage  
Suppressor to our I/O ports to clamp surge voltage to protect  
ports from TOV.  
Due to the impulse signal generated by inductive devices in  
factory, the surge protection is best suited for the factory  
automation applications.  
RS-232 Surge  
RS-232  
RJ-45 Connector  
P
rotection  
Power Jack  
( Not used )  
T
R
D
D
R
C
D
X
X
T
S
T
T
C
Remote  
D
D
R
R
S
S
D
Local  
RS-232  
RJ-45 Connector  
Outlook of A60  
~29~  
 
Chapter 1 ·  
1.2 Features and Specifications  
·
Introduction  
Features  
A60's main feature is surge protection up to 2000V. No switch  
is needed. No power is needed. LED indicators are provided to  
show the status of data transmitting/receiving, modem control  
signals and DCD.  
Specifications  
v RS-232 RJ-45 Connectors : supports TxD, RxD, DTR, DSR,  
RTS, CTS, GND, DCD  
v RS-232 Terminal Block : supports TxD, RxD, DTR, DSR,  
RTS, CTS, GND  
v LED Indicators : for TxD, RxD, DTR, DSR, RTS, CTS,  
DCD  
v Surge Protection : up to 2000V, preventing surge from  
remote site.  
v Mounting Kit : plastic plates and screws for mounting A60  
on the wall or any surface.  
~30~  
 
Introduction ·  
·
Chapter 1  
Mounting  
Screw  
RS-232 Surge  
P
rotection  
T
R
D
D
R
C
D
X
X
T
S
T
T
C
D
D
R
R
S
S
D
Remote  
Local  
Fixing Screw  
A60 with Mounting Kit  
1.3 Package Check List  
Upon unpacking your A60 package, you should find the  
following items:  
v A60 RS-232 surge protection converter  
v Mounting Kit  
v A50/A51/A60 User's Manual  
~31~  
 
Chapter 1 ·  
·
Introduction  
~32~  
 
hapter 2  
Installation  
C
2.1 Installation Procedure  
Even though the local and remote ports of A60's are labeled on  
the surface of the A60 converter, please take care when  
connecting the cables to the A60 and the hosts. Note that the  
surge from both the local and the remote site is blocked by the  
A60. However , the LED indicators and the local host are under  
surge protection if and only if the surge comes in from the  
remote port of A60. Hence, it is recommended to keep A60 as  
close as possible to the local host. Otherwise, you may risk  
damaging the A60 itself as well as the local host if surge occurs  
between the A60's local port and the host.  
In addition, you may need a couple of A60s, if both local and  
remote hosts are to be protected from surge.  
Note that remote port and Terminal Block are actually the same  
except that DCD signal is not available in Terminal Block.  
It is recommended to connect GND at the Terminal Block to the  
earth ground to provide a ground path to prevent electric shock  
caused by lightning, no matter RJ-45 or Terminal Block is used.  
~33~  
 
Chapter 2 ·  
·
Introduction  
2000 V Surge  
RS-232 Surge  
P
rotection  
T
R
D
D
R
C
D
X
X
T
S
T
T
C
Remote  
D
D
R
R
S
S
D
Local  
To  
To  
Local  
Host  
Remote  
Host  
Earth Ground  
Please prepare the RS-232 cables, referring to Appendix A, RS-  
232 Cable Wiring.  
2.2 LED Indicators  
There are LED indicators for TxD, RxD, DTR, DSR, RTS, CTS,  
and DCD on top of A60. The indicators are not lighted on when  
not connected with signals. On the contrary, they will be lighted  
on and be one of the red, green or orange colors.  
TxD indicator (signal from local port)  
Green : when connected correctly and no data transmitting.  
Orange : when transmitting data from local to remote site.  
~34~  
 
Installation ·  
·
Chapter 2  
RxD indicator (signal from remote port )  
Green : when connected correctly and no data receiving.  
Orange : when receiving data from remote to local site.  
DTR/RTS indicators (signal from local port)  
Red  
: when connected and DTR (or RTS) signal turned on.  
Green : when connected and DTR (or RTS) signal turned off.  
DSR/CTS/DCD indicators (signal from remote port)  
Red  
: when connected and DSR (or CTS/DCD) signal turned on  
Green : when connected and DSR (or CTS/DCD) signal turned off.  
~35~  
 
Chapter 2 ·  
·
Introduction  
2.3 Self Test  
This configuration is for A60 self-test. Run terminal emulation  
program to see if what you received is what you typed.  
RS-232 Surge  
P
rotection  
T
X
D
R
X
D
D
T
R
D
S
R
R C  
D
C
D
T
S
T
S
1
2
3
4
5
6
7
Remote  
Local  
In the above graph, all the signal lines could be either from  
remote site RJ-45 or Terminal Block and shorted as shown.  
~36~  
 
ppendix A  
RS-232 Pinouts and Cable Wiring  
A
Below is RS-232 pinouts for RJ-45 connector or Terminal  
Block.  
RJ-45 Connector  
Terminal Block Connector  
1
2
3
4
5
6
7
1 2 3 4 5 6 7 8 9 10  
A60 RJ-45  
Connector Pinouts  
A60 Terminal Block  
Connector Pinouts  
Signals  
Signals  
1
2
3
4
5
6
7
8
DCD  
DSR  
RTS  
GND  
TxD  
RxD  
GND  
CTS  
DTR  
-
1
2
3
4
5
6
7
TxD  
RxD  
DTR  
DSR  
RTS  
CTS  
GND  
9
10  
~37~  
 
Appendix A ·  
·
RS-232 Pinouts and Cable Wiring  
There are two types of RS-232 cable wiring which are listed  
below.  
Note: 1. Terminal Block supports no DCD signal.  
2. DTE: Data Terminal Equipment like terminal or PC  
COM1/2; DCE: Data Communication Equipment  
like modem. Please check the precise DTE/DCE  
pinouts, the following DTE/DCE pinouts is just an  
example.  
Type 1: To connect RS-232 local/remote port of A60 to a DTE  
or DCE.  
DTE  
DTE  
A60  
DB-25 Male  
A60  
DB-9 Male  
DCD  
DSR  
RTS  
TxD  
RxD  
GND  
CTS  
DTR  
8
DCD  
DCD  
DSR  
RTS  
TxD  
RxD  
GND  
CTS  
DTR  
1
4
8
2
3
5
7
6
DCD  
DTR  
CTS  
RxD  
TxD  
GND  
RTS  
DSR  
20 DTR  
5
3
2
7
4
6
CTS  
RxD  
TxD  
GND  
RTS  
DSR  
~38~  
 
RS-232 Pinouts and Cable Wiring ·  
·
Appendix A  
DCE  
A60  
DB-25 Female  
DCD  
DSR  
RTS  
TxD  
RxD  
GND  
CTS  
DTR  
8
6
4
2
3
7
5
DCD  
DTR  
CTS  
RxD  
TxD  
GND  
RTS  
20 DSR  
Type 2: To connect RS-232 local/remote port of A60 to a DTE  
with 3-pin wiring if don't care hardware flow control.  
DTE  
DTE  
A60  
TxD  
RxD  
GND  
RTS  
CTS  
DSR  
DTR  
DCD  
DB-25 Male  
A60  
DB-9 Male  
3
2
7
5
4
RxD  
TxD  
GND  
CTS  
RTS  
TxD  
RxD  
GND  
RTS  
CTS  
DSR  
DTR  
DCD  
2
3
5
8
7
4
6
1
RxD  
TxD  
GND  
CTS  
RTS  
DTR  
DSR  
DCD  
20 DTR  
6
8
DSR  
DCD  
~39~  
 
Appendix A ·  
·
RS-232 Pinouts and Cable Wiring  
DCE  
DB-25 Female  
A60  
TxD  
RxD  
GND  
RTS  
CTS  
DSR  
DTR  
DCD  
2
3
7
4
5
6
RxD  
TxD  
GND  
CTS  
RTS  
DTR  
20 DSR  
DCD  
8
~40~  
 
ppendix B  
Troubleshooting  
A
Q1. Failure of data transmission.  
Solutions:  
Check that the RS-232 link is proper.  
Q2. Data loss or error.  
Solution:  
1. Check that the data rate, data format are the same  
for both devices.  
2. Surge occurs during the data transferring. Error  
detection and recovery should be taken in  
applications.  
Q3. How do I do self-test on A50?  
Solution:  
Refer to Chapter 2.3, Self Test.  
 

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