Base Station Cable Choice - Worth Data 7100 RF Terminal Series Owner's Manual

Setting the Relay ID
If you only have one relay, there is no need to set the Relay ID which is shipped default as relay 1. If you need to change it or you
have multiple relays, it must be changed using the RF 7000 Base Serial Configuration Utility.
RS-422 Termination
When adding Relays to a system, the last Relay(s) in the line(s) must be terminated. By default, all Base stations are shipped as
terminated. Use the following guidelines to change the termination for your system:
Refer to the circuit board diagram on the previous page for details.

If the Base has multiple strings of relays radiating from it, the Base would not be terminated but each Relay would.

If the Base is first in a string, (not in the middle or end of a string), set the 422 jumpers to Base w/RS-422 termination.

The last Relay in each string should have its jumpers set as a Relay w/RS-422 termination. Any Relay that is not the last relay
in the string would not be terminated.

Relay Station failures are often cable-related. If a Terminal puts out a "Who Can Hear Me?" message and a Relay that is
for some reason not connected to the Base Station (bad cable, cut cable, broken connectors) hears it, it answers with the
message:
Relay n Cannot Be
Heard by the Base
Notify Supervisor
Press Any Key
At this point, it is up to the operator to notify someone that the Relay is not communicating with the Base and to check the cabling
first. There is no message sent to the host, so it is very important that the operator that receives this message notify someone im-
mediately.

Base Station Cable Choice

The Base Station is connected to a PC with one of the following cables:
C21 USB Cable
This is standard full size A-B USB Cable.
F34 DB25 Null Modem Cable
These are the pin-outs for Cable F34, a DB25 Female to 8 pin modular RJ45 with pins 2 and 3 crossed, used for a Base connected
directly to a 25 pin male host serial port.
Modular Pins 5-8 are connected to DB25 pins 5,6,8,4 but not used by the RF Base.
If you are planning to use a serial extension cable of 80 feet or more, you need to open the DB25 shell of our cable and be sure
that only pins 1,3,2, and 7 are connected. All others should be cut. This is necessary to keep Windows from following noise tran-
sitions as handshaking transitions that can severely degrade the application or even crash Windows.
F36 DB9 Straight Cable
These are the pin-outs for Cable F36, a DB9 Female to 8 pin modular RJ45. This cable is used to connect the Base to a 9 pin Male
host serial port.
Mod 8 RJ45 Function
1 Frame Ground
2 Transmit Data
3 Receive Data
4 Signal Ground
F34 Null Modem Cable
77
DB25 Female
1
3
2
7