Worth Data RF Terminal 7000 - Manual (Page 78)

Appendixes
Channel and Jumper Changes
Opening a Base
As preparation for changing the Channel on a Base Station or changing the Base to operate as a Relay, the
case must be opened to expose the circuit board with the switches and jumpers. Be sure you disconnect
power before opening the case.
Turn your Base Station upside-down, and unscrew its single phillips head screw. If you don't completely
remove the screw, you can use it as a lever to pull up on the cover.
Otherwise, insert a fingernail, credit card edge or small screwdriver blade into the gap between the Base and
side of the case, and gently use it as a lever to lift up the edge of the Base. Then grasp the edge of the Base
and open it outward like a door.
Changing a Base to a Relay
Moving the jumpers to any of the Relay positions causes the Base Station to operate as a Relay. A Base
station blinks green on power up; a Relay blinks yellow on power up.
RS-422 Termination Jumpers
Refer to the circuit board diagram on page A-1 for details.
The Base can be jumpered to be 422 terminated or not terminated. By default, all Base stations are shipped
as terminated. Use the following guidelines to change the termination for your system:
• If the Base has multiple strings of relays radiating from it, the Base would not be terminated.
• 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.