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.
Содержание 7000 Series
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