20 en | Installation NurseCall Main Unit
F.01U.252.699 | V1.1 | 2012.01 User Manual Bosch Security Systems
3.2.9 Setting the 100 Ohm termination jumper
Within the NurseCall Main or Relay Units, the RS-485 interface can be configured with a
jumper.
1. Disassemble the unit as described in Section 7.5.1 Disassembling the unit, page 48.
2. Remove the communication board as described in Section Removing the communication
board, page 48.
3. Put the 100 Ohm termination jumper J112 (1).
4. Assemble the communication board and the unit. This is basically the reverse of the
disassembling procedure, see Section 7.5.1 Disassembling the unit, page 48.
1
NOTICE!
If you do not want to disassemble the NurseCall Main Unit, you also can short-out pins 3 and 4
of the connector. This has the same effect as the jumper setting described above.
See Section A.7.4 RS-485 socket (unit rear), page 59 for connector wiring.
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