Table 3 - Modem Pcb 2/4 Wire Select Switch (Sw4); Table 4 - Modem Pcb Transformer Select Switch (Sw5) - Siemens TC12 Installation, Commissioning And Maintenance Handbook

Table 3 - Modem PCB 2/4 Wire Select Switch (SW4)

2 - Wire Operation
MODEM 1 Switch 1 → 2 - Wire
MODEM 2 Switch 2 → 2 - Wire
MODEM 3 Switch 3 → 2 - Wire
MODEM 4 Switch 4 → 2 - Wire

Table 4 - Modem PCB Transformer Select Switch (SW5)

Switch numbers (Corresponds to Modem with same number)
1
Set switch to 1 (Closed) to select on board
transformer for the Modem in question i.e. for
any Modem NOT connected to a transformer
Set switch to 0 (Open) to select off board
transformers for the Modem in question i.e. for
any Modem connected to a transformer board.
See Figure 8 for Switch Positions for Switches 0 and 1
666/HE/43100/000
TC12 Installation, Commissioning & Maintenance Handbook
4 - WIRE
SW4
2 3
board.
Page 33
4 - Wire Operation
Switch 1 → 4 - Wire
Switch 2 → 4 - Wire
Switch 3 → 4 - Wire
Switch 4 → 4 - Wire
1
2
2 - WIRE
3
4
4 5
NOT USED
6
Issue 10