TC12 Installation, Commissioning & Maintenance Handbook
Table 3 Mod PCB 2/4 re Se - em Wi lect Switch (SW4)
Operation 2 - Wire Operation 4 - Wire
MODEM 1 → 4 - Wire
Switch 1 → 2 - Wire Switch 1
MODEM 2 → 4 - Wire
Switch 2 → 2 - Wire Switch 2
MODEM 3 → 4 - Wire
Switch 3 → 2 - Wire Switch 3
MODEM 4 → 4 - Wire
→Switch 4 2 - Wire Switch 4
1
2
3
4
2 - WIRE
4 - WIRE
SW4
h (SW5)
S e number)
Table 4 - Modem PCB Transformer Select Switc
witch numbers (Corresponds to Modem with sam
1 2 3 4 5 6
S
tra
an
NOT USED
et switch to 1 (Closed) to select on board
nsformer for the Modem in question i.e. for
y Modem NOT connected to a transformer
board.
S
tran
any Modem connected to a transformer board.
et switch to 0 (Open) to select off board
sformers for the Modem in question i.e. for
See Figure 8 for Switch Positions for Switches 0 and 1
666/HE/43100/000 Page 33 Issue 9