Effect Of Incorrect Switch Settings On The Psu Pcb; Figure 16 - Modem And Psu Pcb Status Leds - Siemens TC12 Installation, Commissioning And Maintenance Handbook

2.4.2 Effect of Incorrect Switch Settings on the PSU PCB

(1) S1 - PC Address
If this switch is set to a PC number which does not exist, the UTC TCC FAIL
indicator on the local SIP will light up. The traffic control computer will display an
error message to say that the PC is disconnected.
(2) S2 - Audio Alarm Configuration Switch
666/HE/43100/000
TC12 Installation, Commissioning & Maintenance Handbook

Figure 16 - Modem and PSU PCB Status LEDs

MODEM BOARD STATUS LEDs
LP1 (RED LED) - +12v
LP2 (RED LED) - -12v
LP3 (RED LED) - +5v
LP4 (YELLOW LED) - MODEM 1 TRANSMIT (TX1)
LP5 (GREEN LED) - MODEM 1 RECEIVE (RX1)
LP6 (YELLOW LED) - MODEM 2 TRANSMIT (TX2)
LP7 (GREEN LED) - MODEM 2 RECEIVE (RX2)
LP8 (YELLOW LED) - MODEM 3 TRANSMIT (TX3)
LP9 (GREEN LED) - MODEM 3 RECEIVE (RX3)
LP10 (YELLOW LED) - MODEM 4 TRANSMIT (TX4)
LP11 (GREEN LED) - MODEM 4 RECEIVE (RX4)
PSU BOARD STATUS LEDs
PC POWER
AUDIO OFF
Page 48 Issue 10