User Manual

AS4000 Subscriber Terminal
Installation and Commissioning DLP 011
605-0000-436
Issue 1.5 Date: 18th October 1999
Page 6 of 8
Drop Cable Termination at the PSU (Type 4 only)
1. At the PSU punch down the wires of the drop cable, to the IDC terminal blocks
(TB1 & TB2) using an Auto Trim Termination Tool and connect the DC and
screen to the Wago block . The Figure 38 below, illustrates the connections of the
drop cable to the connector blocks inside the PSU.
TYPE 4 PSU
Connector Detail
SRX+
SRX-
STX+
STX-
VIO
ORA
BLU WHI
RED
BLK
SCR
TO NTUs
FROM CRU
+VDC 0VDC SCR
TB1
TB2
3 2b2a1
4321 8765
7654
AGC
PC
Downlink
Uplink
Yellow
Grey
SRX+
SRX-
STX+
STX-
Figure 38. ST-I1 Drop Cable Connections to Type-4 PSU
Terminal Function Description Colour
TB1 1 +24V DC DC +ve Supply Red
TB1 2a 0V DC DC -ve Supply Black
TB1 2a 0V DC See Note 1
TB1 3 0V (Chassis
Earth)
Drain /Screen
(Monitor)
Tinned
TB1 4 Up Link
Comms
System Data -
RS232 Transmit
Grey
TB1 5 Down Link
Comms
System Data -
RS232 Receive
Yellow
TB1 6 PC Mon (outer) Monitor Breakout Green
TB1 7 AGC Mon (outer) Monitor Breakout Brown
TB2 5 SRX+ RX Violet
TB2 6 SRX- RX Orange
TB2 7 STX+ TX Blue
TB2 8 STX- TX White