Page
30 of 40
Issue 2
13/12/99
PETS-2 Crossing Telephone System
QUICKFIX INSTALLATION HANDBOOK
30
# = these line circuits are not equipped on standard units.
BLOCK 3 - the upper block (pair1 to the left)
NOTE: CONNECTIONS TO THIS BLOCK ARE ISOLATED FROM THE REST OF THE
SYSTEM - DO NOT JUMPER FROM BLOCK 3 TO THE OTHER BLOCKS.
Pair
Signalbox
Level Crossing
Description
1a
NC
NC
Spare
1b
NC
NC
Spare
2a
NC
NC
Spare
2b
NC
NC
Spare
3a
T4 (P)
NA
Block switching 4 wire (intermediate SB only)
3b
T4 (O)
NA
Block switching 4 wire (intermediate SB only)
4a
T4 (N)
T4 (N)
Four wire transmission Rx cct. Leg a
4b
T4 (M)
T4 (M)
Four wire transmission Rx cct. Leg b
5a
T3 (L)
NA
Block switching 4 wire (intermediate SB only)
5b
T3 (K)
NA
Block switching 4 wire (intermediate SB only)
6a
T3 (J)
T3 (J)
Four wire transmission Tx cct. Leg a
6b
T3 (I)
T3 (I)
Four wire transmission Tx cct. Leg b
7a
NA
NA
T2 relay ‘normally closed’ contact
7b
NA
NA
T2 relay ‘normally closed’contact
8a
T2 (F)
NA
Block switching 2 wire (intermediate SB only)
8b
T2 (E)
NA
Block switching 2 wire (intermediate SB only)
9a
T1 (D)
NA
Block switching 2 wire (intermediate SB only)
9b
T1 (C)
NA
Block switching 2 wire (intermediate SB only)
10a
T1 (B)
T1 (B)
Two wire transmission cct. leg a
10b
T1 (A)
T1 (A)
Two wire transmission cct. leg b
5.8.1 Power supply
Power supply wiring descriptions are common to both Signal Box and level Crossing units.
Power supply connections are through the 9 pin (male) ‘D’ connector on the left hand side
of the case. The ‘D’ connector wiring is in accordance with the following table:
Pin
Function
Wire/ colour
1
Battery/ supply -ve (negative) -24V to 55V dc nominal
0.5mm/ 0.6mm, Pair 1a
2
NC
3
NC
4
NC
5
Battery/ ve
0.5mm/ 0.6mm, Pair 1b
6
Battery/ supply -ve -24V to 55V dc nominal
0.5mm/ 0.6mm, Pair 2a
7
Alarm -
0.5mm/ 0.6mm, Pair 3b
8
Alarm +
0.5mm/ 0.6mm, Pair 3a
9
Battery/ ve
0.5mm/ 0.6mm, Pair 2b