GE P741 Technical Manual page 438

Maintenance
MiCOM P741, P742, P743
REF DESCRIPTION
1 Assy Power Supply (24/54V)
2 Assy Relay Output
3 Assy Opto Input
6 AssyEthernet (100Mbps) only
nd
Assy 2
Assy Redundant Ethernet (SHR) Modulated IRIG-B
Assy Redundant Ethernet (SHR) non Modulated IRIG-B
Assy Redundant Ethernet (RSTP) Modulated IRIG-B
Assy Redundant Ethernet (RSTP) non Modulated IRIG-B
Assy Redundant Ethernet (DHS) Modulated IRIG-B
Assy Redundant Ethernet (DHS) non Modulated IRIG-B
7 Assy Coprocessor
8 Communication board
9 Assy High break relay output
23 Assy Standard Input Module
24 Input Module (Univ. Inputs only)
29 Assembly Screen Plate
FIGURE 4: P743 – PCB/MODULE LOCATIONS (VIEWED FROM FRONT)
The 64-way ribbon cable to the front panel also provides the electrical connections between
PCBs with the connections being via IDC connectors.
The slots inside the case to hold the PCBs securely in place each correspond to a rear
terminal block. Looking from the front of the relay these terminal blocks are labelled from
right to left.
Note:
(48/125V)
(110/250V)
rear port only
To ensure compatibility, always replace a faulty PCB with one of an
identical part number.
P74x/EN MT/Na7
(MT) 11-9
MATERIAL
ZN0021 001
ZN0021 002
ZN0021 003
ZN0019 001
ZN0017 012
ZN0049 001
nd
ZN0025 002 2
ZN0071 001
ZN0071 002
ZN0071 005
ZN0071 006
ZN0071 007
ZN0071 008
2070273 003
2070273 001
ZN0042 001
GN0010 074
GN0010 089
GN0058 001
MT