Power I/O Interface Pcb Layout; Figure 2-5 565-256 Power I/O Interface Pcb Assembly; Figure 2-6 565-220 Power I/O Interface Pcb Assembly; Figure 2-7 Voltage Points On Power I/O Pcb Connectors And Terminal Blocks - Simplex 4020 Troubleshooting Manual

4020 Power I/O Interface,
Power I/O Interface PCB
Layout
565-256 P4 Connector
+ 24 V (System)
3
0 V
2
+ 5 V (Std Slaves)
1
565-220 P2 Connector
+ 5 V (Std Slaves)
4 1
0 V
0 V
5 2
+ 24 V (System)
6 3
Figure 2-7. Voltage Points on Power I/O PCB Connectors and Terminal Blocks
Continued
P1
P2
P3
Figure 2-5. 565-256 Power I/O Interface PCB Assembly
P1
P2
Figure 2-6. 565-220 Power I/O Interface PCB Assembly
565-256 P2 or P3 Connector
6
0 V
5
Trouble
4
(Low = Trouble)
565-220 P8 or P9 Connector
+ 36 V
(Mapnet)
P4 J1 P5
P6
J1
J2
565-256 TB2, TB3 or TB4 Terminal Block
0 V
4 3
2 1
+ 36 V
(Mapnet)
Trouble
(Low = Trouble)
1 2
3 4
0 V
2-10
P12
TB2
TB3
P10
P13
TB4
R139
P14
P7 P8 P9 P11
P3 P4 P5 P6
0 V
6 5 4 3 2 1
+ Return
– Return
565-220 TB1 Terminal Block
8
B– Return
7
B+ Return
6
0 V B
5 +24 V B-tap
4 A– Return
A+ Return
3
0 V A
2
+24 V A-tap
1
Continued on next page
RED BLK YEL
P7
TB1
P8
P9
+ 24 V A-tap ( TB2 )
+ 24 V B-tap ( TB3 )
+ 24 V C-tap ( TB4 )