Siemens Simatic S7-1500H - Connecting the Supply Voltage

7.5 Connecting the supply voltage
Introduction
The supply voltage is supplied over a 4-pin connector at the front of or bottom of the R/H-
CPU.
Connection for supply voltage (X80)
The connections of the 4-pole connector have the following meaning:





/
/0
0
① +24VDC of the supply voltage (current limited to 10A)
② Ground of the supply voltage (current limited to 10A)
③ Ground of the supply voltage for loop-through
④ +24VDC of the supply voltage for loop-through
⑤ Spring opener (one spring opener per terminal)
Figure 7-3Connection for supply voltage
The cable connector enables you to loop the supply voltage uninterrupted, even when it is
unplugged.
Requirements
•
Only wire the cable connector when the supply voltage is turned off.
•
Follow the wiring rules (Page 174).
Tool-free connection of cables: multi-wire (stranded), with end sleeve or ultrasonic compressed
To connect a wire without tools, follow these steps:
1.
Strip 8 to 11 mm of the wires.
2.
Seal or crimp the wire with end sleeves.
3.
Insert the cable into the push-in terminal as far as it will go.
4.
Push the wired connector into the socket of the CPU.
Tools required
3 to 3.5mm slotted-head screwdriver
176
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
Wiring
7.5 Connecting the supply voltage