Installation Guidelines; Dc Supply; Establishing The Connection To The S5-100U Bus - Siemens SIMATIC S5 Manual

Standard Function Counter
2

Installation Guidelines

This section describes how to establish the connections with the programmable controller and the
process I/O.
2.1 24 V DC Supply
The IP 265 is a non-floating module. The 24 V DC load current circuits share the same ground with
the control circuit of the PLC.
Figure 2-1 shows the simplified connection of the IP 265 to the PLC.
Central ground
Figure 2-1. Simplified Representation for Non-Floating Connection of the IP 265 to the PLC
Note
When using the IP 265, you must connect the ground of the IP 265 load voltage con-
nector with the CPU ground via an external connection at the central grounding point.
When doing so, please make sure you use a low-resistance connecting cable (cable
should be as short as possible).
2.2

Establishing the Connection to the S5-100U Bus

The IP 265 is like an I/O module of the S5-100U system and is snapped onto a bus unit. You must
note the following points when assembling and dismantling the module:
• The IP 265 may be plugged in or removed only without load voltage and when the CPU is in the
STOP state.
• The memory submodule may be plugged in or removed only when the module and the CPU are
in the POWER OFF state.
• The IP 265 can only be snapped onto a bus unit in slots 0 to 7 of the programmable controllers.
• For instructions on assembling and dismantling the module, see the IP 265 Manual or the
System Manuals for the S5-100U, S5 90/95U or ET 200.
EWA 4NEB 812 6131-02
CPU
L+
M
L+ M
External power supply
Installation Guidelines
IP
L+
M
Connector for
load voltage
2-1