Siemens Simantic ET200SP - Maintenance; Removing and inserting I;O modules;motor starters

Distributed I/O system
236 System Manual, 12/2016, A5E03576849-AG
Maintenance
12
12.1
Removing and inserting I/O modules/motor starters
Introduction
The ET 200SP distributed I/O system supports removal and insertion of I/O modules/motor
starters during operation (RUN operating state).
Requirements
The following table describes which modules you may insert and remove under which
conditions:
Table 12- 1 Removal and insertion of modules
Modules
Removal and insertion
Conditions
CPU No ---
BusAdapter
No
---
CM DP module No ---
Interface module
No
---
I/O modules Yes
• Digital output modules: Only when load is switched off
• Digital modules: For load voltage above the safe extra-low
voltage: Only with switched off load voltage supply
• Technology modules: Only with switched off supply voltage L+
• AI Energy Meter ST:
– Only when measuring voltage on primary side is switched
off, or
– Without the special current transformer terminal, measuring
voltage and load current must be through the converters,
which means the machine or the load must be switched off
in the process. With the special terminal, the process can
continue because the current transformer is isolated safely.
However, the measuring voltage on the module at the con-
nections UL1-UL3 still needs to be isolated.
Motor starter Yes Only when the load is disconnected; when switched on, the motor
starter switches off automatically when the rotary interlock is oper-
ated.
Server module
No
---