Siemens Welding System ST PCS 7 User Manual

ET 200M distributed I/O

Siemens ST PCS 7 · November 2007

11

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Following components are available as accessories for the 

ET 200M:
• Bus modules for hot swapping
• DIN rail for hot swapping
• Covers for backplane bus and bus modules
• Front connectors
• Ex partition for ET 200M
• LK 393 cable duct
• DM 370 dummy module

A mechanical isolation is required between the IM 153 interface 

module and the first Ex I/O module. For the hot swapping func-

tion, an Ex partition is installed which guarantees the prescribed 

isolation distance between non-intrinsically-safe and intrinsi-

cally-safe areas of an ET 200M remote I/O station.

The LK 393 cable duct provides the prescribed isolation be-

tween the load voltage input and the intrinsically safe inputs/out-

puts. The cable duct is easy to fit following insertion of the load 

voltage inputs L+.

• Reservation of slots for unconfigured I/O modules
• Retention of design and address assignment when replacing 

by I/O module

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The figure shows use of the various bus modules for hot swap-

ping - at the top for a redundant connection, at the bottom for a 

non-redundant connection.

ET 200M

standard

modules

Redundant

IM 153-2

High Feature

Special modules, 
80 mm wide,
e.g. FM 355

Bus module BM 1x80

Bus module BM 2x40

Bus module IM 153/IM 153

ET 200M
standard modules

IM 153-2

High Feature

Bus module PS/IM

Bus module BM 2x40

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Order No.

• BM PS/IM for load power supply 

and IM 153, 

incl. 1 bus module cover

• BM 2x40 for 2 modules, each 

40 mm wide

• BM 1x80 for 1 module, 80 mm 

wide

• BM IM/IM 

for two IM 153-2/-2 FOs for de-

sign of redundant systems

• 482 mm long (19 inches)

• 530  mm  long

• 630 mm  long

• 2000 mm long, for vertical instal-

lation

Pack with 4 backplane bus 

covers and 1 bus module cover

• 20-pin, with screw contacts

• 20-pin, with spring contacts

• 40-pin, with screw contacts

• 40-pin, with spring contacts

• 20-pin, FastConnect

B)

• 40-pin, FastConnect

B)

Front connector for Ex analog 
input module 
6ES7 331-7SF00-0AB0 (1 unit) 
• 20-pin, with screw contacts

Enables an accuracy of 

±

 1.5 °K 

for the internal cold junction tem-

perature when taking thermocou-

ple temperature measurements in 

the measuring mode "internal 

compensation" at ambient tem-

peratures of 0 ... 60 °C

Ex partition for ET 200M
• Separation of IM 153 and down-

stream Ex modules within an 

ET 200M line

• Mixed operation of non-Ex and 

Ex modules within an ET 200M 

line

• For supporting the hot swapping 

function in connection with 

IM 153-2

[EEx ib] IIC-conform routing of 

load voltage cable in front plug, 

5 units

including bus connector, labeling 

strips

B) Subject to export regulations: AL: N, ECCN: EAR99H

© Siemens AG 2007