Siemens Welding System ST PCS 7 User Manual

Page of 344
Process I/O
ET 200M distributed I/O
DI - digital input modules
11/14
Siemens ST PCS 7 · November 2007
11
Overview
The digital input modules described here break down into
• simple signal modules for direct and alternating voltage, and
• modules with diagnostics capability that automatically output 
a corresponding message to the operator system in the event 
of a fault.
Selection and Ordering Data
Order No.
SM 321 for floating contacts (supply with DC voltage)
 
16 inputs, 24 V DC
Redundant design possible 
(module redundancy)
• Electrically isolated in groups 
of 16
• Front connector required: 
20-contact
6ES7 321-1BH02-0AA0
16 inputs, 24 V DC
• Electrically isolated in groups 
of 16; active low
• Front connector required: 
20-contact
6ES7 321-1BH50-0AA0
16 inputs, 24 V DC, high-speed
• Electrically isolated in groups 
of 16
• 0.05 ms input delay 
• Front connector required: 
20-contact
6ES7 321-1BH10-0AA0
32 inputs, 24 V DC
Redundant design possible 
(module redundancy)
• Electrically isolated in groups 
of 16
• Front connector required: 
40-contact
6ES7 321-1BL00-0AA0
16 inputs, 48 to 125 V DC
• Electrically isolated in groups 
of 8
• Front connector required: 
20-contact
6ES7 321-1CH20-0AA0
B)
SM 321 for floating contacts (supply with DC/AC voltage)
 
16 inputs, 24 to 48 V AC/DC
• Electrically isolated in groups 
of 1
• Front connector required: 
40-contact
6ES7 321-1CH00-0AA0
B)
SM 321 for floating contacts (supply with AC voltage)
 
32 inputs, 120 V AC
• Electrically isolated in groups 
of 8 
• Front connector required: 
40-contact
6ES7 321-1EL00-0AA0
B)
8 inputs, 120/230 V AC
Redundant design possible 
(module redundancy)
• Electrically isolated in groups 
of 2
• Front connector required: 
20-contact
6ES7 321-1FF01-0AA0
B)
16 inputs, 120/230 V AC
• Electrically isolated in groups 
of 4 
• Front connector required: 
20-contact
6ES7 321-1FH00-0AA0
B)
B) Subject to export regulations: AL: N, ECCN: EAR99H
© Siemens AG 2007