All racks included:

• Mounting rail with threaded bolts for fixing the modules and lateral cutouts for mounting the rack
• Plastic parts serve as guides when swinging the modules into place
• Connection for protective conductors
• Backplane bus with plug-in connections

UR1 for central controllers

• 18 single-width slots
• Always required: Power module (PS) and one CPU
• Can be expanded centrally (up to 5 m) and in distributed configuration (up to 600 m)
• The following are required when expanded:
  • Interface modules (send IMs); max. 6 interface modules can be plugged in
• Up to 21 expansion units can be connected

UR2 for central controllers

• 9 single-width slots
• Always required: Power module (PS) and one CPU
• Can be expanded centrally (up to 5 m) and in distributed configuration (up to 600 m)
• The following are required when expanded:
  • Interface modules (send IMs); max. 6 interface modules can be plugged in
• Up to 21 expansion units can be connected

CR2 for central controllers

• 18 single-width slots; 2 segments with 8 or 10 slots
• Always required: Power module (PS) und 2 CPUs
• Can be expanded centrally (up to 5 m) and in distributed configuration (up to 600 m)
• The following are required when expanded:
  • Interface modules (send IMs). Max. 6 interface modules can be plugged in
• Up to 21 expansion units can be connected.
• 2 CPUs can be operated next to each other, each with its own I/O:
  2 P bus segments with 10 or 8 slots for 1 CPU each with its own I/O
• C bus throughout: C bus nodes can be addressed from both segments.

CR3 for central controllers

• 4 single-width slots
• Always required: Power module (PS) and one CPU
• Can be expanded centrally (up to 5 m) and in distributed configuration (up to 600 m)
• The following are required when expanded:
  • Interface modules (send IMs); max. 2 interface modules can be plugged in
• Up to 16 expansion units can be connected
• C bus and P bus throughout

UR2-H

• 18 single-width slots; 2 segments with 9 slots each
• Always required: 2 power modules (PS) und 2 CPUs
• Can be expanded centrally (up to 5 m) and in distributed configuration (up to 600 m)
• The following are required when expanded:
  • Interface modules (send IMs); max. 6 interface modules can be plugged in
• Up to 21 expansion units can be connected
• 2 CPUs can be operated next to each other, each with its own I/O:
  2 P bus segments and 2 C bus segments with 9 slots each for 1 CPU each with its own I/O
• C bus throughout: C bus nodes can be addressed from both segments

UR1 for expansion units

• 18 single-width slots
• Always required: Interface module (receive IM)

UR2 for expansion units

• 9 single-width slots
• Always required: Interface module (receive IM)

ER1 for expansion units

• 18 single-width slots
• Always required: Interface module (receive IM)
• P bus with restricted functionality:
  • No alarm processing
  • No battery backup of the plugged-in modules
  • No 24 V DC supply of the modules
• No C bus
• The following can be used:
  • SM modules
  • Receive IM
  • Power supply module

ER2 for expansion units

• 9 single-width slots
• Always required: Interface module (receive IM)
• P bus with restricted functionality:
  • No alarm processing
  • No battery backup of the plugged-in modules
  • No 24 V DC supply of the modules
• No C bus
• The following can be used:
  • SM modules
  • Receive IM
  • Power supply module