Rockwell Automation 1791ES-IB16 Guard I/O EtherNet/IP Safety Modules - Manual (Page 13)

Rockwell Automation Publication 1791ES-UM001D-EN-P - May 2013 13
About the Modules Chapter 1
The following is a list of features common to Guard I/O modules:
• CIP-safety and EtherNet/IP protocol conformance
• Safety inputs
– Safety devices, such as emergency stop push buttons, gate switches, and
safety light curtains, can be connected.
– Dual-channel mode evaluates consistency between two input signals
(channels), which allows use of the module for Safety Category 3 and 4.
– The time of a logical discrepancy between two channels can be
monitored by using a discrepancy time setting.
– An external wiring short-circuit check is possible when inputs are wired
in combination with test outputs.
– Independently adjustable on and off delay is available per channel.
• Test outputs
– Separate test outputs are provided for short circuit detection of a safety
input (or inputs).
– Power (24V) can be supplied to devices, such as safety sensors.
– Test outputs can be configured as standard outputs.
– All Guard I/O modules have numerous test outputs, of which some can
be used for broken wire detection of a muting lamp.
• Safety outputs
– Dual-channel mode evaluates consistency between two output signals
(channels).
– Safety outputs can be pulse tested to detect field wiring shorts to
24V DC and 0V DC.
• I/O status data - In addition to I/O data, the module includes status data
for monitoring I/O circuits.
• Removable I/O connectors - I/O connectors support mechanical keying.
About Catalog Numbers See the table for a listing of the types of Guard I/O modules.
Catalog Number Description Enclosure Type
Rating Safety Inputs Test Outputs (1) Safety Outputs
Solid State
1791ES-IB16 Safety input module Meets IP20 16 16 —
1791ES-IB8XOBV4 Safety I/O module with solid state outputs 8 8 4 bipolar pairs
(1) Broken wires can be detected on the muting outputs.