User manual

Publication ENET-UM001I-EN-P - January 2010 25
EtherNet/IP Overview 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 st
op push buttons, gate switches,
and safety light curtains, can be connected.
– Dual-channel mode evaluates consistency between two input signals
(c
hannels), which allows use of the module for Safety Category 3
and 4.
– The time of a logical discrepancy between two channels can be
mon
itored using a discrepancy time setting.
– An external wiring short-circuit check is possible when inputs are
wire
d in combination with test outputs.
– Ind
ependently adjustable on and off
delay is available per channel.
•Test outputs
– Separate test outputs are provided for short circuit detection of a
saf
ety 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
(c
hannels).
– 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
key
ing.
Guard I/O Catalog Numbers
See the table for a listing of the types of Guard I/O modules.
Types of Guard I/O Modules
Catalog Number Description Enclosure
Ty
pe
Rating
Safety
Inp
uts
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.