Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual - Manual (Page 48)

48 Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Chapter 9 Safety Monitoring Functions
Feedback Monitoring The Feedback function block is used in safety systems to monitor the status of
output devices (like safety contactors). When the output device is off, a HI signal
is fed back to the input of the CR30 to indicate that the device is indeed off.
When the output device is energized, the feedback signal goes LO. If the output
device remained energized, the feedback signal remains LO and the CR30 will
not energize the output. The feedback contacts can be positive-guided,
mechanically linked, or mirrored contacts.
The CR30 accepts 1, 2, 3, or 4 inputs into each feedback block. All inputs must
be HI for the output of the block to go HI.
In the CCW, click and drag (or double-click) the block to an available Safety
Monitoring Function spot.
Figure 36 - Feedback Monitoring Function Block
The available input selections for the Feedback Monitoring are:
• EI_00…EI_11 (embedded input terminals 00…11)
• MP_12…MP_17 (multi-purpose terminals 12…17)
• P1_00…P1_03 (plug-in 1 terminals 00…03)
• P2_00…P2_03 (plug-in 2 terminals 00…03)
• SP_00…SP_15 (Modbus inputs 00…05)
You can modify the number of inputs within the range of 1…4.
You can use the default Input Filter or choose to modify this setting.