Allen-Bradley Guardmaster 440C-CR30-22BBB - Circuit Status

62 Rockwell Automation Publication 440C-WD001C-EN-P - June 2015
Chapter 12 Dynamic Feedback
Circuit Status
The E-stop is released and all output devices (D1…D4) are OFF. The Feedback
Closed indicator is ON.
Operational Sequence
1. Press the Reset button.
All four output devices D1…D4 turn ON and the Feedback Closed
ind
icator turns OFF.
2. P
ress the E-stop button.
A
ll four output devices D1…D4 turn OFF and the Feedback Closed
ind
icator turns ON.
With a short circuit across one of the output device contacts:
1. Press the Reset button.
A
ll four output devices D1…D4 turn ON and the Feedback Closed
in
dicator remains ON. After approximately 50 ms, the output devices
D1…D4 turn OFF and the Feedback Closed indicator remains ON.
Each time the reset button is pressed, the output turns ON momentarily and
the
n turns OFF. The CR30 safety relay detects the short circuit with the XOR
logic in the LL2A function block. This block allows either the Feedback_OK or
Feedback_Fault to turn on the output devices, but not both signals.
Example Bill of Materials
Table 17 - Bill of Materials
Safety Rating
Depending on how the output devices are connected, this application can meet
Cat 1, Cat 3, or Cat 4 per ISO13849-1.
Item Product Description Qty
1 440C-CR30-22BBB Guardmaster 440C-CR30 Software Configured Safety Relay
PLe SIL 3, 22 Safety I/O, embedded serial port, USB programming
port, 2 plug-in slots, 24V DC
1
2 800FM-MT44 800F Non-illuminated Mushroom Operators
Twist-to-release, 40 mm, round metal (Type 4/13, IP66), red,
standard pack (Qty. 1)
1
2.1 800F-ALM Metal Latch 1
2.2 800F-X01S Screw Contact Block
1 N.C. self-monitoring
1
2.3 800F-X01 Screw Contact Block
1 N.C.
1
3 800FM-F611MX10 800F Push Button
Metal, flush, blue, R, metal latch mount, 1 N.O. contact, 0 N.C.
contacts, standard, standard pack (Qty. 1)
1
4 TBD Customer-specified Output Device 4