Three channel – Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual User Manual
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Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Chapter 9
Safety Monitoring Functions
If a short circuit occurs on terminal 12 to ground, the CR30 turns off its safety
outputs within 3.3 seconds. Remove the fault and cycle the contacts to clear the
fault.
If a short circuit occurs from terminal 12 to terminal 13, the CR30 turns off its
safety outputs within 35 ms. Remove the fault and cycle the contacts to clear the
fault.
Three Channel
The CR30 can accept three channels into one safety monitoring function. All
three inputs must be HI to satisfy the input. If any one of the inputs goes LO, the
output of safety monitoring function goes LO and turns off its associated output
devices. The three N.C. inputs can be operated without input test pulses, with
one input test pulse, with only two input test pulses, or with three input test
pulses.
The available input selections for the three channel inputs are:
•
EI_00…EI_11 (embedded input terminals 00…11)
•
MP_12…MP_17 (multi-purpose terminals 12…17)
Pulse testing can be set to 1 Source, 2 Sources, 3 Sources, or Disabled. When 1, 2,
or 3 Sources is selected, the next available test sources are automatically assigned
by the CCW. You can modify the sources afterward.
You can use the default Discrepancy Time and Input Filter or choose to modify
these settings.
The three terminals do not necessarily have to be consecutive.
Figure 84 - Example Schematic for Three N.C. without Test Pulses
Figure 85 - Example Schematic for Three N.C. with One Test Pulse Source
+24V DC
24V Com
05
CR30
02
01
00
03 04
A1
15
20 21
16
06
18
A2
07
19
08
10 11
12 13 14
09
17
+24V DC
24V Com
A
05
CR30
02
01
00
03 04
A1
15
20 21
16
06
18
A2
07
19
08
10 11
12 13 14
09
17