Type iiia two-hand control, Type iiic two-hand control – Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual User Manual
Page 66

66
Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Chapter 9
Safety Monitoring Functions
Type IIIA Two-hand Control
The Type IIIA uses only one normally open contact for each hand. This
configuration can be set up with or without the use of test pulses. The test pulses
provide short circuit fault detect between channels and between channel and
24V.
Figure 69 - Example Wiring Connection for a Type IIIA Two-hand Control without Test Pulses
Figure 70 - Wiring Connection for a Type IIIA Two-hand Control with the Test Pulses
Type IIIC Two-Hand Control
The Type IIIC uses a normally open and a normally closed contact for each hand.
Figure 71 - Example Wiring Connection for a Type IIIC Two-hand Control without Test Pulses
When test pulses are used, the CR30 will detect a short from Channel 1 to
Channel 2 after 3.7 seconds and turn the output OFF. To clear the fault, release
both buttons.
+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
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
A B
+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
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