Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual User Manual
Page 67
Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
67
Safety Monitoring Functions
Chapter 9
Figure 72 - Wiring Connection for a Type IIIC Two-hand Control with Test Pulses
The timing diagram for the two-hand control is shown in
. The Type
IIIA uses only the N.O. contact of the button. The Type IIIC uses both the N.C.
and the N.O. contacts.
Figure 73 - Two-hand Control Timing Diagram
Description
Description
1
Hand 1 button is pressed.
5
Hand 2 button is pressed.
2
Hand 2 button must be pressed within 500 ms
for the output logic to turn ON.
6
Hand 1 button must be pressed within 500 ms
for the output logic to turn ON.
3
Releasing either hand button causes the logic
output to turn off.
7
Releasing either hand button causes the logic
output to turn off.
4
Both hand buttons must be released to start a
new cycle.
8
Both hand buttons must be released to start a
new cycle.
+24V DC
24V Com
A B
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
Logic Output
Hand 1 N.C.
Hand 1 N.O.
Hand 2 N.C.
Hand 2 N.O.
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
1
4
3
2
5
6
7
8
must be less than 500ms