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
Figure 47 - Example Schematic for 2-Sensor T-Type Muting
For simplicity, the power and ground connections of the light curtain and muting
sensors are not shown. The light curtain and muting sensors must have the same
reference (24V Com) as the CR30 for proper operation.
For proper operation, the muting sensors are on (normally closed) when not
muting, and the light curtain OSSD outputs are also on (the light curtain is
clear).
Figure 48 - Muting Time for 2-Sensor T-Type Muting
shows the muting and synchronization times that are selectable in the
CCW. These times are linked. For example, if you select a 10 s muting time, then
the synchronization time between MS1 and MS2 is 3 s. To use a synchronization
time of 6 s, you must select a 60 s muting time.
Note:
The synchronization time also depends on the input filter time
settings for the muting sensor inputs.
Synchronization time (total) = 2 x Input Filter Time + Synch Time
+24V DC
Light Curtain
24V Com
MS1
MS2
A
OSSD A
OSSD B
Override
Contactors
for Conveyor Power
Muting Lamp
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
K2
K1
LC
Muting sensor 1
Muting sensor 2
Muting lamp
t > 30ms
t > 30ms
t > 50ms
30ms <= t
t < synchronization
time
30ms <= t
t < synchronization
time
t < muting time
muted