Dual channel ossd – Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual User Manual
Page 70
70
Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
Chapter 9
Safety Monitoring Functions
Pulse testing can be set to 1 Source, 2 Sources, or Disabled. When 1 or 2 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 two terminals do not necessarily have to be consecutive.
Figure 78 - Example Schematic for 2 N.C. without Test Pulse
Figure 79 - Example Schematic for 2 N.C. with Two Test Pulses Sources
Dual Channel OSSD
Safeguarding devices with OSSD outputs generate their own test pulses to detect
for short circuit conditions or have other methods of detecting short circuit
conditions. When configured for dual channel OSSD, the CR30 ignores the test
pulses.
shows examples of products that use dual channel OSSD outputs:
Table 7 - Products Using Dual Channel OSSD Outputs
Short circuits are detected by the safeguarding device, and the safeguarding
device turns off its safety outputs. Devices with OSSD outputs are capable of
operating in high risk applications.
Product Types
Product Name
Light Curtains
GuardShield™
Laser Scanners
SafeZone™, SafeZone Multizone
Gate Interlocks
SensaGuard™, SensaGuard with Integrated Latch
Guardlocking Interlocks
TLS-ZR, 440G-LZ
+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 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