4.10
Safety-Monitoring System (CAT3/CAT4 only)
If you do not operate a machine with a CAT3 or CAT4 safety monitoring system, please
disregard this section.
Machines with CAT3 or CAT4 safety architecture are supplied with a Rockwell CR-30 Safety
Relay
to monitor the safety functions. The Safety Relay continuously monitors the
status of the Emergency Stop contacts, door lock, cradle-lowered sensor, and any other
installed sensors.
The Safety Relay goes into SAFE MODE:
1.
If any fault is detected;
2.
Whenever the door is unlocked or opened;
3.
Whenever the Emergency Stop is pressed;
4.
Wh v h v w f h ‘ f ’ ( l)
Whenever the machine is in SAFE MODE the blue RESET lamp glows, and the machine must
be
‘
reset
’
before it can be operated. To reset the machine, first ensure the door is correctly
closed and locked, the Emergency Stop is released, and the tipper is in the correct position.
Next, press and hold the RESET button for about two seconds. A diagnostic test is run on the
machine, and if all safety functions are operating correctly the lamp will go out when the
button is released, indicating a successful reset. If a fault has been detected in any of the
safety equipment or connections, the machine will not reset and cannot be operated
–
the
RESET lamp will continue to glow.
This documentation is to assist an engineer or electrician to find and repair any fault
preventing the system from resetting. Most faults can be traced from the LEDs on the CR30
safety relay itself; some locks and sensors also have LEDs to assist in trouble-shooting.
440C-CR30 Safety Relay
The 440C-CR30-22BBB (CR30) relay is a software-configurable safety relay. This device is
intended to be part of the safety-related control system of a machine. The CR30 safety relay
is based on the Micro800 platform and must be configured using a personal computer (PC)
with the Allen-Bradley® Connected
Components Workbench software.
The CR30 housing is red to signify it as a
safety device and to distinguish it from the
grey-coloured standard controllers.
The CR30 safety relay accommodates up to 24
safety monitoring functions. Examples of safety
monitoring functions are single channel input,
dual channel input, two hand control, reset,
and feedback. It has 22 embedded safety
rated inputs and outputs and accepts up to
two plug-in modules, each of which has four
standard inputs and four standard outputs.
