CAUTION: Disconnect Power Prior to Checkout
Before performing the initial checkout procedure, make certain all power is disconnected
from the machine to be controlled.
Dangerous voltages may be present along the Safety Module wiring barriers whenever power to the
machine control elements is On. Exercise extreme caution whenever machine control power is
or may be present. Always disconnect power to the machine control elements before opening
the enclosure housing of the Safety Module.
1. Remove power to the machine control elements, if it is already connected.
2. Apply force to the mat’s sensing area, using a test piece as outlined in the mat manufacturer’s literature, or the
appropriate standard.
3. Apply input power to the Safety Mat Monitor Module at terminals A1 and A2 or B1 and B2. Verify that only the Power
indicator LED is ON.
4. Remove the test piece from the safety mat (clear the mat sensing area).
5. Manual Reset mode: Ch1 and Ch2 indicators should be flashing. Close and reopen the Reset switch.
6. Verify that the Ch1 and Ch2 indicators both come ON. If only one indicator comes ON or if any indicator is flashing,
refer to the Troubleshooting section for more information. Return to step 2 after correcting the problem.
7. Apply force in several locations (using a test piece) to the mat’s sensing area, per the mat manufacturer’s
recommendations. Verify that the Ch1 and Ch2 indicators turn OFF simultaneously. If either indicator does not go OFF,
disconnect the input power and check all wiring. Return to step 2 after correcting the problem.
8. Repeat for each safety mat individually.
9. Close and secure the enclosure. Apply power to the machine control elements and perform the following Periodic
Checkout Procedure.
Safety Mat System Periodic Checkout Procedure
Verify the functioning of the safety mat monitoring system periodically to ensure proper operation (see also the machine
manufacturer’s recommendations).
WARNING:
Checkouts for Multiple Safety Devices. If more than one safety mat is series-connected to one Safety
Mat Monitor Module, run this checkout procedure individually for each mat.
1. With the machine running, apply force to the mat’s sensing area, using a test piece as described in the mat
manufacturer’s literature, or the appropriate standard. Verify that the machine stops within the expected time period.
2. Remove the test piece from the safety mat. Verify that the machine does not restart.
3. Close and then open the Reset switch (if using Manual Reset mode). Verify that the machine cycle can be restarted by
normal initiation.
4. Repeat for each safety mat individually.
Troubleshooting
Use the LED display to help diagnose the problem. After fixing the fault:
•
Manual Reset configured — step ON and OFF the mat to clear the lockout.
•
Auto Reset configured — the outputs turn ON immediately.
The Fault LED turns OFF if the proper repair has been made.
Condition
Indicator Status
Possible Causes or Solution
Module will not reset
Power LED ON
Waiting for manual reset:
•
EDM monitoring contacts are not closed. Check MSCs.
•
Check jumper at S32-S35 (auto reset) or S32-S33 (manual reset).
•
Check reset button connection.
Fault LED OFF
Ch1 LED Flashing
Ch2 LED Flashing
No fault indicated
Power LED ON
Safety mat appears actuated:
•
Check mat for damage or heavy debris.
•
Check for proper wiring.
•
Check for a short in the wiring.
Fault LED OFF
Ch1 LED OFF
Ch2 LED OFF
MAX1524 and MAX2324 Safety Mat Monitoring Modules
P/N 122366 Rev. B
www.LARCO.com TEL: 800-523-6996
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