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Periodic checkout procedures – Banner MMD-TA-11B Muting Modules User Manual

Page 45

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P/N 116390 rev. C

43

Banner Engineering Corp.

Minneapolis, U.S.A.

www.bannerengineering.com • Tel: 763.544.3164

MMD-TA-11B / MMD-TA-12B Muting Module

Instruction Manual

Periodic Checkout Procedures

6. Apply power to the Module. Ensure that power to the

guarded machine is OFF. Verify that the external safety

systems are providing a Green/Go signal to the MSSI and

SSI inputs, and that the Green MSSI and SSI indicators (two

pairs of LEDs located near each terminal) are ON. When

configured for Manual Reset, the Yellow status indicator will

be flashing. Perform a manual reset (close the Reset switch

for 1/4 to 2 seconds, then open the switch). Verify that the

Green status indicator is ON steady.

NOTE: A Red flashing status indicator signifies a lockout

condition. Refer to Section 5 for information.

7. In a non-muted condition, generate a stop command from the

safeguarding device connected to the MSSI (e.g. interrupt

the defined area of a safety light screen). Verify that MSSI

Channel A and B and the Green status indicators go OFF. In

order, reset the safeguard and then the Module (in Manual

Reset).

8. Generate a stop command from the safeguarding device

connected to the SSI (e.g., actuate E-stop button). Verify

that SSI Channel A and B and the Green status indicators go

OFF. In order, reset the safeguard and then the Module (in

Manual Reset).

9. Apply power to the guarded machine and verify that the

machine does not start up. Generate a stop command from

the safeguarding device connected to the SSI and the MSSI

in a non-muted condition. Verify that it is not possible for

the guarded machine to be put into motion while either stop

commands are present. In order, reset the safeguard and

then the Module (in Manual Reset).

10. Initiate machine motion of the guarded machine and, while

it is moving, as in step #9 above, generate a stop command

from each safeguarding device. Do not attempt to insert

anything into the dangerous parts of the machine. Upon

issuing the stop command, the dangerous parts of the

machine should come to a stop with no apparent delay.

Upon reset of the safeguard and the Module, verify that the

machine does not automatically restart, and that the initiation

devices must be engaged to restart the machine.

11. Remove electrical power to the Module. All OSSD outputs

should immediately turn OFF, and should not be capable

of turning ON until power is re-applied and a reset is

accomplished.

12. Test the machine stopping response time, using an

instrument designed for that purpose, to verify that it is the

same or less than the overall system response time specified

by the machine manufacturer. (Banner’s Applications

Engineering Department may be able to recommend a

suitable instrument.)

Do not continue operation until the entire checkout

procedure is complete and all problems are corrected.

Muting Checkout

13. Verify that the Module has been reset and the Green status

indicator is ON. If the Yellow status indicator is flashing

(indicating the safety system that includes the MMD-TA-1..B

module is waiting for a reset of a latched condition), perform

a manual reset. At any time, if the Red status indicator

begins to flash, a lockout condition exists. Refer to Section

5.1 to determine the cause of the lockout.

During this procedure, at all times ensure that personnel are

not exposed to any hazard.
14. Mute the system by blocking (or activating) both mute

devices (typically M1−M2) simultaneously (within 3

seconds).

15. Verify that the Mute indicator comes ON. If not, check the

indicator and its wiring, verify that the mute enable input is

closed, and check the Diagnostic Display for error codes.

16. Generate a stop command from the safeguarding device

connected to the MSSI; verify the green MSSI channel

indicators are OFF and the Green status indicator is ON.

NOTE: If the Backdoor Timer feature has been selected, the

Diagnostic Display will begin to count down; otherwise a

flashing dash will appear on the display.

17. Clear or reset the safeguard (before the Backdoor Timer

expires) and verify the green MSSI channel indicators

are ON. Clear (deactivate) the mute devices before the

Backdoor Timer expires and verify the Mute indicator goes

OFF. The Green status indicator should remain ON.

18. Verify that it is not possible for a single individual to

initiate a mute condition by triggering the mute devices

(for example, by blocking both photoelectric beams or

actuating both switches) and access the hazard without

being detected and issuing a stop command to the machine

(where the green status indicator goes OFF, and a reset

of the latch condition is required). Do not expose any

individual to hazard while attempting to mute the system.

19. Verify that it is not possible for personnel to pass in front of,

behind, or next to the muted object without being detected

and without issuing a stop command to the machine.

20. If one-way (directional) muting has been selected, verify

that the system can not be muted by blocking (or activating)

M3−M4 before M1−M2. Do not expose any individual to

hazard while attempting to mute the system.

If any of these checks fail, do not attempt to use the safety

system that includes the MMD-TA-1..B module until the

reason for the failure(s) is identified and corrected.

This manual is related to the following products: