Manual

P/N 116390 rev. C 43
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: [phone]
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.