Banner MM-TA-12B Instruction Manual page 45

MM-TA-12B Muting Module
Instruction Manual
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14) 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
15) Verify that the MM-TA-12B Module has been reset and the Green status indi-
cator is ON. If the Yellow status indicator is flashing (indicating the
MM-TA-12B system 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 lock-
out condition exists. Refer to Section 5.1 to determine the cause of the lock-
out.
During this procedure, at all times ensure that personnel are not exposed to
any hazard.
16) Mute the system by blocking (or activating) both mute devices (typically M1-
M2) simultaneously (within 3 seconds).
17) 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.
18) 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 30- or 60-second Backdoor Timer feature has been selected, the
Diagnostic Display will begin to count down; otherwise a flashing dash will
appear on the display.
19) 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.
20) 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 sta-
tus 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.
21) 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 com-
mand to the machine.
22) 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 system until the reason
for the failure(s) is identified and corrected.
Periodic Checkout Procedures