System Installation
MM-TA-12B Muting Module
Instruction Manual
WARNING . . .
Verify Proper
Operation
The MM-TA-12B Muting Module
and safety systems can do the job
for which it was designed only if it
and the machine it guards are oper-
ating properly, both separately and
together.
It is the user’s responsi-
bility to verify proper operation, on
a regular basis, as instructed in
Section 6.
If the MM-TA-12B Muting Module,
safety systems, and the guarded
machine do not perform exactly as
outlined in the checkout proce-
dures, the cause of the problem
must be found and corrected
before the system is put back into
service.
Failure to correct such problems
can result in serious bodily injury
or death.
WARNING . . .
Power Failures
Power failures or other
Module lockout conditions should
always be investigated immediate-
ly by a Qualified Person. A lockout
is a definite indication of a prob-
lem and should be investigated at
once. Attempts to continue to
operate machinery by bypassing
the Module are dangerous and
could result in serious bodily
injury or death.
4. Operating Instructions
4.1 Security Protocol
The Module should be mounted inside a lockable enclosure in order to prevent
access by unauthorized personnel, if required by applicable standards.
The key (or combination) to the enclosure should be kept in the possession of a
Qualified Person and only they should have access to the configuration switches.
A Qualified Person is defined as an individual who, by possession of a recognized
degree or certificate of professional training, or who, by extensive knowledge,
training, and experience, has successfully demonstrated the ability to solve prob-
lems relating to the subject matter and work.
4.2 Periodic Checkout Requirements
In addition to the checkouts that are performed by a Qualified Person or persons
at the time that the Module is installed and put into service, the functioning of the
safeguarding and the machine must be verified on a regular periodic basis to
ensure proper operation. This is absolutely vital and necessary. Failure to ensure
proper operation can lead to serious injury or death.
See Section 6 for checkout schedules and procedures.
4.3 Normal Operation
During normal operation, the Module’s three status indicators (red, green and
yellow) are as shown in Figure 4-1. In addition, green indicators adjacent to each
of the Module’s inputs/interfaces come ON to verify an active state of that circuit.
During normal operation, the Diagnostic Display will read “—” (solid or, if during
the mute cycle, flashing). Any number that appears in the Display signifies an
error; see Section 5.2 for more information.
See Section 3.5.1 for information on the reset routine.
= Steady
= Flashing
Waiting
for Reset
Latched
Output ON
Override
Lockout
ON
OFF
1
2
3
4
Figure 4-1. Muting Module Status Indicator conditions (see Figure 1-2)
Note: GREEN indicators
are provided for
each of the inputs
to verify an active
state (i.e. closed =
ON). A single indi-
cator is provided
for the Reset Input
and for each of the
Mute Device
inputs (M1 - M4).
A green indicator
is provided for
each channel for
the MSSI, and the
USSI, and the
OVERRIDE input.
Red
Green
Yellow
Off
Off
Flashing
Off
Off
On
Off
On
Off
On
On
Off
Flashing
Off
Off
Waiting
for Reset
Latched
Output ON
Override
Latched
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