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System Installation
3.6 Machine Interface Connection – Initial Hookup and Checkout
The machine interface connector provides connection for supply power (+24V dc,
0V dc, and GND), mute enable (ME), external device monitoring (EDM #1 and
EDM #2), and the safety outputs (OSSD #1 and OSSD #2).
Ensure that power has been removed from machine or ensure that power is not
available to the machine controls or actuators, and ensure that the machine con-
trol (MPCEs) are not connected to or controlled by the OSSD safety outputs at
this time. Permanent connections will be made after MM-TA-12B Muting Module
initial checkout (see Section 3.7).
Verifying System Operation
The initial checkout procedure must be performed by a Qualified Person (see
WARNING, page 14). It must be performed only after configuring the MM-TA-
12B Muting Module and after properly installing and configuring the safety sys-
tems connected to its MSSI and the USSI inputs (per Section 3).
The initial checkout procedure is performed on two occasions:
• To ensure proper installation when the System is first installed, and
• To ensure proper System function whenever any maintenance or modification is
performed on the System or on the machinery being guarded by the System.
(See Section 6.1 for a schedule of required checkouts.)
For the initial checkout, the MM-TA-12B Muting Module and associated safety sys-
tems must be checked without power being available to the guarded machine. Final
interface connections to the guarded machine cannot take place until these sys-
tems have been checked out.
Verify that:
• Power has been removed from (or is not available to) the guarded machine, its
controls or actuators;
• The machine control circuit is not connected to the OSSD outputs at this time
(permanent connections will be made following this initial checkout), and that the
OSSD leads are isolated (i.e. not shorted together, not shorted to power or
ground);
• EDM has been configured for No Monitoring (SW4 = ON, per Figure 3-2) and
EDM#1 and EDM#2 are not connected (i.e., pins 2 and 3 left open);
• Depending on the application, it also may be necessary to temporarily disable
Mute Enable (SW6 = ON, see Figure 3-2) to check out the muting function with-
out the machine being operational;
• Other than EDM and Mute Enable, verify proper DIP switch configuration of
MM-TA-12B; and
• All input connections have been made per appropriate sections for the Mute Input
Devices (M1 – M4), USSI, MSSI, Manual Reset Switch, Mute Lamp, Aux Output,
and Override Input.
This will allow the MM-TA-12B Muting Module and the associated safety systems
to be checked out, by themselves, before permanent connections are made to the
guarded machine.
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MM-TA-12B Muting Module
Instruction Manual
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