Introduction; Overview - Banner MMD-TA-11B Instruction Manual

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

1. Overview

1.1 Introduction

The Banner MMD-TA-11B / MMD-TA-12B Muting Module (the
Module) is an accessory component of a safeguarding system,
which may incorporate such primary safeguards as safety light
screens, safety interlocked gates/guards, or other presence-
sensing safeguarding devices (PSSDs). The Module allows the
machine to mute the primary safeguard by monitoring redundant
inputs (two or four) and automatically suspend the safeguarding
function of a safeguarding device during the non-hazardous
portion of the machine cycle.
In this manual, the term "muting" refers to the automatic
suspension of the safeguarding function of the primary safety
device during a non-hazardous portion of the machine cycle
where personnel are not exposed to harm.
Safety Light Screen
Defined Area
Figure 1-1. Block diagram of a safeguarding system employing the Muting Module and a safety light screen (user-supplied) as a
primary safety device
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The muting function allows material to be manually or
automatically fed into or removed from a machine process,
without tripping the primary safeguard. The Module accomplishes
this by using diverse-redundant microprocessors that monitor the
status of inputs and outputs, so that a single fault will cause the
Module to issue a stop command to the machine. The Module,
like all Banner safety products, is extensively FMEA (Failure
Mode and Effects Analysis) tested to establish an extremely high
degree of confidence that no internal component will, even if it
does fail, cause a failure to danger. This design philosophy aids
machine designers to comply with U.S. control reliability and
worldwide standards for the highest level of safety.
Safety Light
Screen Control
FSD2/OSSD2
CH B
FSD1/OSSD1
CH A
+24V dc
0V dc
GND
Mute Devices
M1, M2, M3, M4
MMD-TA-..
Muting Module
MSSI
Machine
Interface
Override Reset AUX*
SSI
* Model MMD-TA-11B: These are relay contact outputs
Model MMD-TA-12B: This is a solid-state output
Overview
+24V dc
0V dc
OSSD1*
OSSD2*
EDM1
EDM2
Mute
Enable
Mute
Lamp