Introduction; Overview - Banner MM-TA-12B Instruction Manual

MM-TA-12B Muting Module
Instruction Manual
Safety Light Screen
Defined Area
Figure 1-1. Block diagram of a safeguarding system employing the MM-TA-12B Muting Module and a safety light screen (user-
supplied) as a primary safety device
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1. Introduction

1.1 Overview

The Banner MM-TA-12B Muting Module is an accessory component of a safeguard-
ing 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 moni-
toring 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 safe-
guarding function of the primary safety device during a non-hazardous portion of
the machine cycle. (During the non-hazardous portion of the machine cycle, person-
nel are not exposed to harm.)
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 +24V dc
0V dc 0V dc
GND GND
Mute Devices
M1, M2, M3, M4
MM-TA-12B
Muting Module
Machine
MSSI
Interface
Override Reset AUX Mute
USSI

Introduction

+24V dc
0V dc
GND
OSSD1
OSSD2
EDM1
EDM2
Mute
Enable
Lamp