Banner Safety Mat Monitoring Modules - Manual (Page 8)

To ensure proper operation, verify the quality and specifications of the mat being connected to this
Module, and perform periodic checks of the safety mat's resistance, as described in the Safety Mat
Initial Checkout.
Reset Switch Connection
The reset circuit switch can be any mechanical switch, such as a normally open momentary switch, or a two-position key switch. The
reset switch must be capable of reliably switching 12 to 30V dc at 20 to 50 milliamps. As shown in the hookup drawings, the reset switch
connects between Safety Module terminals S33 and S34.
The reset switch must be located outside of – and not be accessible from – the area of dangerous motion, and must be positioned so that
any area of dangerous motion may be observed by the switch operator during the reset procedure. See warning below.
WARNING: Reset Switch Location
All reset switches must be accessible only from outside, and in full view of, the hazardous area.
Reset switches must also be out of reach from within the safeguarded space, and must be protec-
ted against unauthorized or inadvertent operation (e.g., through the use of rings or guards). If any
areas are not visible from the reset switch(es), additional means of safeguarding must be provided. Fail-
ure to do so could result in serious bodily injury or death.
WARNING: Reset Routine Required
U.S. and international standards require that a reset routine be performed after clearing the cause of a
stop condition (e.g., arming an E-stop button, closing an interlocked guard, etc.). Allowing the machine
to restart without actuating the normal start command/device can create an unsafe condition
which could result in serious injury or death.
Automatic Reset Mode
The Safety Module may be configured (via hookup) for automatic reset. If no MSC contacts are monitored, install a jumper between
terminals S32 and S35 (see hookups). The Safety Module will reset (and its outputs energize) as soon as the switch returns to its armed
(closed-contact) position.
Automatic reset is useful for some automated processes. However, if automatic reset is used, it is necessary to provide a means of
preventing resumption of hazardous machine motion, until an alternate reset procedure is performed. The alternate procedure
must include a reset/restart switch, located outside the area of dangerous motion and positioned so that any area of dangerous motion
may be observed by the switch operator during the reset procedure. See Warning.
Connection to the Machine to be Controlled
The machine hookup diagram shows a generic connection of the Safety Module's redundant output circuits to the master stop control
elements (MSCs). An MSC is defined as an electrically powered device, external to the Safety Module, which stops the machinery being
controlled by immediately removing electrical power to the machine and (when necessary) by applying braking to dangerous motion. This
stopping action is accomplished by removing power to the actuator of either MSC.
Overvoltage Category II and III Installations (EN 50178 and IEC 60664-1)
The Safety Module is rated for Overvoltage Category III when voltages of 1V to 150V ac/dc are applied to the output relay contacts. It is
rated for Overvoltage Category II when voltages of 151V to 250V ac/dc are applied to the output relay contacts and no additional precau-
tions are taken to attenuate possible overvoltage situations in the supply voltage. The Module can be used in an Overvoltage Category III
environment (with voltages of 151V to 250V ac/dc) if care is taken either to reduce the level of electrical disturbances seen by the Module
to Overvoltage Category II levels by installing surge suppressor devices (e.g., arc suppressors), or to install extra external insulation in
order to isolate both the Safety Module and the user from the higher voltage levels of a Category III environment.
For Overvoltage Category III installations with applied voltages from 151V to 250V ac/dc applied to the output contact(s): the
Safety Module may be used under the conditions of a higher overvoltage category where appropriate overvoltage reduction is provided.
Appropriate methods include:
• An overvoltage protective device
SM-xA-5A Safety Mat Monitoring Modules
8 www.bannerengineering.com - tel: 763-544-3164 P/N 122364_Web
rev. C