Safety mat module initial checkout procedure – Banner Safety Mat Monitoring Modules User Manual

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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
• A transformer with isolated windings
• A distribution system with multiple branch circuits (capable of diverting energy of surges)
• A capacitance capable of absorbing energy of surges
• A resistance or similar damping device capable of dissipating the energy of surges

When switching inductive ac loads, it is good practice to protect the Safety Module outputs by installing appropriately-sized arc suppressors. However, if arc suppressors
are used, they must be installed across the load being switched (e. g., across the coils of external safety relays), and never across the Safety Module’s output contacts (see
WARNING, Arc Suppressors).

External Device Monitoring

To satisfy the requirements of Control Reliability (OSHA and ANSI), Category 3 and 4 of ISO 13849-1 (EN 954-1), the Master Stop Control Elements (MSCs) must each
offer a normally closed, forced-guided (mechanically linked) monitor contact. Connect one normally closed monitor contact from each master stop control element in series
to S31 and S32.

In operation, if one of the switching contacts of either MSC fails in the energized condition, the associated monitor contact will remain open. Therefore, it will not be possible
to reset the Safety Module. If no MSC-monitor contacts are monitored, a jumper must be installed between terminals S31-S32, as shown in the hookup drawings. It is the
user's responsibility to ensure that any single failure will not result in a hazardous condition and will prevent a successive machine cycle.

Auxiliary Monitor Contact/Solid-State Monitor Outputs Connection

The action of the auxiliary monitor contact, terminals 51-52, inversely "follows" the action of the safety outputs. Two additional solid-state monitor outputs (at terminals Y32
and Y35) each are capable of switching up to 100 mA at 12- 24V dc. The output at terminal Y32 follows the action of the output circuits (K1 and K2); the output at terminal
Y35 opens (low signal) when there is a loss of power or a fault is detected. These outputs are to be used only for nonsafety functions (typically, to communicate the status
of the Safety Module to a programmable logic controller). See the appropriate figure for hookup information.

WARNING: Wiring of Arc Suppressors

If arc suppressors are used, they MUST be installed as shown across the actuator coil of the stop control elements (MSCs or
MPCEs). NEVER install suppressors directly across the output contacts of the Safety Device or Module. It is possible for
suppressors to fail as a short circuit. If installed directly across the output contacts, a short-circuited suppressor will create an
unsafe condition which could result in serious injury or death.

WARNING: Interfacing MSCs

NEVER wire an intermediate device(s) (e.g., PLC, PES, PC) between the Safety Module outputs and the Master Stop Control Ele-
ment it switches in such a manner that in the event of a failure there is a loss of the safety stop command, OR in such a manner that
the safety function can be suspended, overridden, or defeated, unless accomplished with the same or greater degree of safety.

Whenever forced-guided, mechanically linked relays are added as intermediate switching devices, a normally closed forced-guided
monitor contact from each relay must be added to the series feedback loop between Safety Module terminals S31 and S32.

Safety Mat Module Initial Checkout Procedure

WARNING:

Checkouts for Multiple Safety Devices. If more than one safety mat is series-connected to one Safety Mat Monitor Module, run this
checkout procedure individually for each mat.

CAUTION: Disconnect Power Prior to Checkout

Before performing the initial checkout procedure, make certain all power is disconnected from the machine to be control-
led.

Dangerous voltages may be present along the Safety Module wiring barriers whenever power to the machine control elements is ON.
Exercise extreme caution whenever machine control power is or may be present. Always disconnect power to the machine
control elements before opening the enclosure housing of the Safety Module.

SM-xA-5A Safety Mat Monitoring Modules

P/N 122364 rev. C