Banner ES-UA-5A Instruction page 8

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 ac-
tuating 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, which is 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 diagrams show 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.
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 Machine Primary Control Elements (MPCEs) must each offer a normally closed, forced-guided (mechanically
linked) monitor contact. Connect one normally closed monitor contact from each Machine Primary Control Element
as shown in the appropriate hookup drawing.
In operation, if one of the switching contacts of either MPCE fails in the energized condition, the associated monitor
contact will remain open. Therefore, it will not be possible to reset the Primary Safety Device. If no MPCE-monitor
contacts are monitored, it is the user's responsibility to ensure that any single failure will not result in a haz-
ardous condition and will prevent a successive machine cycle.
8 Banner Engineering Corp. - Minneapolis, MN USA - www.bannerengineering.com
ES-UA-5A and ES-VA-5A E-Stop Safety Modules
Tel: 763.544.3164
P/N 122365 rev. C