UM-FA-11A BANNER ENGINEERING, UM-FA-11A Datasheet - Page 12

• Manufacturer Part Number: UM-FA-11A
• Description: SAFETY RELAY UM-FA-11A 22.5MM UNVRSL MODULE CNTCT/SLD ST IN 2NO & 1NC OU
• Manufacturer: BANNER ENGINEERING

NOTE: The minimum amount of time required for the Module to be in a STOP or OFF condition is 250 ms. This
“recovery time” (OFF-state) is required for the internal circuitry of the Safety Module to normalize, allowing a reliable
reset to occur. A lockout will occur if the Module is cycled too quickly. To clear the lockout, re-cycle the Module,
meeting the minimum OFF time requirements.
Connection to the Machine to be Controlled
The machine control hookup diagrams show a generic connection of the Safety Module's redundant output circuits
to the 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 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
S33-S34 in Auto Reset mode and to S11-S33 in Manual Reset mode (see Figures 4, 5, 6, and 7).
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 as shown on Figures 4, 5, 6, and 7. 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.
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 precautions 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 output contact voltage 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:
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, Wiring of Arc Suppressors).
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An overvoltage protective device
A transformer with isolated windings
A distribution system with a multiplicity of 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
Banner Engineering Corp. - Minneapolis, MN
USA - Tel: [phone]
UM-FA-9A/-11A Universal Module
P/N 141249 rev. C