WARNING:
•
Interfacing both output signal switching devices (OSSD)
•
Failure to follow these instructions could result in serious injury or death.
•
Unless the same degree of safety is maintained, never wire an intermediate device(s) (PLC, PES,
PC) between the safety module outputs and the master stop control element it switches such that
a failure causes a loss of the safety stop command or the failure allows the safety function to be
suspended, overridden, or defeated.
•
Connect both OSSD outputs to the machine control so that the machine’s safety-related control
system interrupts the circuit to the machine primary control element(s), resulting in a non-
hazardous condition.
WARNING:
•
OSSD Interfacing
•
Failure to properly interface the OSSD Outputs to the guarded machine could result in serious
injury or death.
•
To ensure proper operation, the Banner device output parameters and machine input parameters
must be considered when interfacing the Banner device OSSD outputs to machine inputs. Design
machine control circuitry so that all of the following are true:
The maximum load resistance value is not exceeded.
The maximum specified OSSD OFF-state voltage does not result in an ON condition.
External device monitoring (EDM) is a function used to monitor the state of the external, positively guided (mechanically
linked) machine control contacts (FSDs and/or MPCEs). The S4B System does not include the EDM function. As a result, the
S4B System should be used with an external safety monitoring device that monitors the status of the two S4B OSSDs and is
capable of providing the EDM function. Examples of appropriate external safety monitoring devices include Banner XS/SC26
Safety Controllers, SC10-2roe Safety Controller, Banner UM-FA-9A and UM-FA-11A Universal Input Safety Modules, and
Safety PLCs.
+24 V dc
MPCE 1
SO1
MPCE1
Light Curtain
EDM
Safety Controller
MPCE 2
MPCE2
OSSD1 OSSD2
+24 V dc
MPCE 1
SO1
MPCE1
Light Curtain
EDM EDM
Safety Controller
MPCE 2
MPCE2
OSSD1 OSSD2
Single-channel EDM used to monitor both MPCE feedback
signals. If one or both channels do not close, the system
enters a Lockout condition.
Dual-channel EDM used to monitor both MPCE feedback
signals. If the channels are not in the same state, the system
enters a Lockout condition.
WARNING:
•
The S4B does not have external device monitoring (EDM).
•
If EDM is required for the application, it must be implemented in the external control.
6.5.2 Preparing for System Operation
After the initial trip test has been accomplished, and the OSSD safety outputs connections have been made to the external
control device, the S4B is ready for testing in combination with the guarded machine.
The operation of the S4B with the guarded machine must be verified before the combined System and machine may be put
into service. To do this, a Qualified Person must perform the Commissioning Checkout Procedure. See
S4B Safety Light Curtain
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