3 Description of Controls
3-1 Access to Controls
5
3-1-3 Receiver Operating Mode Switch
The system can be set for three possible operating modes:
Details on operating mode set-up are given in the installation section.
3-1-4 Emitter and Receiver Code Switches
The infrared beam from a F3SS emitter must be set for one of four possible codes. The beam is coded to avoid
cross talk from adjacent units and improve immunity to weld flash and sources of ambient light.
Both the emitter and receiver must be set to the same code in order to “talk” with one another. See installation
section for switch setting details.
3-1-5 Safety Outputs
Two safety solid-state relay outputs are provided. Each output sources (PNP) up to 0.25 Amps at 24VDC.(volt-
age level varies with supply voltage)
3-1-6 Remote Start Switch (optional)
The Start switch is a normally closed, momentary switch that connects between the Start and Start Return ter-
minals of the receiver terminal block. A valid Start signal is a press and release of the switch. The receiver start
circuit applies about 5mA DC current through the switch contacts and a pulse of approximately 100mA, 20mS
when the switch contacts are initially closed.
- In Automatic Start mode a start switch is not required and the terminals can be left open.
- In Start Interlock and Start/Restart Interlock modes the start switch is required to exit Interlock. In all
modes, a Start switch can be used to reset an interlock caused by a fault, once the fault is removed.
Start/Restart Interlock
Upon power-up a start signal (press & release) is required before system can
enter normal operation. If the infrared beam is obstructed, the output relays will
not reset after a beam obstruction is removed until a start signal has been given
to the receiver. This is the mode most often used for perimeter guarding.
Start Interlock Mode
Upon power-up a start signal (press & release) is required before system can
enter normal operation. If the infrared beam is obstructed, the output relays will
reset after a beam obstruction is removed, without requiring a start signal.
Automatic Restart
Upon power-up the system will enter normal operation. If the infrared beam is
obstructed, the output relays will reset after a beam obstruction is removed, with-
out requiring a start signal.
Summary of Contents for F3SS
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