Panasonic SF2B Series Instruction Manual page 52

Beam synchronization using 4-core cable / When sufficient light is received
Sub sensor 3 (SF2B-□SL)
Sub sensor 2 (SF2B-□SL)
Main sensor 1 (this device)
Synchronization wire
52
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: Lights up in red, : Lights up in green,
Sub sensor 3 (SF2B-□SL): Light received status
<Emitter>
Beam-axis alignment
indicator
Operation indicator (Green)
Emission halt indicator
Sub sensor 2 (SF2B-□SL): Light blocked status
<Emitter>
Beam-axis alignment
indicator
Operation indicator (Green)
Emission halt indicator
Main sensor 1 (this device): Light received status
<Emitter>
Beam-axis alignment
indicator
Operation indicator (Green)
Emission halt indicator
Fault indicator
Setting indicator (Red)
© Panasonic Industrial Devices SUNX Co., Ltd. 2016
: Turns OFF
<Received>
Beam-axis alignment
indicator (Red)
OSSD indicator (Red)
Incident light intensity indicator (Green)
<Received>
Beam-axis alignment
indicator (Red)
OSSD indicator (Red)
Incident light intensity indicator
<Received>
Beam-axis alignment
indicator (Red)
OSSD indicator (Red)
Incident light intensity indicator (Green)
Fault indicator
Digital error indicator
(Red)