Honeywell SYA14 Series Manual page 129

However, the FF-SB14, FF-SB15 and FF-SB30 low voltage light curtains are polarity
independent.
The wire gauge of the ground connection should be equal to the power supply wire gauge.
The length of the ground connection wire should be as short as possible. To minimize noise
interference, the ground terminal of the light curtain must be connected to the main ground of
the machine.
Figure 3-3 Connections for Receivers
Receiver
A1, A2: 1 Normally Closed (NC) safety contact
B1, B2 and C1, C2: 2 Normally Open (NO) safety contacts
A3, C5: Beam status, A3 is internally connected to the 0 V when the beams are unobstructed
(NPN output), I = 5 to 20 mA, 30 VDC max.
C3, C5: Restarts the safety light curtain and monitors the external relays.
48 Honeywell • MICRO SWITCH Sensing and Control
Not
Connected
Earth Ground
FF-SB Series Installation Manual
Connector Pinout
Earth Ground
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