Banner MULTI-BEAM Series User Manual

Page 3

V ac

(See specifications)

Load

2PBA
2PBB
2PBD

Figure 5. 2-Wire MULTI-BEAM with Series Contacts

V ac

(See specifications)

Load

2PBA
2PBB
2PBD

Figure 6. 2-Wire MULTI-BEAM with Parallel Contacts

When 2-wire MULTI-BEAM sensors are connector in series with
mechanical switch or relay contacts, the sensor receives power
to operate only when all the contacts are closed. The false-
pulse protection circuit of the MULTI-BEAM causes a 0.1 second
delay between the time that the last contact closes and the
time that the load energizes.

Two-wire MULTI-BEAM sensors may be wired in parallel with
mechanical switch or relay contacts. The load energizes when any of
the contacts close or the sensor output is energized. When a contact
is closed, it shunts the operating current away from the MULTI-
BEAM. As a result, when all the contacts are open, the MULTI-
BEAM's 0.1 second power-up delay may cause a momentary drop-
out of the load.

V ac

(See specifications)

1CR

2PBA
2PBB
2PBD

Latch

1CR Reset

Figure 7. Photoelectric Latch with Manual Reset

V ac

(See specifications)

2PBA
2PBB
2PBD

PLC

Inputs

1
2
3
4
5
6
7
8

neutral

(ac neutral)

(ac “hot”)

Wiring is typical
for all 8 inputs

Figure 8. 2-Wire MULTI-BEAM to Programmable Logic Controller

(PLC)

The 1CR relay will latch "on" whenever the 2-wire MULTI-BEAM
output is energized. The 1CR is reset when the normally-closed
button switch is pressed.

MULTI-BEAM 2-wire sensors operate with very low (1 mA) off-state
leakage current. As a result, they will interface directly to most PLCs
without needing an artificial load resistor. If the off-state voltage (1
mA × the input resistance of the PLC) is higher than the PLC sensing
threshold, install a 10 kOhm to 15 kOhm, 5-watt resistor for each 2-
wire sensor. The resistor connects between the input terminal and ac
neutral.

If you have a question about wiring a specific brand of PLC, contact
the Banner Applications Department during normal business hours.

MULTI-BEAM 2-Wire AC Power Block Modules

P/N 03508 Rev. A