tained photoelectric switches. Each MULTI-BEAM consists of

three components: scanner block, power block, and logic module.

The scanner block contains the complete modulated photoelectric

amplifier as well as the emitter and receiver optoelements. It also

contains the sensing optics and the housing for the other two

modules. The power block provides the interface between the

scanner block and the external circuit. It contains a power supply

for the MULTI-BEAM plus a switching device to interface the

circuit to be controlled. The logic module interconnects the power

block and scanner block both electrically and mechanically. It

provides the desired timing logic function (if any), plus the ability

to program the output for either light- or dark-operate. The

emitters of MULTI-BEAM emitter-receiver pairs do not require

a logic module. Emitter scanner blocks are supplied with a blade-

pin to interconnect the scanner block and power block. This

modular design, with field-replaceable power block and logic

module, permits over 5,000 sensor configurations, resulting in

exactly the right sensor for any photoelectric application.

There are two families of MULTI-BEAM sensors: 3- and 4-wire,

and 2-wire. Three- and four-wire MULTI-BEAMs offer the

greatest selection of sensor configurations. They permit either ac

or dc operation and offer the fastest response times and the

greatest sensing ranges. Two-wire MULTI-BEAMs are used in

ac-powered applications where simplicity and convenience of

wiring are important. They are physically and electrically inter-

changeable with heavy-duty limit switches.

The circuitry of all MULTI-BEAM components is encapsulated

meet or exceed NEMA 1, 3, 12, and 13 ratings. Most MULTI-

BEAM scanner blocks include Banner's patented Alignment

Indicating Device (AID™) which lights a top-mounted LED

when the sensor sees its own modulated light source and pulses

the LED at a rate proportional to the received light signal. Most

MULTI-BEAM sensor assemblies are UL listed and certified by

CSA (see power block listings). All MULTI-BEAM components

(except power block models 2PBR and 2PBR2) are totally solid-

state for unlimited life.

Composite Functional Schematic, 3- and 4-wire Sensors

®

MULTI-BEAM Sensors

LR41887

E71083