Manual

POWER SUPPLY REQUIREMENT: 12-18V dc at less than 100mA,
exclusive of load.
OPERATING TEMPERATURE RANGE: 0 to +50°C (+32 to +122° F).
MAXIMUM SENSOR LEAD LENGTH: 100 feet (30m) maximum;
use separate shielded cables for emitter and reciever.
OUTPUT CONFIGURATION: open collector NPN transistor; maximum
on-state current 250mA, maximum off-state leakage current 100 micro-
RESPONSE SPEED: 1 millisecond ON and OFF.
LR250 & PT250
Opposed Mode
Remote Sensor Pair
Specications, MB Series Ampliers
Banner remote sensors will connect to any MB Series amplier. The model
MRB chassis (shown) has octal sockets for the amplier and a BR-2 relay
(supplied) and provides power for the sensors and amplier. Up to four sen-
sor pairs may be connected to one amplier for light-operated OR or dark
operated AND operation. In multiple-sensor hookups, receivers are wired
in parallel and emitters are connected in series (see example for CM Series
modules, next page).
Several MB Series ampliers are available. Each provides a different output
logic function. Chassis models with additional octal sockets are also avail-
able. Other types of output devices, including solid state relays, may be
ordered (see Banner catalog).
Hookup to MB Series Ampliers
The LR250 emitter and PT250 receiver are compact, totally-encapsulated opposed mode remote sensors whose 1/4" diameter smooth
barrel design and excellent operating characteristics make them ideal for many sensing applications. Mounting and alignment are
extremely simple, due to these sensors' wide eld of view. The LR250 and PT250 may be mounted through a 1/4" (6,4mm) clearance
hole and held in place by a setscrew, or in a model SMB250 mounting block.
LR/PT250 series sensors are fully encapsulated, and have hermetically sealed lenses to eliminate internal condensation. Units may
be washed down without damage. Identical optical performance in different housing styles is available in models LR/PT200, 300, and
400 (see Banner product catalog).
The minimum object size required to break the beam of the LR250/PT250 opposed mode sensor pair is 1/8-inch. These sensors are
designed for use with Banner MICRO-AMP
®
system MA3-4 and MA3-4P modulated ampliers, MAXI-AMP™ system CM Series
modulated ampliers, and MB Series ampliers.
BEAM PATTERNEXCESS GAIN CURVE
Printed in USA
P/N 03389C4B
1) Avoid running remote sensor cables in wireways together with
power-carrying conductors.
2) Avoid running remote sensor cables through areas of known ex-
treme electrical interference (electrical "noise").
3) Always use shielded cables and only connect the shield ("drain")
wire at the amplier.
4) When splicing, never combine emitter and receiver wires into a
common cable. (The result will be electrical "crosstalk" within the
cable, which causes a "lock-on" condition of the amplier.)
Wiring rules:
RANGE: up to 8 feet in opposed mode (see gain curve)
EFFECTIVE BEAM: 0.14 inch (3.6 mm) diameter
RESPONSE SPEED: a function of the amplier (see below)
OPERATING TEMPERATURE: -40 to +100° C (-40 to +212° F)
EMITTER CHARACTERISTICS (LR250): infrared LED,
880nm
CONSTRUCTION: totally encapsulated, hermetically sealed lenses.
Delrin
®
housing; NEMA 1, 3, 4, 12, and 13.
CABLE: sensors are supplied with 6' of PVC-covered cable.
30' cables are available by special order.
Specications, LR250 & PT250