PAB 20 Series0 pages

PHOTOELECTRIC AMPLIFIER BUS SERIES

PAB 20

Description
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Operation mode and max sensing range:
Thru-beam: 0-47 m
Diffuse proximity: 0-2,6 m
10-30 V dc and 24 V ac supply voltage
Manual sensitivity adjustment
Sensor LED-drive
Automatic sensor test
Adjustable on/off time delay
2 relay or 2 transistor outputs
Switch selectable light or dark function
Switch selectable long or short range
Test input
Power, output, alarm, signal level and master/slave
address indicators
Alarm output
DIN rail mounting with bus function

The PAB 20 is a 2-channel, multiplexed, photoelectric amplifier, which is

on the DIN rail, to form a modular master/slave system with up to a total

to be used in conjunction with 2 sets of remote transmitters LT and

of 29 channels. The bus connection enables communication between the

receivers LR from the series 100, 110 and 120. The 2 channels operate

amplifiers, which allows the channels of all the amplifiers to be multiplexed

independently of each other with their own set of remote transmitter and

ensuring that optical cross talk between channels is prevented and allows

receiver. The multiplexing function ensures that optical cross talk between

a common output from the amplifier modules. Both the PAB 20 A and

channels is prevented.

PAB 20 S can share power supply via the bus connection.

This amplifier series offers manual sensitivity adjustment, for each

The amplifier offers a test input, which is used for either disabling

individual channel, via an integral potentiometer located on the front panel

or enabling the transmitting power temporarily for test purposes.

of the amplifier. The series offers a choice between 2 individual relay or 2

The amplifier includes an alarm output, which is used to indicate if the

individual transistor outputs, with an adjustable 0-10 sec on/off time

signal level is insufficient or if a sensor is faulty. The sensor LED drive

delay. Light or dark function and long or short range are switch selectable.

powers the optional monitor LEDs available on the remote sensors –

The amplifiers from the PAB 20 A series can be connected together with

output (LT) and power (LR).

up to 9 amplifiers from the PAB series via a bus rail connector positioned

Technical Data
Supply voltage
Voltage tolerance

10-30 V dc or 24 V ac
ac

+/– 10 %

Current consumption
Output

Max. 2,3 W
Relay

250 V ac / 3 A, 120 V ac / 5A

Transistor
Alarm output

30 V dc / 100 mA

Transistor

30 V dc / 100 mA

Power on indicator

Green LED

Output indicator

Yellow LED

Signal level indicator

Green LED

Alarm indicator

Red / yellow LED

LR sensor failure indicator

Yellow LED

LT sensor failure indicator

Red LED

Master/slave address indicator

PAB 20 A

Green / orange LED
Green monitor LED on receiver indicates ‘Power ON’
Yellow monitor LED on the transmitter indicates ‘PAB output activated’

Sensor monitor LED drive
Hysteresis

Approx. 35 %
Relay

Short range

17 Hz

Long range

Operation frequency
Transistor

9 Hz

Short range

28 Hz

Long range

33 ms / 26 ms

Long range

Relay
Response time tON / tOFF

11 Hz

Short range

60 ms / 53 ms
18 ms / 18 ms

Long range

Transistor

Short range

45 ms / 45 ms

Delay tON / tOFF

0-10 sec, adjustable

Housing material

Polyamide

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