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Datasheet
MULTI-BEAM 2-wire ac power block for MULTI-BEAM 2-wire modular photoelectric sensors
Figure 1. Model 2PBB
MULTI-BEAM 2-wire power block models 2PBA, 2PBB, and 2PBD contain a low
voltage power supply that uses a unique circuit to take a very small leakage current
through the load and convert it to the dc power required to run the scanner block
and logic module.
These power blocks also contain a solid-state switch that operates the load, and a
transient suppression circuit to prevent false operation from high voltage spikes on
the incoming line.
These power blocks are completely solid-state for unlimited operating life. Model
2PBR is a 4-wire power block that works with 2-wire scanner blocks and logic
modules and offers an SPST "hard" contact for switching heavy ac or dc loads.
NOTE: MULTI-BEAM 2-wire AC power blocks are color-coded
black.
Models
Operating
Voltage
Outputs Specifications Certifications
2PBA
105 to 130 V ac;
50/60 Hz
SPST solid-state switch, 3/4 amp
maximum (derated to 1/2 amp at
70 °C). 10 amps maximum inrush
for 1 second (non-repeating).
On-State Voltage Drop: Less than 10 V
Leakage Current: Less than 1 mA (resistive or
inductive loads)
2PBB
210 to 250 V ac;
50/60 Hz
2PBD
22 to 28 V ac;
50/60 Hz
N/A
2PBR
105 to 130 V ac;
50/60 Hz
SPST electromechanical relay
contact.
Contact Rating: 250 V ac max, 30 V dc max, 5
amps max (resistive load); install MOV across
contact if switching an ac inductive load.
Closure time: 20 ms
Release time: 20 ms
Maximum Switching Speed: 20 operations/
second
Mechanical Life: 10,000,000 operations
N/A
Wiring Diagrams
2PBA, 2PBB, and 2PBD Power Blocks
MULTI-BEAM 2-wire power blocks offer the ultimate in simplicity of sensor wiring. They wire directly in series with an ac
load, exactly like a limit switch. Response time of 2-wire power blocks is determined by the scanner block, whose response
time is 10 ms on/off. A built-in false pulse protection circuit holds the output OFF for 10 ms after power is initially applied
to the power block. MULTI-BEAM 2-wire power blocks will operate from –40 to 70 °C (–40 to 158 °F). Resistive loads must
be less than 15,000 ohms and inductive loads must be greater than 1.2 watts (10 mA).
NOTE: Output has a maximum load capacity of 3/4 A, a maximum resistive load of 15 kOhms, and a
minimum inductive load of 1.2 watts (10 mA).
MULTI-BEAM 2-Wire AC Power Block
Modules
Original Document
03508 Rev. A
14 March 2014
03508