Banner MULTI-BEAM Series - Manual (Page 18)

Functional Schematics
Low Voltage
Sonalert
-
+
L2 L1
V ac
1 2
3 4
PBAM
PBOB
PBO
Model PBAM is a special-purpose power block that is powered by 120V ac, and provides a low level source
of dc output voltage when the sensor's output is energized. It is used primarily to power low voltage audio
tone annunciators such as "SONALERTS". The PBAM may also provide a signal to many types of logic
devices. The output is approximately 8V dc when energized, and the output impedance is 1K ohm (short
circuit proof). The output is totally isolated from the ac supply voltage, and may be used to provide an input
signal to many line-powered or battery-powered electronic totalizers.
Input: 105 to 130V ac, 50/60Hz.
Output: 8Vdc at 8mA maximum (short
circuit proof).
Input: 210 to 250V ac, 50/60Hz.
Input: 105 to 130V ac, 50/60Hz.
These power blocks are designed to interface an electronic circuit (or control) at a low dc voltage level, but
where there is no dc supply voltage available to power the MULTI-BEAM. Since the output is isolated
it may be wired to either source or sink current, and multiple units may be wired in either series or parallel.
The output of model PBO or PBOB will directly interface Banner component system logic modules. The
low on-state saturation voltage allows direct interfacing to most solid-state low voltage dc logic systems
or electronic totalizers.
Note: the 1-volt saturation prevents direct interfacing to 5-volt logic systems like TTL. For these low-
voltage interfaces, use instead special order power block model PBOL or PBOBL.
PBBT
Input: 210 to 250V ac, 50/60Hz.
Output: SPST isolated solid-state switch;
100mA maximum (no inrush capacity),
350V dc max., 250V ac max.
On-state voltage drop: less than 3 volts at full
load.
Off-state leakage current: less than
100 microamps.
PBAT
Input: 105 to 130V ac, 50/60Hz.
Output: SPST isolated solid-state switch;
100mA maximum (no inrush capacity),
200V dc max., 140V ac max.
On-state voltage drop: less than 3 volts at full
load.
Off-state leakage current: less than
100 microamps.
MULTI-BEAM
3- & 4-wire AC Power Blocks
I f you are unable to find the power
block for your interface, contact
the Banner Application Engineer-
ing Department during normal
business hours at (612) 544-3164.
Output: SPST isolated optically coupled
transistor switch (will switch dc only); 50mA
maximum, 30V dc max.
On-state saturation voltage: less than 1 volt at
2mA, less than 1.3 volts at 50mA.
Off-state leakage current: less than 10
microamps.
L2 L1
V ac
(See Specifications)
1 2
3 4
V ac/dc
LOAD
V dc
L2 L1
V ac
(See Specifications)
1 2
3 4
+
LOAD
AC Models Connections
Power block models PBAT and PBBT have an isolated solid-state output switch which may be used
to switch either ac or dc. The switch is rated at 100mA maximum, and there is no capacity for inrush.
As a result, these power blocks usually should not be used to switch ac inductive loads. However,
100mA is enough capacity to switch many inductive dc loads like small relays and solenoids. Models
PBAT and PBBT interface directly to all ac programmable controller inputs.
Since the saturation voltage of these power blocks is typically greater than 1 volt, they should not be
used to interface 5V dc logic circuits like TTL. Instead, use special order model PBOL or PBOBL.
NOTE:
add 8.3 milliseconds to the off-time response of the scanner block.
18