APC-SV4 and APC-SV8
Low Voltage Step / Vernier Controller
The APC-SV8 is a microcontroller-based step controller that provides precise modulation in multi-stage heater applications such as duct heaters. The built-in Vernier stage allows for smooth, precision control of the load without increasing switching wear.
Features:
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Utilizes Latest Microcontroller Technology
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RoHS Compliant
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Adjustable Stage Delay
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Pulsed or Analog Vernier output
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Adjustable Vernier ratio
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Expandable to 16 stages
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LIFO/FIFO selection
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Test Button
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Brown Out Protection
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Available in 4 or 8 stages
SPECIFICATIONS
Power Input
24VAC -15/+10%50/60Hz < 4VA. (24VAC -5%/+10% when using 0-135Ohm input)
Brown Out Protection
Stages restart from zero upon loss of power.
Command Inputs
0-5V, 0-10V, 4-20mA, 0-135R. Selectable via dipswitch.
Stages
Selectable from 1 to 16 stages via dipswitch. More than 8 stages requires an additional unit setup for slave operation.
Stage Outputs
​30 VAC @ 1.0A SPST Mechanical Relays w/MOV protection, up to a max of 5A total for all of the stages. Up to 8 stages per board.
Vernier Output
Current limited 24VDC Time Proportioned SSR drive or 0-5V Analog output for driving APCSCR control. Selectable via dipswitch # S1-6.
Slave Output
0-5V output for expanding beyond 8 stages.
Stage Output Modes
LIFO or FIFO Selectable via dipswitch.
Stage Delay
Adjustable from 0-180 seconds via potentiometer.
Vernier Ratio
Adjustable via potentiometer from 100 to 200%.
Stage Output Indication
Each Stage has a Red LED that is energized when the normally open relay output is closed.
Vernier Output Indication
Green LED that varies in intensity when analog mode is selected or blinks when time proportioning is selected.
Slave Output Indication
Yellow LED that varies in intensity when a slave output signal is present.
Test Button
Forces the command signal to 100% while pressed, thereby allowing test of all the stages at the selected stage delay rate.
I/O Connectors
0.250" Faston lugs for power and stage outputs, screw terminal blocks for low voltage I/O and command.
Ambient Temp. Range
0 to 80° C.
Board Specifications
7.075" x 2.700", RoHS compliant.
Shipping Weight
Approximately 1 lb.