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Chapter 6: Power Supplies
CHAPTER 6
POWER SUPPLIES
ISACC has four power supplies available from the PC board. They are there to power your
external sensors, solid state relays or output devices. Below are the specifications for these
power supplies:
Maximum Available Current
5V Supply 200mA
12V Supply 200mA
15V Supply 100mA
20V Supply 100mA
POWER
EG 24 24 BAT C 20V C 5 V C 12V C 5V C
AC AC
Power supply terminal block
The 5 Volt, 12 Volt, 15 Volt, and 20 Volt supplies are battery backed, but usage affects battery
backup time. The charge voltage at the BAT terminal is 20.4 Volts. Main power (24VAC) is
supplied through the two terminals labelled 24 and 24. The Earth Ground Terminal is labelled
EG.
NOTE: If you are using the ABS plastic enclosure, you must remove the top cover to access
the circuit board. After wiring is completed, reinstall the top cover. All wiring should be
properly fitted through the strain relief clamps. Strain relief is provided in the ISACC
enclosure to prevent wiring from being pulled from the circuit board or damaged while
passing through the enclosure. To use, thread wires through the clamp and clear rubber
bushing. Position the bushing in the clamp and tighten the screws on either side so that
the wiring does not move.
All wiring should comply with section 17 of the UL requirements.