Chapter 2: Installation

primary secondary

120VAC

supply

20 - 24 VAC

1.5A

transformer

EG 24 24 BAT C 20V C 15V C 12V C 5V C AC AC

POWER

Wiring an AC power supply to ISACC

DC supply requirements:

1.The voltage range for powering ISACC is 24 to 28VDC. If the voltage is lower than 24VDC, the batteries will not fully charge. If the voltage is over 28VDC, excess heat will be generated in the power supply and components may fail.

2.The DC supply should be able to provide a minimum of 1.5 Amp at the required voltage.

3.The negative terminal on the DC supply must be either floating or connected to "Earth Ground." If it is not, you will create a ground differential between ISACC, your computer, and your sensors that may seriously damage these devices.

4.The positive terminal should have a 1.5 Amp Slo Blo fuse in-line between the supply and ISACC. This is required because the fuse on the circuit board will be bypassed with the new wiring.

DC supply connections:

1.Connect the negative wire from the DC supply to one of the common terminals on the POWER terminal block.

2.Connect the positive wire from the DC supply (with the in-line fuse) to the termi- nal marked 24AC that is directly to the right of the EG terminal.

See diagram next page.

24 -32VDC

+

1.5Amp fuse

EG 24 24 AC AC

power supply

-

BAT C 20V C 15V C 12V C 5V C

POWER

Wiring a DC power supply to ISACC

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Phonetics 5000, 5100 manual DC supply requirements

5000, 5100 specifications

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