Innotech Omni C14, Installation Instructions Manual

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Omni Installation Instructions
Page 78 © Mass Electronics Pty Ltd 2017 Edition 1.2 dated 20.08.2018
Check 24VAC and 24VDC inputs as follows:
1. Ensure power to the device is turned off.
2. For 24VAC connection, ensure the AC Neutral is connected to Terminal 2 and the resistance between
Terminal 2 and the enclosure’s main earth link is 3.0 Ohms, or less.
3. Disconnect the power lead from Terminal 1.
4. Connect a digital volt-ohm-meter red (+) test lead to the disconnected power lead and the black (-)
test lead to Terminal 2.
5. Set the voltmeter to the VAC range to measure 24 Volts.
6. Turn on the power.
7. The voltmeter should read 24 Volts ±10%. For 24VDC units, make sure the power lead going to
Terminal 1 is positive and Terminal 2 is negative (although Omni devices are not polarity conscious).
8. Ensure measurement is in DC and not AC voltage.
9. Turn off the power.
10. Disconnect the digital voltmeter and reconnect the wire to Terminal 1.
11. Repeat Steps 1 through 9 for the remaining devices. For devices not included in this manual, refer to
the appropriate product datasheet.
240VAC POWER
POINT
24VAC
TRANSFORMER
EARTH
OMNI DEVICE
NEUTRAL
LIVE
VAC
VDC
<=3
DIGITAL
VOLT-OHM
METER
Ω
Terminals 1 & 2 in the image below are not polarity conscious, meaning EITHER terminal can be 24V or 0V. For the
purposes of clarity in this document, terminal 1 will be used for 24V and terminal 2 for 0V.
Figure 5-2: Checking Resistance
Figure 5-1: Omni Power Terminals
1 3 2