WIRING INSTRUCTIONS (Continued)
1) Supply Voltage - The input voltage to the I-PS24 should come from an isolated 24 VAC transformer or a 30 to 36 VDC
power supply. Connect this to the + 24 VAC – Terminal blocks.
Note: A grounded DC (-) terminal and a grounded 24 VAC Input transformer will blow the unit’s fuse in the
Full-Wave mode. Also, in half-wave mode, the 24 VAC connections are POLARITY SENSITIVE. Be sure to insure
that all 24 VAC minus (-) terminals are connected to the the same lead on the 24 VAC transformer.
Without any load attached, the I-PS24 uses 1.5 VA when
powered. Be sure to size the 120 VAC to 24 VAC transformer
to handle the power (VA) required by both the I-PS24 and the
load connected to the I-PS24. The I-PS24 is 65% ecient with
a24 VDC output voltage setting.
Derate the transformer VA to x%. Determine output power
required from the equation (voltage output x current draw
from load) = VA load. Example: (24 VDC * 0.2A) = 4.8 VA load.
Determine transformer power from the equation (output VA /
eciency) = VA transformer (or similar). Example: (4.8 VA /
0.65) = 7.4 VA transformer.
2) Output Connections – Connect your load to – VDC +
Terminal Blocks. Be mindful of polarity.
OUTPUT SELECTION JUMPERS
HALF WAVE - FULL WAVE RECTIFICATION
•The I-PS24 comes with the option of selecting either a
Full-Wave or Half-Wave output depending on your application
needs. All power supplies are shipped from the factory in
Half-Wave mode.
• Make sure there is no power applied to the unit when
changing jumpers. Failure to do so may harm the unit or cause
damage to any other device connected to the power supply.
HALF-WAVE VERSUS FULL-WAVE INDENTIFICATION
• If a device is half-wave, the signal common will typically be connected to the AC minus (-) terminal on the device.
Therefore, with no power applied, take an ohmic measure between signal common and AC (-) using a DMM; the reading
should measure less than two (2) ohms.
• If a device is full-wave, the signal common and the AC (-) will read overload or open when measured with a DMM.
HALF-WAVE JUMPER SETTING
FULL-WAVE JUMPER SETTING
FULL
FULL
HALF
HALF
J1
J1
INTEC Controls | 12700 Stowe Drive, Suite 100, Poway, CA 92064 | Ph: (858) 578.7887 & (888) GO.INTEC | inteccontrols.com
Specifications subject to change without notice. | I0000824, Version 3 | USA 200211 | Page 2of 3
I-PS24 Installation
