Intec Controls I-PS24 Installation instructions
I-PS24 (POWER SUPPLY)
Installation & Operation Instructions
GENERAL INFORMATION
The I-PS24 adjustable power supply is a low cost,
dependable external power supply. This unit will
accept an input of up to 26 VAC or 36 VDC, and provides
an adjustable 1.5 to 26 VDC output. Field voltage
adjustment is done by adjusting a potentiometer
using a at-head screwdriver. The I-PS24 is setup for
Half-wave rectication from factory, but can be set to
Full-wave rectication via jumpers.
MOUNTING
I-PS24 is supplied with a snap track for mounting.
The circuit board may be mounted in any
position. In equipment / electrical compartments,
mounting upside down at top of the enclosure is not
recommended as heat build-up could be a problem
when running higher current loads.
Use only ngers to remove board from snap track.
Slide out of snap track or push against side of snap
track and lift that side of the circuit board to remove.
Do not ex board or use tools.
WIRING INSTRUCTIONS
PRECAUTIONS
• Remove power before wiring. Never connect or
disconnect wiring with power applied.
• All wiring must comply with local and National
Electric Codes.
• It is recommended you use an isolated UL-listed class 2 transformer when powering the unit with 24 VAC.
Failure to wire the devices with the correct polarity when sharing transformers may result in damage to any
device powered by the shared transformer.
•In applications where a Pilot Duty or remote relay is required, the I-DO008 transorb can be placed across the
coil of the relay to snub electrical spikes when the relays are de-energized. An external transorb may not
be required if the relay and I-PS24 power supply is mounted within the same control panel.
FIGURE 1: DIMENSIONS
PCB Board
Snap
Track
2.88”(73.2mm)
0.70”
(17.78mm)
2.05”
(52.07mm)
3.10”(78.74mm)
Fuse
24 VAC
VDC
Output Selection Jumpers
V-OUT
Adjustment
Power
Indicator
(LED)
+
-
+
-
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 1of 3
I-PS24 Installation
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
VOLTAGE OUTPUT ADJUSTMENT
The output is factory set to 24 VDC, but can be adjusted from 1.5 to 26 VDC. The voltage output can be changed by
adjusting the P1 turn pot with a at-head screwdriver. Rotate the turn pot screw clockwise to increase the voltage output,
or rotate the turn pot screw counter-clockwise to decrease the voltage output.
OUTPUT CURRENT
The maximum output current (mA) will be dependent on multiple factors, including ambient room temperature, voltage,
etc. The graph below shows the minimum (bottom line) and maximum (top line) current output.
PRODUCT SPECIFICATIONS
W.E.E.E. DIRECTIVE
At the end of their useful life the packaging and product should be disposed of via a suitable recycling centre. Do not
dispose of with household waste. Do not burn.
22 VAC to 26 VAC, 50/60Hz; or 30 VDC to 36 VDC
24 VDC
1.5 VDC to 26 VDC
Jumper Selectable
Built-in current limiting thermal protection
Fuse, 3.15A/250 VAC, 5x20 mm, fast acting (Littelfuse 02173.15MXP or equivalent)
32ºF to 158ºF (0ºC to 70ºC)
5% to 95% RH non-condensing
Screw Terminal Blocks | 14 AWG (2.1 mm
2
) to 22 AWG (0.33 mm
2
)
4 lb-in (0.5 Nm) maximum
Supply Power
Output Voltage – Factory Set
Output Adjustment Range
Half-Wave/Full-Wave Selection
Overload Protection
Ground-Loop Protection
Operating Temperature Range:
Operating Humidity Range:
Connections | Wire Size:
Terminal Block Torque Rating:
AMBIENT AIR TEMPERATURE | 77ºF (25ºC)
Volts (DC)
5
0.0
0.2
0.4
0.6
0.8
1.0
10 12 15 18 20 24 27
MAX
0.605
MIN
0.325
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 3of 3
I-PS24 Installation
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