Opto 22 SNAP-PS5, SNAP-PS5-24DC, SNAP-PS5U, SNAP-PS24, SNAP-PS24U Data Sheet

SNAP POWER SUPPLIES

Features

Built-in fuse, ON/OFF power switch, and LED indicator

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Convenient panel mounting; optional DIN-rail mounting

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Easy connections

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Wide input voltage range

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UL approved

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Factory Mutual approved (except SNAP-PS5U and

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SNAP-PS24U)

DESCRIPTION

SNAP power supplies provide the best source of AC or DC power for
your Opto 22 SNAP PAC hardware. Packaged in a compact and sturdy
housing, SNAP power supplies include a built-in fuse, an LED status
indicator, and an ON/OFF power switch for ease of use.

DATA SHEET

Form 1120-200129

PAGE 1

SNAP-PS5 power supply

The SNAP-PS24 and SNAP-PS24U power supplies are designed for
either of two purposes:

To provide primary power for a SNAP PAC S-series controller
To provide 24 volts of DC loop power for SNAP analog modules

mounted on a SNAP PAC rack

The SNAP-PS5, SNAP-PS5-24DC, and SNAP-PS5U power supplies
are designed to provide 5 VDC power for a SNAP PAC rack with an I/O
processor (SNAP PAC brain or R-series controller) and I/O modules
mounted on the rack. The combination of a rack, processor, and
modules is called an I/O unit.

Opto 22 recommends using one SNAP power supply for each I/O unit
and for each controller. Choose the power supply based on the load
required for the I/O unit. See the power requirements tables starting
on page 12 for help in determining the power supplies you need.
Additional information on using power supplies can be found in the
Opto 22 technical note Using Power Supplies with Opto 22 Systems
(form #1271, available on our website,

All SNAP power supplies except the SNAP-PS5-24DC require AC input
power. The SNAP-PS5U and SNAP-PS24U accommodate a wide range
of AC input voltages, from 100 to 250 VAC.

The SNAP-PS5-24DC DC-to-DC power supply requires a 24 VDC input
and is ideal for systems using DC backup power.

Each SNAP power supply can be mounted in one of two ways: next to
the controller or SNAP I/O unit it powers, using the standard
panel-mounting base, or directly on a DIN rail using the optional
35mm DIN-rail adapter.

AC or DC input power connections, as required by the model, are
made to a removable terminal strip on top of the power supply. DC
output power is then ready to be hooked up to the controller or rack
using the attached wiring harness.

SNAP power supplies work with Wired+Wireless™ PACs and I/O units
as well as standard wired PACs and I/O.

Notes for legacy hardware: SNAP power supplies are also
compatible with Ethernet-based SNAP Ultimate, SNAP Ethernet, and
SNAP Simple I/O, and with serial-based SNAP I/O units such as those
with a B3000, SNAP-HA, or SNAP-B3000-MODBUS brain.

Part Numbers

Part Description

SNAP-PS5

SNAP-PS5-24DC

SNAP-PS5U

SNAP-PS24

SNAP-PS24U

SNAP-PSDIN

SNAP-PSUDIN

SNAP Power Supply
120 VAC input; 5 VDC, 4 A output

SNAP Power Supply
24 VDC input; 5 VDC, 4 A output

SNAP Power Supply
100–250 VAC input; 5 VDC, 5 A output

SNAP Power Supply
120 VAC input; 24 VDC, 3/4 A output

SNAP Power Supply
100–250 VAC input; 24 VDC, 1-1/4 A output

35mm DIN-Rail Adapter for SNAP-PS5,
SNAP-PS24, or SNAP-PS5-24DC

35mm DIN-Rail Adapter for SNAP-PS5U or
SNAP-PS24U

© 2001–2020 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

Form 1120-200129

SPECIFICATIONS

SNAP-PS5 SNAP-PS5-24DC SNAP-PS5U

Input Voltage 95–130 VAC, 47–63 Hz 18–32 VDC 100–250 VAC, 47–63 Hz

Output Voltage 5.1 ±0.1 VDC 5.1 ±0.1 VDC 5.1 ±0.1 VDC

Output Current 4.0 A 4.0 A 5.0 A

Maximum Input Current Draw 0.4 Amps at 120 VAC 1.3 Amps at 24 VDC 0.5 Amps at 120 VAC

Dimensions

Weight 15 oz. (425.25 g) 15 oz. (425.25 g) 1.9 lbs (863.63 g)

Operating Temperature -20 to 70 °C -20 to 70 °C -20 to 70 °C

Storage Temperature -30 to 85 °C -30 to 85 °C -30 to 85 °C

Torque, connector screws 4.5 in-lb (0.51 N-m) 4.5 in-lb (0.51 N-m) 4.5 in-lb (0.51 N-m)

Fuse

Agency Approvals FM, UL, ATEX, DFARS

Warranty 30 months 30 months 30 months

See the drawings starting on

page 8.

Opto 22 PN: SNAP-FUSE1AB
Vendor PN: GDC-1A (Bussman)

See the drawings starting on

page 8.

Opto 22 PN: SNAP-FUSE2AB
Vendor PN: GDB-2A (Bussman)

FM, UL, CE, ATEX, RoHS,
DFARS

See the drawings on

page 10.

Internal fuse

UL, CE, RoHS, DFARS

DATA SHEET

PAGE 2

SNAP-PS24 SNAP-PS24U

Input Voltage 95–130 VAC, 47–63 Hz 100–250 VAC, 47–63 Hz

Output Voltage 24 ± 0.6 VDC 24 ± 0.1 VDC

Output Current 0.75 A 1.25 A

Maximum Input Current Draw 0.4 Amps @ 120 VAC 0.5 Amps @ 120 VAC

Dimensions

Weight 2.1 lbs (952.54 g) 1.9 lbs (863.63 g)

Operating Temperature -20 to 70 °C -20 to 70 °C

Storage Temperature -30 to 85 °C -30 to 85 °C

Torque, connector screws 4.5 in-lb (0.51 N-m) 4.5 in-lb (0.51 N-m)

Fuse

Agency Approvals FM, UL, CE, RoHS, DFARS UL, CE, RoHS, DFARS

Warranty 30 months 30 months

See drawings starting on

Opto 22 PN: SNAP-FUSE1AB Vendor
PN: GDC-1A (Bussman)

page 8. See drawings on page 10.

Internal fuse

© 2001–2020 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

I/O UNIT POWER REQUIREMENTS

The tables starting on page 12 will help you determine the power
supply needs for your system. Copy the power requirements
worksheet and complete one for each distributed I/O unit.

In addition, keep the following power recommendations in mind. For
more help with power supplies, see Opto 22 form #1271, Using Power
Supplies with Opto 22 Systems.

Use a single power supply per rack

In general, we recommend you use an independent, isolated,
regulated power supply locally with each rack. Local isolated supplies
offer these advantages:

Short supply conductors, which minimize losses
Power redundancy, so the failure of a single supply causes only a

single rack failure, not a total system failure
Fewer voltage drops and ground loops (Voltage drops and

subsequent ground loops may occur when power is distributed
over a large system.)

DATA SHEET

Form 1120-200129

PAGE 3

Always use a separate field supply

Use a separate power supply for the field side of the I/O. Using the
rack supply for field actuation and monitoring defeats the isolation
the I/O module offers and therefore increases the chance of a ground
loop within the control system. Additionally, a sudden change of
current on the field side can cause undesirable voltage fluctuations
that may interfere with the controller or I/O unit’s operation.

Power wiring guidelines

Use one power supply per I/O unit.
Use one power supply per controller.
Use 14 AWG wire.
SNAP power supplies have short wires to minimize voltage drop.

Do not extend the length of the wires.
If you power multiple I/O units or controllers from one power

supply, use a star wiring topology. Do not daisy-chain power
wiring from one device to the next.

© 2001–2020 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

INSTALLATION

Panel Mounting (standard)

Mount the SNAP power supply in a location where the attached red and black power
wires will reach the “+” and “-” power terminals on the SNAP mounting rack or controller.
Do not extend the wires.

DIN-Rail Mounting (optional)

1. For 35mm DIN-rail mounting, remove the four screws that fasten the panel mounting
base plate to the power supply. Keep screws in a safe place.

2. Remove panel mounting base plate.

3. In place of the panel mounting base plate, use the four screws removed in step 1 to

fasten the DIN-rail adapter (purchased separately) to the power supply.

4. Mount the SNAP power supply on the DIN rail (next to the power connector on the
I/O unit).

DATA SHEET

Form 1120-200129

PAGE 4

© 2001–2020 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

WIRING—PRIMARY POWER SUPPLY

DATA SHEET

Form 1120-200129

PAGE 5

Wiring to a Standalone Controller

1. For a controller, check the controller’s specifications in its data
sheet or user’s guide to make sure you have the correct power
supply for the controller’s requirements.

2. Follow directions in the controller’s user’s guide to wire the power
supply to the controller. The power supply’s red (or
white-and-red) wire is the positive wire; the black (or
white-and-black) wire is the negative wire.

Wiring to a SNAP I/O Unit

1. Using the power terminals on the SNAP mounting rack, attach the
red wire to the “+” terminal and the black wire to the “-” terminal.

2. For the SNAP-PS5 (not illustrated): Using the removable input
power connector on top of the power supply, apply 120 volts AC
power between the two terminals marked “AC.” The ground
terminal should be connected to ground.

3. For the SNAP-PS5-24DC (not illustrated): Using the removable
input power connector on top of the power supply, apply 24 volts
DC power between the two terminals marked “±DC.” The ground
terminal should be connected to ground.

4. For the SNAP-PS5U (illustrated below): Using the removable
input power connector on top of the power supply, apply 100–
250 volts AC power between the two terminals marked “AC.” The
ground terminal should be connected to ground.

© 2001–2020 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.