Installation Instructions · Publication 1734-IN017 · Rockwell Automation

1734-EPAC POINT I/O 120/240V AC Expansion Power Supply Install

This document is installation instructions for the Allen-Bradley POINT I/O 1734-EPAC and 1734-EPACK 120/240V AC Expansion Power Supply. It covers component identification, DIN rail installation and removal, terminal block wiring, and electrical and environmental specifications. The supply extends backplane bus power for up to 17 I/O modules and creates a field-voltage partition segment. It is compatible with POINT I/O adapters such as the 1734-ADN, 1734-ADNX, 1734-APB, 1734-ACNR, and 1734-AENT.

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4…17 modules I/O Module Capacity
85…264V AC, 50…60 Hz Input Voltage Range
1.3 A @ 5.2V DC POINTBus Output (Horizontal)
-20…+55 Operating Temperature

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Specifications

General Specifications

Input voltage, nominal 120/240V AC, 50…60 Hz
Input voltage range 85…264V AC
Field-side power, max 120V AC @ 200 mA; 240V AC @ 100 mA
Inrush current, max 2 A for 6 ms
Power consumption, max 15.1 W @ 264V AC
Power dissipation, max 8.4 W @ 264V AC
Thermal dissipation, max 28.7 BTU/hr @ 264V AC
POINTBus output current (horizontal) 1.3 A @ 5.2V DC
POINTBus output current (vertical) 1.0 A @ 5.2V DC
Isolation voltage 264V continuous; tested to withstand 3250V DC for 60 s
Input overvoltage protection MOV and fuse protected
Field power bus supply current, max 10 A
Interruption Output stays within specifications when input drops out for 10 ms @ 85V AC with max load
Enclosure type rating None (open-style)
Terminal base screw torque 0.8 N•m (7 lb•in)
Wire size 14…22 AWG (2.5…0.34 mm2), solid or stranded copper, rated 75 °C or greater
Dimensions (H x W x D), approx. 79.8 x 25.3 x 133.1 mm (3.14 x 1 x 5.24 in.)
Weight, approx. 182 g (6.40 oz)

Environmental Specifications

Temperature, operating -20…+55 °C (-4…+131 °F)
Temperature, nonoperating -40…+85 °C (-40…+185 °F)
Relative humidity 5…95% noncondensing
Vibration 2 g @ 10…500 Hz (IEC 60068-2-6)
Shock, operating 30 g (IEC 60068-2-27)
Shock, nonoperating 50 g (IEC 60068-2-27)
Emissions CISPR 11, Group 1, Class A
ESD immunity 6 kV contact discharges; 8 kV air discharges (IEC 61000-4-2)
Radiated RF immunity 10 V/m with 1 kHz sine wave 80% AM from 30…2000 MHz (IEC 61000-4-3)
EFT/B immunity ±4 kV at 5 kHz on power ports (IEC 61000-4-4)
Surge transient immunity ±1 kV line-line (DM) and ±2 kV line-earth (CM) on power ports (IEC 61000-4-5)
Conducted RF immunity 10 V rms with 1 kHz sine wave 80% AM from 150 kHz…80 MHz (IEC 61000-4-6)

Catalog Number Format

How to read an Allen-Bradley 1734 catalog number. Each position encodes a specific configuration attribute.

Position
Meaning
Example
Base catalog
1734-EPAC: POINT I/O 120/240V AC Expansion Power Supply
1734-EPAC
Suffix K
Conformal coated variant; specifications identical to non-conformal coated version
1734-EPACK

Certifications & Compliance

c-UL-us: UL Listed for Class I Division 2 Group A, B, C, D Hazardous Locations, certified for U.S. and Canada. See UL File E194810. CE and UKCA: UK SI 2016 No. 1091 and EU 2014/30/EU EMC Directive; EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2. UK SI 2016 No. 1101 and EU 2014/35/EU LVD; EN 61131-2. UK SI 2012 No. 3032 and EU 2011/65/EU RoHS; EN 63000. RCM: Australian Radiocommunications Act, compliant with EN 61000-6-4 Industrial Emissions. KC: Korean Registration of Broadcasting and Communications Equipment, Article 58-2 of Radio Waves Act, Clause 3. Morocco: Arrêté ministériel n° 6404-15 du 1er muharram 1437 and Arrêté ministériel n° 6404-15 du 29 ramadan 1436.

Document Contents

Full PDF covers the following topics in detail:

  • Summary of Changes
  • Before You Begin
  • About the AC Expansion Power Supply
  • Install the AC Expansion Power Supply
  • Wire the AC Expansion Power Supply
  • Specifications
  • Additional Resources

Frequently Asked Questions

How many I/O modules can the 1734-EPAC or 1734-EPACK support?
The AC expansion power supply supports 4 to 17 I/O modules to its right, depending on the current required by each module and the DIN rail mounting orientation. The total POINTBus current must not exceed 1.3 A for horizontal mounting or 1.0 A for vertical mounting. Twelve modules is typical depending on current draw.
Which POINT I/O adapters are compatible with the 1734-EPAC?
The 1734-EPAC and 1734-EPACK may only be used with POINT I/O adapters, including the 1734-ADN, 1734-ADNX, 1734-APB, 1734-ACNR, and 1734-AENT. They must not be used with the 1734-PDN module or with POINTBlock modules.
What is the input voltage range of the 1734-EPAC?
The nominal input voltage is 120/240V AC at 50 to 60 Hz. The operating input voltage range is 85 to 264V AC.
What is the difference between 1734-EPAC and 1734-EPACK?
The 1734-EPACK is the conformal coated version of the 1734-EPAC. Catalog numbers with the suffix K are conformal coated, and their specifications are the same as the non-conformal coated catalogs.
What does the AC expansion power supply do for field power partitioning?
The unit creates a field-voltage partition segment that separates field power from I/O modules to the left of it. This allows functional partitioning to separate field power between input and output modules, and logical partitioning to group modules that perform a specific task or function.
What wire sizes are accepted at the terminal block?
The terminal block accepts 14 to 22 AWG (2.5 to 0.34 mm2) solid or stranded copper wire rated at 75 °C or greater, with a maximum insulation diameter of 1.2 mm (3/64 in.). Terminal base screw torque is 0.8 N•m (7 lb•in).
What DIN rail material should be used with POINT I/O?
POINT I/O is grounded through the DIN rail to chassis ground. The installation instructions specify the use of zinc-plated chromate-passivated steel DIN rail to ensure proper grounding. Other materials such as aluminum or plastic can corrode, oxidize, or conduct poorly, resulting in improper or intermittent platform grounding.

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