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Installation Instructions
Original Instructions
Compact I/O Expansion Power Supplies
Catalog Numbers 1769-PA2, 1769-PA2K, 1769-PB2, 1769-PB2K, 1769-PA4, 1769-PA4K,
1769-PB4, 1769-PB4K
Compact I/O™ power supplies provide 120/240V AC and 24V DC power to modules, which
you can place to the left or the right side of the 1769 power supply. As many as eight I/O
modules can be placed on each side of the power supply.
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Table of Contents
Related Manuals for Allen-Bradley 1769-PA2K
Summary of Contents for Allen-Bradley 1769-PA2K
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Page 1: Table Of Contents
Installation Instructions Original Instructions Compact I/O Expansion Power Supplies Catalog Numbers 1769-PA2, 1769-PA2K, 1769-PB2, 1769-PB2K, 1769-PA4, 1769-PA4K, 1769-PB4, 1769-PB4K Topic Page Summary of Changes Before You Begin Assemble the System Mount an I/O Expansion Power Supply Verify Your System Power Power Considerations Use a Master Control Relay... -
Page 2: Topic
This publication contains new and updated information as indicated in this table. Topic Page Updated document with current specifications and certifications Throughout Updated document with new catalog numbers: 1769-PA2K, 1769-PB2K, 1769-PA4K, 1769-PB4K Throughout North American Hazardous Location Approval The following information applies when operating Informations sur l’utilisation de cet équipement en this equipment in hazardous locations. - Page 3 Compact I/O Expansion Power Supplies Environment and Enclosure ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in EN/IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating. This equipment is not intended for use in residential environments and may not provide adequate protection to radio communication services in such environments.
- Page 4 Compact I/O Expansion Power Supplies Always hard-wire circuits that are installed on the machine for safety reasons directly to the master control relay. Examples include overtravel limit switches, stop push buttons, and interlocks. These devices must be wired in series so that when any one device opens, the master control relay is de-energized, which removes power from the machine.
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Page 5: Before You Begin
Compact I/O Expansion Power Supplies WARNING: Special Conditions for Safe Use: • This equipment is not resistant to sunlight or other sources of UV radiation. • This equipment shall be mounted in an ATEX/IECEx Zone 2 certified enclosure with a minimum ingress protection rating of at least IP54 (as defined in EN/IEC 60529) and used in an environment of not more than Pollution Degree 2 (as defined in EN/IEC 60664-1) when applied in Zone 2 environments. - Page 6 Compact I/O Expansion Power Supplies Parts Illustration of a Power Supply The sample illustrations of a 1769-PA4 power supply let you review the various components that comprise a power supply, which is attached to a DIN rail. 1769-PA4 Power Supply Components Item Description Bus lever (with locking function)
- Page 7 Compact I/O Expansion Power Supplies Power Supply Components (Continued) Item Description Nameplate label Upper tongue-and-groove slots Lower tongue-and-groove slots Upper DIN rail latches Lower DIN rail latches Terminal block with fingersafe cover Fuse housing cover for replaceable fuse Install an I/O Expansion Power Supply Compact I/O Expansion Power Supplies are suitable for use in an industrial environment when installed in accordance with these instructions.
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Page 8: Assemble The System
The maximum amount of current the system supports in both directions is: • 1769-PA2, 1769-PA2K, 1769-PB2, 1769-PB2K: 2 amps at 5V DC; 1 amp at 24V DC • 1769-PA4, 1769-PA4K, 1769-PB4, 1769-PB4K: 4 amps at 5V DC; 2 amps at 24V DC... - Page 9 Compact I/O Expansion Power Supplies Follow these steps to assemble the Compact I/O system. 1. Disconnect your line power. The power supply does not support removal or insertion of modules under power. WARNING: If you connect or disconnect wiring while the field-side power is on, an electrical arc can occur.
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Page 10: Mount An I/O Expansion Power Supply
Compact I/O Expansion Power Supplies Mount an I/O Expansion Power Supply ATTENTION: During panel or DIN rail mounting of all devices, be sure that all debris (for example, metal chips, wire strands) is kept from falling into the module. Debris that falls into the module could cause damage on power up. - Page 11 Additional grounding connections from the power supply's mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded. Refer to Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1, for additional information.
- Page 12 Compact I/O Expansion Power Supplies Mount a Power Supply on a DIN Rail The power supply can be mounted using the following DIN rails: • 35 x 7.5 mm (EN 50 022 - 35 x 7.5) • 35 x 15 mm (EN 50 022 - 35 x 15) 1.
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Page 13: Verify Your System Power
• Total 5V DC • Total 24V DC • Total 24V DC sensor power (1769-PA2, 1769-PA2K only) 3. If your power supply load is at or above the limits of the allowable ranges that are shown in the graphs, you must add an additional I/O bank. -
Page 14: Power Considerations
Compact I/O Expansion Power Supplies Power Considerations The following sections explain power considerations for the Compact I/O system. Disconnect the Main Power WARNING: EXPLOSION HAZARD Do not replace components or disconnect equipment unless power has been switched off. If you connect or disconnect wiring while the field-side power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. - Page 15 Reload the user program following a power supply shutdown. ATTENTION: To avoid unexpected operation due to 24V DC user power shutdown (1769-PA2 and 1769-PA2K only), monitor the 24V DC user output with a 24V DC input channel. Rockwell Automation Publication 1769-IN028I-EN-P - July 2020...
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Page 16: Use A Master Control Relay
Compact I/O Expansion Power Supplies Use a Master Control Relay A hard-wired master control relay (MCR) provides a reliable means for emergency machine shutdown. Since the master control relay allows the placement of several emergency stop switches in different locations, its installation is important from a safety standpoint. Overtravel limit switches or mushroom-head push buttons are wired in series so that when any of them opens, the master control relay is de-energized. -
Page 17: Schematic (Using Iec Symbols)
Compact I/O Expansion Power Supplies Schematic (Using IEC Symbols) 230V AC Operation of either of these contacts removes power from the external Disconnect I/O circuits, which stops machine motion. Fuse 230V AC Circuits Isolation Master Control Relay (MCR) Transformer Cat. No. 700-PK400A1 115V AC Suppressor Start... -
Page 18: Schematic (Using Ansi/Csa Symbols)
Compact I/O Expansion Power Supplies Schematic (Using ANSI/CSA Symbols) Operation of either of these contacts 230V AC removes power from the external I/O circuits, which stops machine motion. Disconnect Fuse 230V AC Circuits Isolation Transformer Master Control Relay (MCR) Cat. No. 700-PK400A1 Emergency-Stop Push 115V AC Suppressor... - Page 19 Compact I/O Expansion Power Supplies Power Supply Connection Bank 1 Bank 2 Item Description The maximum amount of bus current that can be distributed on the 1769 bus (on either side of the power supply, A or B) is: 1, 2 •...
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Page 20: Connect Field Wires
Additional grounding connections from the power supply's mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded. Refer to Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1, for additional information. - Page 21 NOT USED NOT USED +24V DC +24V DC DC NEUTRAL DC NEUTRAL CHASSIS GROUND CHASSIS GROUND Catalog Number 1769-PA2, 1769-PA2K Catalog Number 1769-PA4, 1769-PA4K *PWR OUT +24V DC NOT USED *PWR OUT COM NOT USED 120/240V AC (L1) 120/240V AC (L1)
- Page 22 Compact I/O Expansion Power Supplies Wire the Fingersafe Terminal Block When wiring the terminal block, keep the fingersafe cover in place. 1. Loosen the terminal screws to be wired. Wiring the Fingersafe Terminal Block 2. Route the wire under the terminal pressure plate. You can use the bare wire or a spade lug.
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Page 23: Replace The Fuse
Compact I/O Expansion Power Supplies Replace the Fuse ATTENTION: Never install, remove, or wire power supplies unless power has been switched off. Follow these steps to replace a blown fuse. 1. Remove Compact I/O system power to correct conditions that are causing the short circuit. -
Page 24: Temperature Derating
Compact I/O Expansion Power Supplies Temperature Derating The following graphs indicate how much current can be drawn from the power supply at the indicated case temperature without damaging it. 1769-PA2, 1769-PA2K Output Derating With User +24V Current Draw at 0 Amps 0.875 55 °C 60 °C... - Page 25 Compact I/O Expansion Power Supplies With User +24V Current Draw at 0.25 Amps 55 °C +24V Bus Load (Amps) 1769-PB2, 1769-PB2K Output Derating Total Output: 29 W at 60 °C (140 °F) or below 60 °C +24V Bus Load (Amps) Rockwell Automation Publication 1769-IN028I-EN-P - July 2020...
- Page 26 Compact I/O Expansion Power Supplies 1769-PA4, 1769-PA4K Output Derating Total Output: 68 W at 55 °C (131 °F) or below 61 W at 60 °C (140 °F) or below 55 °C 60 °C +24V Bus Load (Amps) 1769-PB4, 1769-PB4K Output Derating Total Output: 68 W at 55 °C (131 °F) or below 61 W at 60 °C (140 °F) or below 55 °C...
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Page 27: Power Dissipation
Compact I/O Expansion Power Supplies Power Dissipation The following graphs indicate the real electrical power dissipation of the power supply in function of the electrical load. 1769-PA2, 1769-PA2K Real Power Dissipation 55 °C 60 °C Bus +5V, +24V, and User +24V Load... - Page 28 Compact I/O Expansion Power Supplies 1769-PA4, 1769-PA4K Real Power Dissipation 60 °C 55 °C Bus +5V, +24V (Watts) 1769-PB4, 1769-PB4K Real Power Dissipation 55 °C 60 °C Bus +5V, +24V (Watts) Rockwell Automation Publication 1769-IN028I-EN-P - July 2020...
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Page 29: Specifications
Compact I/O Expansion Power Supplies Specifications Technical Specifications Attribute 1769-PA2, 1769-PA2K 1769-PB2, 1769-PB2K 1769-PA4, 1769-PA4K 1769-PB4, 1769-PB4K Input voltage range 85…265V AC 19.2…31.2V DC 85…265V AC 19.2…32V DC Input frequency range 47…63 Hz 47…63 Hz Power supply distance rating 8 I/O modules can be connected on either side of the power supply for a maximum of 16 modules... - Page 30 Compact I/O Expansion Power Supplies Environmental Specifications 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4, Attribute 1769-PA2K 1769-PB2K 1769-PA4K 1769-PB4K Temperature, operating IEC 60068-2-1 (Test Ad, Operating Cold IEC 60068-2-2 (Test Bd, Operating Dry 0 °C < Ta < 60 °C (32 °F < Ta < 140 °F)
- Page 31 Compact I/O Expansion Power Supplies Environmental Specifications (Continued) 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4, Attribute 1769-PA2K 1769-PB2K 1769-PA4K 1769-PB4K ±2 kV line-line (DM) and ±4 kV line-earth (CM) on AC power ±500 V line-line ±2 kV line-line (DM) ports ±500 V line-line (DM) and (DM) and ±1 kV line-...
- Page 32 Compact I/O Expansion Power Supplies Certifications Certifications 1769-PA2, 1769-PA2K, 1769-PA4, 1769-PA4K 1769-PB2, 1769-PB2K, 1769-PB4, 1769-PB4K c-UL-us UL Listed for Class 1, Division 2 Group A,B,C,D Hazardous Locations, certified for U.S. and Canada. See UL File E334470. European Union 2014/30/EU EMC Directive, compliant with: •...
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Page 33: Additional Resources
Compact I/O Expansion Power Supplies Additional Resources Resource Description CompactLogix Power Supplies Specifications Provides a detailed description of the 1769 CompactLogix power supplies. Technical Data, publication 1769-TD008 Compact I/O 1769-ADN DeviceNet Adapter User Provides information on how to install and use a 1769-ADN DeviceNet Manual, publication 1769-UM001 adapter. - Page 34 Compact I/O Expansion Power Supplies Notes: Rockwell Automation Publication 1769-IN028I-EN-P - July 2020...
- Page 35 Compact I/O Expansion Power Supplies Notes: Rockwell Automation Publication 1769-IN028I-EN-P - July 2020...
- Page 36 Rockwell Automation maintains current product environmental information on its website at http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page. Allen-Bradley, Compact I/O, CompactLogix, MicroLogix, Rockwell Automation, and Rockwell Software are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies.