Installation Instructions Compact I/O Expansion Power Supplies Catalog Numbers 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4 Topic Page Important User Information 2 Environment and Enclosure 3 North American Hazardous Location Approval 4 Install Safety Circuits 4 European Hazardous Location Approval 5 Before You Begin 6 Assemble the System 9 Mount an I/O Expansion Power Supply 11 Verify Your System Power 14 Power Considerations 15 Use a Master Control Relay 17 Schematic (Using IEC Symbols)
Compact I/O Expansion Power Supplies Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.com) describes some important differences between solid state equipment and hard-wired electromechanical devices.
Compact I/O Expansion Power Supplies 3 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 IEC publication 60664-1), at altitudes up to 2000 meters (6562 ft) without derating. This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11.
Compact I/O Expansion Power Supplies North American Hazardous Location Approval The following information applies when operating this equipment in hazardous locations: Informations sur l’utilisation de cet équipement en environnements dangereux: Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations only.
Compact I/O Expansion Power Supplies 5 European Hazardous Location Approval 1769-PB2, 1769-PB4 Only European Zone 2 Certification (The following applies when the product bears the Ex or EEx Marking) This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC and has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in potentially explosive atmosph
Compact I/O Expansion Power Supplies Before You Begin There are some points about power distribution that you should know. • The master control relay must be able to inhibit all machine motion by removing power to the machine I/O devices when the relay is de-energized. We recommend that the controller remains powered even when the master control relay is de-energized. • If you are using a DC power supply, interrupt the load side rather than the AC line power.
Compact I/O Expansion Power Supplies 7 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.
Compact I/O Expansion Power Supplies Item Description 7a Upper tongue-and-groove slots 7b Lower tongue-and-groove slots 8a Upper DIN rail latches 8b Lower DIN rail latches 9 Terminal block with finger-safe cover 10 Fuse housing cover for replaceable fuse 11 120V AC or 240V AC line input power selector switch (PA4 only) 12 Removable selector switch label (PA4 only) Install an I/O Expansion Power Supply Compact I/O Expansion Power Supplies are suitable for use in an industrial environmen
Compact I/O Expansion Power Supplies 9 Assemble the System 1769 Compact I/O power supplies distribute power from either side of the power supply. EXAMPLE A 2 amp at 5V DC power supply (1769-PA2, 1769-PB2) can provide 1 amp to the right side of the power supply and 1 amp to the left. A 4 amp at 5V DC power supply (1769-PA4, 1769-PB4) can provide 2 amps to the right side of the power supply and 2 amps to the left.
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. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding. 2.
Compact I/O Expansion Power Supplies 11 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. Minimum Spacing Maintain spacing from enclosure walls, wireways, adjacent equipment, and so forth. Allow 50 mm (2 in.) of space on all sides for adequate ventilation.
Compact I/O Expansion Power Supplies Additional cooling provisions might be necessary when high ambient temperatures are encountered. TIP Do not bring in unfiltered outside air. Place the Compact I/O system in an enclosure to protect it from a corrosive atmosphere. Harmful contaminants or dirt could cause improper operation or damage to components. In extreme cases, you may need to use air conditioning to protect against heat build-up within the enclosure.
Compact I/O Expansion Power Supplies 13 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. Before mounting a power supply or module on a DIN rail, close the DIN rail latches. 2. Press the DIN rail mounting area of the module against the DIN rail. The latches will momentarily open and lock into place.
Compact I/O Expansion Power Supplies Verify Your System Power Your system power budget is a consideration when using 1769 power supplies. This determines the power that is being provided to the I/O modules. Refer to Calculate System Power Requirements in the Compact I/O Selection Guide, publication 1769-SG002-EN-P, for the power budget calculation worksheet. TIP The total number of I/O modules cannot exceed 16 on a single bank with a maximum of 8 I/O modules on either side of the power supply.
Compact I/O Expansion Power Supplies 15 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.
Compact I/O Expansion Power Supplies Loss of Power Source The power supply is designed to withstand brief power losses without affecting the operation of the system. The time the system is operational during power loss is called “program scan hold-up time after loss of power.” The duration of the power supply hold-up time depends on the type and state of the I/O, but is typically between 5 milliseconds…10 seconds.
Compact I/O Expansion Power Supplies 17 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.
Compact I/O Expansion Power Supplies Schematic (Using IEC Symbols) L1 L2 230V AC Operation of either of these contacts will remove power from the external I/O circuits, stopping machine motion. Disconnect Isolation Transformer X1 115V AC X2 or 230V AC Fuse Fuse MCR 230V AC I/O Circuits Master Control Relay (MCR) Cat. No. 700-PK400A1 Emergency-Stop Push Button Overtravel Limit Switch Stop Start Suppressor Cat. No.
Compact I/O Expansion Power Supplies 19 Schematic (Using ANSI/CSA Symbols) L1 L2 230V AC Disconnect Operation of either of these contacts will remove power from the external I/O circuits, stopping machine motion. MCR Fuse 230V AC I/O Circuits Isolation Transformer X1 115V AC X2 or 230V AC Emergency-Stop Push Button Overtravel Limit Switch Master Control Relay (MCR) Cat. No. 700-PK400A1 Stop Suppressor Cat. No. 700-N24 Start MCR Fuse Suppr MCR MCR 115V AC or 230V AC DC Power Supply.
Compact I/O Expansion Power Supplies Each 1769 I/O module has a power supply distance rating, with a maximum value of eight. Refer to the specific 1769 I/O module’s installation instructions for more information.
Compact I/O Expansion Power Supplies 21 Connect Field Wires The following instructions explain how to wire your power supply. Ground the Power Supply ATTENTION This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. 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.
Compact I/O Expansion Power Supplies 3. Connect incoming power to the power supply terminals as indicated below. Catalog Number 1769-PB2, 1769-PB4 NOT USED NOT USED +24V DC DC NEUTRAL CHASSIS GROUND Catalog Number 1769-PA2 PWR OUT +24V DC(1) PWR OUT COM (1) Catalog Number 1769-PA4 NOT USED NOT USED 120/240V AC (L1) 120/240V AC (L1) V AC COM (L2) V AC COM (L2) CHASSIS GROUND CHASSIS GROUND ATTENTION Turn off incoming power before connecting or disconnecting wires.
Compact I/O Expansion Power Supplies 23 Wire the Finger-safe Terminal Block When wiring the terminal block, keep the finger-safe cover in place. 1. Loosen the terminal screws to be wired. Wiring the Finger-safe Terminal Block 2. Route the wire under the terminal pressure plate. You can use the bare wire or a spade lug. The terminals will accept a 6.35 mm (0.25 in.) spade lug. TIP The terminal screws are non-captive. Therefore, it is possible to use a ring lug [maximum 1/4-inch o.d. with a 0.
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 causing the short circuit. 2. Place a slotted screwdriver under the tab to remove the fuse housing cover. 3. Use a fuse puller or similar device to remove the fuse. Use care so that the printed circuit board and surrounding electronics are not damaged.
Compact I/O Expansion Power Supplies 25 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 Output Derating With User +24V Current Draw at 0 Amps 0.875 2.0 55 °C +5V Bus Load (Amps) 1.5 1.4 1.0 60 °C 0.5 44726 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 +24V Bus Load (Amps) With User +24V Current Draw at 0.2 Amps 0.675 0.85 +5V Bus Load (Amps) 2.0 1.5 55 °C 1.
Compact I/O Expansion Power Supplies With User +24V Current Draw at 0.25 Amps 0.8 2.0 +5V Bus Load (Amps) 1.5 55 °C 1.0 1.0 0.5 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 +24V Bus Load (Amps) 44728 1769-PB2 Output Derating Total Output: 29 W at 60 °C (140 °F) or below 0.8 2.0 1.5 +5V Bus Load (Amps) 60 °C 1.0 1.0 0.5 0.2 0.0 0.0 0.1 0.2 0.3 0.4 0.5 +24V Bus Load (Amps) Publication 1769-IN028B-EN-P - October 2008 0.6 0.7 0.8 0.9 1.
Compact I/O Expansion Power Supplies 27 1769-PA4 Output Derating Total Output: 68 W at 55 °C (131 °F) or below 61 W at 60 °C (140 °F) or below 1.7 4.0 +5V Bus Load (Amps) 55 °C 3.0 2.6 2.0 60 °C 1.0 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 +24V Bus Load (Amps) 1769-PB4 Output Derating Total Output: 68 W at 55 °C (131 °F) or below 61 W at 60 °C (140 °F) or below 1.7 4.0 +5V Bus Load (Amps) 55 °C 3.0 2.6 2.0 60 °C 1.0 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.
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.
Compact I/O Expansion Power Supplies 29 1769-PA4 Real Power Dissipation 15 (Watts) Real Power Dissipated 20 10 55 °C 5 0 60 °C 0 20 40 60 Bus +5V, +24V, and User +24V Load (Watts) 1769-PB4 Real Power Dissipation 15 55 °C (Watts) Real Power Dissipated 20 10 5 60 °C 0 0 20 40 60 Bus +5V, +24V, and User +24V Load (Watts) Publication 1769-IN028B-EN-P - October 2008
Compact I/O Expansion Power Supplies Specifications 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4 - Technical Specifications Attribute Input voltage range Input frequency range Power supply distance rating(1) 1769-PA2 1769-PB2 1769-PB4 85…265V AC 19.2…31.2V DC 85…132V AC or 170…265V AC, switch selectable 19.2…32V DC 47…63 Hz N/A 47…63 Hz N/A 8 (8 I/O modules can be connected on either side of the power supply for a maximum of 16 modules.
Compact I/O Expansion Power Supplies 31 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4 - Technical Specifications Attribute Wire size 1769-PA2 1769-PB2 1769-PB4 2.5 mm2 (14 AWG) solid copper wire rated at 90 °C (194 °F), or greater, 1.2 mm (3/64 in.
Compact I/O Expansion Power Supplies 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4 - Environmental Specifications Attribute 1769-PA2 1769-PB2 Vibration 1769-PA4 1769-PB4 5 g @ 10…500 Hz IEC 60068-2-6 (Test Fc, Operating) Operating shock DIN rail mount: 20 g; Panel Mount 30 g IEC 60068-2-27 (Test Ea, Unpackaged Shock) DIN rail mount: 30 g; Panel Mount 40 g Nonoperating shock IEC 60068-2-27 (Test Ea, Unpackaged Shock) Emissions CISPR 11 Group 1, Class A ESD immunity IEC61000-4-2 Radiated RF immunity
Compact I/O Expansion Power Supplies 33 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4 - Environmental Specifications Attribute 1769-PA2 1769-PA4 1769-PB4 10V rms with 1kHz sine-wave 80% AM from 150 kHz...
Compact I/O Expansion Power Supplies 1769-PA2, 1769-PA4 - Certifications(1) Certifications(2) Value CE European Union 2004/108/EC EMC Directive, compliant with: • EN 61000-6-2; Industrial Immunity • EN 61000-6-4; Industrial Emissions C-Tick Australian Radio Communications Act, compliant with: • AS/NZS CISPR 11; Industrial Emissions (1) When product is marked. (2) See the Production Certification link at http://www.ab.
Compact I/O Expansion Power Supplies 35 Additional Resources These documents contain additional information concerning related Rockwell Automation products.
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