Technical Data · Publication 1756-TD005 · Rockwell Automation
1756 ControlLogix Power Supplies Specifications Technical Data
This technical data publication covers electrical, environmental and certification specifications for the 1756 ControlLogix power supplies: standard AC supplies (1756-PA72, 1756-PA75), standard DC supplies (1756-PB72, 1756-PB75, 1756-PC75, 1756-PH75), slim supplies (1756-PA50, 1756-PB50), ControlLogix-XT supplies, redundant supplies with their chassis adapters and power cables, and the power-load graphs used to size the supply transformer for a ControlLogix chassis.
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Specifications
Standard AC Power Supplies: Key Technical Specifications
| Input voltage range | 85…265V AC |
|---|---|
| Input voltage, nominal | 120V/240V AC |
| Input frequency range | 47…63 Hz |
| Output power, max (1756-PA72, 1756-PA75) | 75 W @ 0…60 °C (32…140 °F); combined output of all backplane voltages |
| Output power, max (1756-PA50) | 60 W @ 0…50 °C; 50 W @ 0…60 °C |
| Current capacity @ 1.2V DC | 1.5 A |
| Current capacity @ 3.3V DC (1756-PA72, 1756-PA75) | 4 A |
| Current capacity @ 5.1V DC (1756-PA72) | 10 A |
| Current capacity @ 5.1V DC (1756-PA75) | 13 A |
| Current capacity @ 24V DC (1756-PA72, 1756-PA75) | 2.8 A |
| Inrush current, max | 20 A |
| Isolation voltage (1756-PA72, 1756-PA75) | 250V continuous, Reinforced Insulation Type; type tested at 3500V DC for 60 s |
| Wire size | 2.5 mm² (14 AWG) solid or stranded copper, rated 90 °C (194 °F) or greater |
| Conductor screw torque | 0.565 N•m (5 lb•in) |
| Weight, approx (1756-PA72, 1756-PA75) | 0.95 kg (2.10 lb) |
| Dimensions HxWxD (1756-PA72, 1756-PA75) | 14.0 x 11.2 x 14.5 cm (5.51 x 4.41 x 5.71 in.) |
| Module location | Left side of 1756 chassis |
| Compatible chassis | 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 |
| North American temperature code | T4 |
| Enclosure type rating | None (open-style) |
Standard DC Power Supplies: Key Technical Specifications
| Input voltage range (1756-PB50, 1756-PB72, 1756-PB75) | 18…32V DC |
|---|---|
| Input voltage, nominal (1756-PB50, 1756-PB72, 1756-PB75) | 24V DC |
| Input voltage range (1756-PC75) | 30…60V DC |
| Input voltage, nominal (1756-PC75) | 48V DC |
| Input voltage range (1756-PH75) | 90…143V DC |
| Input voltage, nominal (1756-PH75) | 125V DC |
| Output power, max (1756-PB72, 1756-PB75, 1756-PC75, 1756-PH75) | 75 W @ 0…60 °C (32…140 °F) |
| Hold up time (1756-PB72 @ 18V DC) | 35 ms |
| Current capacity @ 5.1V DC (1756-PB72) | 10 A |
| Current capacity @ 5.1V DC (1756-PB75) | 13 A |
| Isolation voltage (1756-PB72, 1756-PB75, 1756-PC75, 1756-PH75) | 250V continuous, Reinforced Insulation Type; type tested at 3500V DC for 60 s |
ControlLogix-XT Power Supplies: Key Technical Specifications
| Operating temperature | -25 °C < Ta < +70 °C (-13 °F < Ta < +158 °F) |
|---|---|
| Input voltage range (1756-PAXT, 1756-PA30XT) | 85…265V AC |
| Input voltage, nominal (1756-PAXT, 1756-PA30XT) | 120/240V AC |
| Input voltage range (1756-PBXT, 1756-PB30XT) | 18…32V DC |
| Input voltage, nominal (1756-PBXT, 1756-PB30XT) | 24V DC |
| Output power, max (1756-PAXT) | 42 W @ -25…+70 °C (-13…+158 °F) |
| Output power, max (1756-PBXT) | 52 W @ -25…+70 °C (-13…+158 °F) |
| Output power, max (1756-PA30XT, 1756-PB30XT) | 30 W @ -25…+70 °C (-13…+158 °F) |
| Compatible XT chassis | 1756-A4LXT/B, 1756-A5XT/B, 1756-A7LXT/B, 1756-A7XT/B, 1756-A7XT/C, 1756-A10XT/C |
Redundant Power Supplies: Key Technical Specifications
| Input voltage range (1756-PA75R) | 85…265V AC |
|---|---|
| Input voltage, nominal (1756-PA75R) | 120V/240V AC, 50/60 Hz |
| Input voltage range (1756-PB75R) | 18…32V DC |
| Input voltage, nominal (1756-PB75R) | 24V DC |
| Output power, max | 75 W @ 0…60 °C (32…140 °F) |
| Input power, max (1756-PA75R) | 120VA / 115 W |
| Current capacity @ 5.1V DC | 13 A |
| Current capacity @ 24V DC | 2.8 A |
| Annunciator power (1756-PA75R) | 240V AC 50/60 Hz, 240V DC, 50 mA, resistive only |
| Isolation voltage | 250V continuous, Reinforced Insulation Type; type tested at 3250V DC for 60 s |
| Dimensions HxWxD | 17.5 x 14.5 x 13.7 cm (6.9 x 5.7 x 5.4 in.) |
| Weight, approx | 1.45 kg (3.2 lb) |
| North American temperature code (1756-PA75R) | T3C |
| North American temperature code (1756-PB75R) | T4 |
| Redundant system components | 2 redundant supplies, 2 redundant power supply cables (1756-CPR2, -CPR2D or -CPR2U, 0.91 m), 1 chassis adapter (1756-PSCA2, -PSCA2K or -PSCA2XT) |
Common Environmental Specifications
| Operating temperature (standard and redundant supplies) | 0…60 °C (32…140 °F) |
|---|---|
| Operating temperature (XT supplies) | -25 °C < Ta < +70 °C (-13 °F < Ta < +158 °F) |
| Nonoperating temperature | -40…+85 °C (-40…+185 °F) |
| Relative humidity | 5…95% noncondensing |
| Vibration | 2 g @ 10…500 Hz |
| Shock, operating | 30 g |
| Shock, nonoperating | 50 g (30 g max when used with a Series C chassis) |
| Emissions | IEC 61000-6-4 |
| ESD immunity | 6 kV contact discharges; 8 kV air discharges |
| EFT/B immunity | ±4 kV at 5 kHz on power ports |
| Surge transient immunity | ±1 kV line-line (DM) and ±2 kV line-earth (CM) on power ports |
Certifications & Compliance
UL Listed Industrial Control Equipment, UL File E65584 (scope varies by model; see each certification table)
c-UL-us Class I, Division 2 Group A,B,C,D Hazardous Locations, UL File E194810 (1756-PA50, 1756-PB50, ControlLogix-XT and redundant supplies)
CSA Certified Process Control Equipment, CSA File LR54689C, and Class I, Division 2 Group A,B,C,D, CSA File LR69960C (1756-PA72/PA75, 1756-PB72/PB75 and redundant supplies)
FM Approved for Class I Division 2 Group A,B,C,D Hazardous Locations (models as listed in each certification table)
CE: EU 2014/30/EU EMC Directive and 2014/35/EU LVD
UKCA: UK Statutory Instruments 2016 No. 1091, 1101, 1107 and 2012 No. 3032
Ex (ATEX): II 3 G Ex ec IIC T4 Gc, UL 22 ATEX 2819X (24V DC models: 1756-PB50, 1756-PBXT, 1756-PB30XT, 1756-PB75R)
IECEx: IECEx UL 22.0064X (same 24V DC models)
UKEX: UL22UKEX2605X, Zone 2 (same 24V DC models)
RCM: Australian Radiocommunications Act, EN 61000-6-4
KC: Korean Registration of Broadcasting and Communications Equipment, Radio Waves Act Article 58-2 Clause 3
EAC: TR CU 020/2011 EMC; TR CU 004/2011 LV
CCC: 2020122309111830, 2020122309111998, 2020122309113868; CNCA-C23-01
Document Contents
Full PDF covers the following topics in detail:
- Summary of Changes
- Standard AC Power Supplies: mounting dimensions, technical, environmental and certification specifications
- Standard DC Power Supplies: mounting dimensions, technical, environmental and certification specifications
- 1756 ControlLogix-XT Power Supplies: technical, environmental and certification specifications
- Redundant Power Supplies: system configuration, mounting dimensions, features, technical, environmental and certification specifications
- ControlLogix-XT Redundant Power Supplies: technical, environmental and certification specifications
- Redundant Power Supply Chassis Adapters (1756-PSCA2, 1756-PSCA2K, 1756-PSCA2XT)
- Power Load and Transformer Sizing: power-load graphs for each supply
- Additional Resources
Frequently Asked Questions
How much power can a 1756-PA72 supply to the ControlLogix backplane?
The 1756-PA72/C provides 1.5 A at 1.2V DC, 4 A at 3.3V DC, 10 A at 5.1V DC and 2.8 A at 24V DC. The combined output of all four backplane voltages can't exceed 75 W, from 0 to 60 °C.
What chassis are compatible with the standard 1756 ControlLogix power supplies?
The standard power supplies mount on the left side of the 1756-A4, 1756-A7, 1756-A10, 1756-A13 and 1756-A17 chassis. Series A, B and C chassis compatibility varies by catalog number, as listed in each technical specification table.
What input voltage ranges do the standard AC and DC power supplies accept?
Standard AC power supplies accept 85…265V AC at 47…63 Hz (Rockwell Automation specified range), 120V/240V AC nominal. The 24V DC models (1756-PB50, 1756-PB72, 1756-PB75) accept 18…32V DC, the 1756-PC75 accepts 30…60V DC (48V DC nominal), and the 1756-PH75 accepts 90…143V DC (125V DC nominal).
What operating temperature range do the ControlLogix-XT power supplies support?
The ControlLogix-XT power supplies (1756-PAXT, 1756-PA30XT, 1756-PBXT, 1756-PB30XT) are rated -25…+70 °C (-13…+158 °F). When used with FLEX I/O-XT products, the complete system covers -20…+70 °C (-4…+158 °F).
What components are required to build a redundant power supply system?
Two redundant power supplies (1756-PA75R, 1756-PA75RK, 1756-PAXTR, 1756-PB75R, 1756-PB75RK or 1756-PBXTR), two redundant power supply cables (1756-CPR2, 1756-CPR2D or 1756-CPR2U, each 0.91 m [3 ft] long), and one redundant power supply chassis adapter (1756-PSCA2, 1756-PSCA2K or 1756-PSCA2XT). Annunciator wiring is optional and user-supplied.
What do the redundant power supplies add compared to the standard supplies?
Redundant operation, automatic chassis load sharing between the two supplies, status indicators for the pair, and a solid-state relay that reports supply status when wired to an input module.
How do I size the transformer for a ControlLogix chassis?
Add up the backplane power draw (in watts) of all planned modules, using the ControlLogix Selection Guide, publication 1756-SG001. Then find that backplane load on the power-load graph for your power supply in this publication and read the corresponding real (input) power, which is the power the supply consumes.
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