AC Power Supply Module Type 1 with Power Access (ACP-1PA)

Features and Benefits

  • 110VAC Input / 25.5VDC 25W Output Power Supply
  • Fully Sealed Enclosure (NEMA 4X, 6, 13 Protection)
  • -40°C to +65°C (-40°F to +149°F) Operating Range
  • MIL-S-901D Grade A for High Impact Shock
  • MIL-STD-167B for Vibration
  • MIL-STD-461E for Electro-Magnetic Interference (Pending)
  • Compatible with MIL-STD-1399 Section 300 Voltage Spike
  • Supports Hot Swapping
  • Multiple Modules Can be Paralleled to Provide Load Sharing, Uninterrupted Power During Hot Swap, and/or Redundant Power Sources

The Chameleon 25W AC Power Module with Power Access (ACP-1PA) isolates, filters, and converts an AC input source into a regulated DC output to power external devices.  The ACP-1PA is derived from the standard ACP-1 module.  The ACP-1PA is intended to serve as a power supply for external devices only.  The standard ACP-1 version is intended to serve as a power supply for other modules in a Chameleon node (these other modules may in turn feed external devices thru a lower power secondary regulated output).

Multiple power modules attached to each other and fed from different power sources can provide seamless redundancy, reducing susceptibility to power outages, or provide load sharing to increase the available power.  Power modules on the same node are always online—if one should lose input power, another will instantaneously compensate and deliver uninterrupted power to all loads.

ACP-1PA units are hot-swappable: should the need arise to replace one, simply swap the front panel (with attached power board) and the unit is back online—there is no need to shut off the power. When the module is swapped out, all storage capacitors are automatically discharged to prevent shocking hazard. The module also features input circuit fusing and automatic output over-current shutdown.

When all these features are combined, the ACP-1PA has the functionality to create a redundant expandable stand-alone DC power supply.  Simply add-on power modules to increase power output and/or redundant connections.

As with all Chameleon modules, the ACP-1PA offers unequaled ruggedness.  It is specifically designed for sustained operation in severe environments, including those characterized by extreme shock, vibration, electro-magnetic interference, temperature, and/or humidity.  Its fully-sealed enclosure (sealing end-caps not pictured) ensures long-lasting operation in the grimiest settings.  In fact, Chameleon modules can operate fully submerged.

Operating Ambient Temperature Range -40°C to 65°C
Storage/Transport Ambient Temperature Range -40°C to 85°C
High Impact Shock MIL-S-901D, Grade A
Mechanical Vibration MIL-STD-167B, 0-50Hz
Electro-Magnetic Interference MIL-STD-461E (Pending)
Facial/Housing Protection NEMA 1,2,4,4X,5,6,12,12K,13
Input Voltage Range 75-123VAC
Input Frequency 40 to 400Hz
Input Spike Tolerance 1000V  (2Ω source impedance)
Interface Standard MIL-STD-1399
Output Voltage Range 25.0-26.9VDC; 25.5VDC typical
Output Power 25 Watts
Output Isolation (Primary to Secondary) 1500 VAC
Maximum inrush current (115 VAC at Full Load) 12 A RMS for 5 ms
Maximum steady state input power (115 VAC at Full Load) 35 Watts
Power Factor (115 VAC at Full Load) 0.63
Turn-on time at 90 VAC 40 ms
Hold-up time at 90 VAC 30 ms
Input Fuse 1A rating, I2T=2.01 A2-sec
Supported Cable Diameters Two glands 0.24”-0.47”; two glands 0.16”-0.31”
Supported Wire Gauges 16-28 AWG
Status Readouts Power ON LED Indicator
Weight 1.5 lbs
Front Panel Dimensions 2.5” W x 6” L
Enclosure Height 3″ H

The following part numbers can be used when ordering the AC Power Supply Module Type 1 with Power Access (ACP-1PA).

The following base module part numbers include the enclosure with EMI wiring glands, active board, and wiring hub:

Fairmount Part Number


ACP-1PA or 01012-020

Chameleon 25W AC Power Module (Type-1) with Power Access


Spare/Replacement Parts:

Fairmount Part Number


11015-200 Chameleon 25W AC Power Module (ACP-1) Active Board and Half-Size Cover — Replacement faceplate for ACP-1 and ACP-1PA
11052-100 Chameleon 25W AC Power Module (ACP-1) with Power Access Wiring Hub Assembly — Replacement W/H for ACP-1PA