Transition Networks’s wide input external power supplies allow you to provide a wide range of input voltages to power your stand-alone converters and chassis. Input voltages of 18 – 60VDC and 17 – 30VMRS allow for installation of any of Transition’s stand-alone media converters in most industrial, telecom and commercial applications, as well as HVAC and building control environments. Multiple form factors allow flexibility to meet your application. The stand-alone form factor can be used with all Transition stand-alone media converters as well as the single-slot and dual-slot Point System™ Chassis. The piggy back form factor allows the power supply to attach directly to the converter and eliminate the power cable commonly found between the power supply and the converter. Once the piggy back supply is attached to the converter, the combined assembly is much easier to wall mount or attach to DIN-rail environments than using a separate supply. Specifications

Input Voltage	18 – 60VDC; 24 – 30 VAC (RMS)
Isolation Voltage (Dielectric withstand)	Meets IEC 950 for one minute. 1,500 VAC: Output/Input 1,500 VAC: Input/Safety GND  1,500 VAC: Output/CASE
Output Voltage	12.6 VDC
Output Current	1.0A
Load Regulation	+/-0.5% at 10% load to full rated load
Over Load Protection (OLP)	When the average power rating exceeds 125% to 150% of maximum power, output voltages reduced to a safe dissipation level; protects against short circuit of any output
No Load Protection	No damage to power supply when operating at no load
Transient Protection	No voltage spike at power-on, power-off, or power failure
Power Distribution	+12.6VDC at 1.0 A maximum
Power Consumption	6 watts max. @ 18VDC input, 12.6VDC output
Noise and Ripple	+/-40mV peak-to-peak of output voltage (typical)
MTBF (Mean Time Before Failure)	Greater than 60,000 hours with typical load operating at 20°C temperature (calculated according to MIL-HDBK-217E)
Dimensions	SPS-1872-CC: Width: 4.6" [117 mm] Depth: 3.1" [79 mm] Height: 1.0" [25 mm]  SPS-1872-PS: Width: 4.6" [117 mm]  Depth: 3.4" [86 mm]  Height: 1.0" [25 mm] SPS-1872-DPS  Width: 4.6" [117 mm] Depth: 3.4" [86 mm] Height: 1.8" [46 mm] SPS-1872-SA:  Width: 3.9" [99 mm] Depth: 3.1" [79 mm] Height: 1.0" [25 mm]
Compliance	UL Listed EN60950; CISPR/EN55022 Class A; FCC Class A; CE Mark; EN55024
Shipping Weight	1 lb. [0.45 kg]
Environment	Operating: 0 – 50°C (32° – 122° F); Storage: -20 to +85°C Humidity: 5% – 95% non-condensing; Altitude: 0 – 10,000 ft.
Warranty	Lifetime