Power Supplies Power requirement■Ordering For 2-Wire Flat Packs -1: 115V AC, ±10%, 50/60Hz Information -2: 230V AC, ±10%, 50/60Hz -10: 10 to 36V DC. Current draw is a function of the 25PS-20-1-DIN-NCR supply voltage. Power supply, 115V AC power, DIN rail mounting. Supply voltage Current (-10 option) 25PS-20-1-SM-NCR 10V 175mA Same as above, except surface mounting. 12V 140mA 25PS-20-1-ST-NCR 15V 110mA Same as above, except Snaptrack mounting. 24V 70mA 36V 70mA 25PS-20-2-DIN-NCR Ambient temperature range Power supply, 230V AC power, DIN rail mounting. -13 to 185°F (-25 to 85°C) 25PS-20-2-SM-NCR Isolation Same as above, except surface mounting. Power supplies can sustain a 1500V AC isolation 25PS-20-2-ST-NCR breakdown test between power and output. This Same as above, except Snaptrack mounting. complies with test requirements outlined in ANSI/ISA- S82.01-1988 for the voltages specified. 25PS 25PS-20-10-DIN-NCR Power output protection Power supply, 10 to 36V DC power, DIN rail mounting. Power Supplies Overcurrent protection: Supply is current limited at 25PS-20-10-SM-NCR 30mA (nominal) and can sustain a continuous short These low-cost units provide power to one Same as above, except surface mounting. circuit. 4 to 20mA two-wire transmitter. 25PS-20-10-ST-NCR Overvoltage protection: Supply is voltage limited at Same as above, except Snaptrack mounting. 30V DC (nominal). The 25PS series power supply features compact Redundancy: Output is diode-coupled, allowing sup- packaging and supports high-density mounting plies to be connected in parallel for systems requiring on DIN rails, snaptracks, or any flat surface. automatic redundancy. Redundant design, with direct coupled output, Power indicator allows connection of back-up power supplies to Green LED status lamp indicates power applied. the same loop. An LED indicates power is sup- RFI resistance plied to the receiving unit and a load current Less than ±0.5%, of output span effect with RFI field strengths of up to 10V/meter at frequencies of 27, sense point enables easier field diagnostics. 151 and 467 MHz. EMI resistance ■Performance Less than ±0.25% of output span effect with switch- Output ing solenoids or commutator motors. Excitation supply for a 4 to 20mA transmitter. Isolated Surge withstand capability (SWC) output is 24V DC, nominal, and current limited to Power/output terminations rated per ANSI/IEEE 30mA DC. DC-powered units (-10) include reverse C37.90-1978. Unit is tested to a standardized test polarity protection. waveform that is representative of surges (high fre- On AC-powered units, filtered DC output is provided. quency transient electrical interference), observed in Ripple is less than 2V peak-to-peak maximum. This actual installations. ripple is rejected by the two-wire transmitter and does Construction not appear across the load resistor.. Circuit boards: Military grade FR-4 epoxy glass. Output load (AC-powered -1, -2 units only) Terminals: Compression type, 14 AWG max. AC-powered units include a 250 ohm load resistor Case: Self-extinguishing NYLON Type 6.6 polyamide (0.1%, 0.5W, ±25ppm/°C) internally connected thermoplastic UL94V-2, color black. General Purpose, between the DC output and negative terminals of the NEMA Type 1 enclosure. supply. This resistor can be used to monitor the loop Mounting position: Position insensitive. current by connecting the two-wire transmitter loop between the positive and DC output terminals while monitoring the voltage drop across this load (1 to 5V DC for 4 to 20mA loop current). Tel: 248-624-1541 Fax: 248-624-9234 e-mail: sales@acromag.com www.acromag.com 186 Pwr Supply Power Supplies Dimensions 25PS and 35PS-2U power supply models 35PS-8U power supply Tel: 248-624-1541 Fax: 248-624-9234 e-mail: sales@acromag.com www.acromag.com 188 Pwr Supply