Dwyer BPS-015 User Manual

Bulletin PC-BPS

Model BPS-015 Low Cost DC Power Supply

Specifications - Installation and Operating Instructions

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The Series BPS Building Automation Power Supply is used to convert 24 VAC to a regulated DC power source for transmitters with 4 to 20 mA outputs. The output voltage can be field adjusted from 1.5V to 27V using a potentiometer. The 3A fuse protects the power supply from over-current conditions. The snap-on bracket can be quickly surface mounted to any flat surface.

CAUTION: TO PREVENT OVERHEATING, THE OUTPUT CURRENT MUST NOT EXCEED THE RATIO OF THE OUTPUT VOLTAGE TO THE INPUT VOLTAGE TIMES THE RATED CURRENT.

Example: For output voltage set at 5 VDC, the output current should not exceed 313 mA. (5V/24V) x 1.5A = 0.313A

Isolation: If the DC ground is connected to the AC ground, the fuse will open. If the AC and DC circuit grounds cannot be isolated, move the shorting jumper from J1 to J2 and add a shorting jumper to J3. In this case the output current is limited to 400 mA.

SPECIFICATIONS Input: 24 VAC/VDC 50/60 Hz. Output: 24 VDC (full wave rectified and regulated) adjustable 1.5 to 27

VDC. Maximum Current Output: 1.5A (de-rated to 400 mA for non-isolated circuits).

Operating Temperature: 32 to 130°F (0 to 55°C). Humidity Limits: 95% (non-condensing). Weight: 0.4 lb.

WIRING DIAGRAM

J1 J2

REGULATED

OUTPUT

VOLTAGE

ADJUSTMENT

DC VOLTAGE

OUTPUT

24 VAC IN

LINE VOLTAGE

TRANSFORMER

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com