Bulletin PC-BPS-005
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 1.5 VDC to 29 VDC
using a potentiometer. The 1 A or 3 A fuse (depending on model) protects
the power supply from over-current conditions. The snap-on bracket can
be quickly surface mounted to any flat surface.
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 out-
put current is limited to 400 mA
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
SPECIFICATIONS
Input: 24 VAC/VDC 50/60 Hz.
Output: 24 VDC (full wave rectified and regulated) adjustable 1.5 to 29
VDC.
Maximum Current Output: 1.5 A or 0.5 A (depending on model).
Over-Current Protection: 1 A fuse.
Operating Temperature: 32 to 130°F (0 to 55°C).
Humidity Limits: 95% (non-condensing).
Weight: 0.4 lb.
Agency Approval: RoHS.
Specifications - Installation and Operating Instructions
Series BPS Low Cost DC Power Supply
SNAPTRACK
4-1/16
[103.12]
2
-19/64
[
58.17]
1-15/16
[49.02]
1
1/16
[
17.27]
©Copyright 2012 Dwyer Instruments, Inc. Printed in U.S.A. 2/12 FR# R6-443738-00
OUTPUT
VOLTAGE
ADJUSTMENT
REGULATED
DC VOLTAGE
OUTPUT
LINE VOLTAGE
TRANSFORMER
J1
J2
J3
24 VAC IN
WIRING DIAGRAM
For applications where the input and output share the common
or ground, add a jumper on BPS-005 between “G” on the input
and “-” on the output and cut one of the leads on diode (D3). On BPS-015, move
jumper from “J1” to “J2” amd short jumper “J3”. Output is reduced to 200 mA on the
BPS-005 and 400 mA on the BPS-015.
NOTICE
To prevent overheating, the output current must not exceed the
ratio of the output voltage to the input voltage times the rated cur-
rent
.
CAUTION
MODEL BPS-005
MODEL BPS-015
2-13/32
[61.19]
3
[76.20]
2
-1/16
[
52.28]
1
9/32
[
14.97]
4
-1/16
[
103.12]
2
-19/64
[
58.17]
1
-15/16
[
49.02]
11/16
[17.27]
/
