Altronix T28140D Installation Instructions

T28140D - Open Frame Transformer

F

A

B

D

C

E

H

G

PRIMARY - 115VAC 50/60Hz

Black

Lead

White

Lead

Blue
Lead

Red

Lead

PRIMARY - 230VAC 50/60Hz

Black

Lead

White

Lead

Blue
Lead

Red

Lead

SECONDARY - 28VAC

Black

Lead

Brown

Lead

Overview:

T28140D transformer converts 115VAC or 230VAC 50/60Hz to 28VAC for powering low voltage devices.
Maximum power output is rated @ 6.25 amp.

Specification Chart:

Model #

Input (Primary) Output (Secondary)

T28140D

115VAC (1.6 amp) or 230VAC (0.8 amp) 50/60Hz 28VAC/175VA (6.25 amp)

Installation Instructions:

1. Mount transformer in desired location/enclosure (refer to Transformer Dimensions below).

2. Connect 115VAC or 230VAC to the primary leads (refer to Wiring Configuration below).

3. Measure output voltage across the secondary leads Black and Brown before connecting devices. This helps avoid
potential damage (open circuit voltage is approx. 30.4VAC @ 115VAC input) (refer to Wiring Configuration below).

4. Connect 28VAC device(s) to the secondary leads Black and Brown (refer to Wiring Configuration below).

WARNING: This installation should be made by qualified service personnel and should
conform to all local codes and in accordance with the National Electrical Codes.

Wiring Configuration:

Fig. 1

Transformer Dimensions:

Model # A B C D E F G H Approx. Ship Wt.

T28140D 3.14” 3.78” 3.12” 1.52” 3” 2.52” 2.448” 3.05” 5.8 lbs.

Altronix is not responsible for any typographical errors. Product specifications are subject to change without notice.

140 58th Street, Brooklyn, New York 11220 USA, 718-567-8181, fax: [phone]
website: www.altronix.com, e-mail: [e-mail], Made in U.S.A.
IIT28140D - Rev. 061810 F28J