Sentry Model HM-535 Power Supply
Installation and Service Manual
430-535 0104 © 2004 Heritage MedCall, Inc.
2
1.0
INTRODUCTION
The Sentry Model HM-535 is a regulated DC power supply specifically designed to provide
low voltage to Sentry components. The power supply includes a battery charger and
diagnostic system with LED status indicators. An external battery (supplied) is connected
to provide backup power in the event of a power outage.
The power supply's diagnostic system communicates with the Sentry console. Messages
for power supply trouble and battery trouble will alert the operator of problems. The supply's
DC Output voltage can be controlled Off via reset signal from the master controller.
2.0
INSTALLATION
The Model HM-535 Power Supply Unit must be wall mounted with the cabinet hinge on the
left. The back surface includes four holes for mounting.
Adequate ventilation is essential. Install in a clean, dust-free and dry location. Keep a
distance of 4" from the sides, top and bottom to any wall, ceiling, or other object. Allow
ample space for the door to open.
NOTE: the unit will get hot to the touch and must be installed in a safe, non-confined
location. Never obstruct the air ventilation holes.
DC voltage and data wires are intended to run out of the cabinet through the knock-outs
in the right side. Install a wire clamp or grommet in the hole. The AC power cord or supply
wiring should run through the knock-out in the bottom or left side. Secure wiring with a
cable clamp.
All adjustments are preset at the factory. DO NOT attempt to make any adjustments to the
circuitry. Unauthorized adjustments will degrade system operation and void the warranty.
2.1
DEVICE ADDRESS
The Power Supply serial communication address code is preset to 63.
2.2
WIRING CONNECTIONS
1. Data:
Connect data line wires to the two screw terminal block on the right side of
the PCB. Follow the markings for: Data- & Data+.
2. DC:
The DC Output terminal block has four screw terminals. From top to bottom
the terminals are: OUT-, OUT+, OUT-, OUT+. The two OUT- terminals are
internally connected and the two OUT+ are internally connected.
3. AC:
120V AC line power is connected to the AC terminal block located on the left
of the PCB. From top to bottom the terminals connect to: Ground, Neutral,
Line. The Ground terminal is connected to the case.
