American Innovations Bullhorn EPS3AH User manual

External Power Supply - EPS3AH
Installation Guide

AMERICAN INNOVATIONS, LTD.
Bullhorn™ External Power Supply - EPSAH
Installation Guide
©American Innovations, Ltd.
http://www.amerinnovations.com/
12211 Technology Blvd • Austin, TX 78727
Phone: [phone] • Fax: [phone]

Information in this document is subject to change without notice.
© 1999-2002 American Innovations, Ltd. All rights reserved.
Reproduction in any manner whatsoever without the written permission
of American Innovations is strictly forbidden.
Trademarks used in this text: the American Innovations’ logo, icon, and
Bullhorn logo and icon are trademarks of American Innovations, Ltd.
Other trademarks and trade names may be used in this document to
refer to either the entities claiming the marks and names or their
products. American Innovations, Ltd. disclaims any proprietary interest in
trademarks and trade names other than its own.
May 17, 2002 Part No. 122068-000, Rev. 0

External Power Supply-EPS3AH Installation Guide v
Table of Contents
Chapter 1. Before You Start . . . . . . . . . . . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Getting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting the External Power Supply . . . . . . . . . . . . . . . . . . . . 5
Connecting the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Connecting Signal Output Wires . . . . . . . . . . . . . . . . . . . . . . . . 7
Connecting the Low Battery Alarm . . . . . . . . . . . . . . . . . . . . . . 9
To Connect the Solar Panel Charger . . . . . . . . . . . . . . . . . . . . 10
Reconnecting the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Appendix A. Wiring Diagrams . . . . . . . . . . . . . . . . . . . 13
Appendix B. Technical Specifications . . . . . . . . . . . 15
List of Tables and Figures
Table 1. Load and Reserve Time . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1. External Power Supply Dimensions . . . . . . . . . . . . . 5
Figure 2. External Power Supply . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

External Power Supply-EPS3AH Installation Guide 1
Chapter 1
Before You Start
This guide explains how to install the Bullhorn External Power Supply-
EPS3AH. The information is intended for service technicians who are
also installing the Bullhorn APM4AMR03.
Use this guide in conjunction with the installation instructions provided
in the “APM4AMR03 Installation and Configuration Guide”. A copy of
the manual is available for download on the “Technical Help and
Support Files” web page on the Bullhorn web site.
Note: Certain terms are used throughout this guide in reference to
specific equipment. “External power supply” refers to the Bullhorn
External Power Supply – EPS3AH, “unit” refers to the APM4AMR03
model and “transmitter” refers to a low power transmitter (such as the
Druck® PDCR 143 pressure transmitter).
Introduction
The external power supply is a device that functions as an interface
between the APM4AMR03 and a low power transmitter. It consists of a
waterproof enclosure that houses an interface board and a 12V DC lead
acid battery that is trickle charged by the Bullhorn solar panel charger.
The interface board supports input connections for up to four
transmitters, a low battery alarm output, and a Bullhorn solar panel
charger. As an option, the solar panel charger can also be used to charge
the battery on the APM4AMR03.

2 Chapter 1. Before You Start
The external power supply provides a nominal 12V DC at 0.008A power
for up to 15 days without recharging. The Bullhorn solar panel charger
maintains the charge on the battery when conditions are suitable. The
maximum current available is limited by a fuse to 0.500A. Operating the
Bullhorn external power supply beyond this limit will cause the fuse to
open. Operating at this limit for an extended period of time can also
cause the fuse to open.
The amount of time the transmitter load can run off of the external
power supply with no solar charging (reserve time) can be determined
using the information in the following table.
Table 1. Load and Reserve Time
Required Tools
The following list identifies tools required for the installation:
Small and large flat head screwdrivers
Small Phillips head screwdriver
10mm socket wrench
Adjustable wrench
Wire strippers
Wire cutters
Appropriate tools for preparing the mounting surface for
installation of the external power supply.
2-conductor shielded twisted pair cable such as Alpha 2463C. A
multi-conductor cable of appropriate wire gauge and rating can
also be used. Amount required is determined by the distance of
the transmitter from the APM4AMR03.
Load Reserve Time
8 mA 15 Days
20 mA 6 Days

External Power Supply-EPS3AH Installation Guide 3
Getting Technical Support
If you need assistance with the installation, contact American
Innovations (AI) Technical Support in any of the following ways:
Telephone: [phone]
Email: [email protected]
Fax: [phone]
ATTN: Technical Support Department
Mail: American Innovations, Ltd.
ATTN: Technical Support Dept.
12211 Technology Blvd.
Austin, TX 78727

4 Chapter 1. Before You Start

External Power Supply-EPS3AH Installation Guide 5
Chapter 2
Installation
The information in this chapter explains how to install the Bullhorn
external power supply.
Mounting the External Power Supply
The external power supply should be installed within 3 feet (1 meter) of
the APM4AMR03. The length of the signal cable that connects the
external power supply to the APM4AMR03 should also be kept as short
as possible to maintain signal integrity.
Depending on the type of mounting surface, use appropriate hardware
to firmly secure the external power supply in place. Use the information
in the following figure to help determine where to mount the external
power supply.
Figure 1. External Power Supply Dimensions
6 1/16
inches
Cabinet Depth: 5.25 inches
6 13/16 inches
(width)
Front View Cabinet Mounting Hole
.31 inches diameter
(4 places)
8.5 inches
(length)

6 Chapter 2. Installation
Connecting the Transmitter
Complete the following steps to connect the transmitter to the external
power supply:
1. If connected, disconnect the battery cable from the 2-pin
connector labeled “Battery” on the interface board. Refer to
Figure 2.
Note: Do not disconnect wires from the power supply.
Figure 2. External Power Supply
2. Route the transmitter cable through the bottom fitting on the
external power supply and toward the terminal block labeled
“Sensor #1” through “Sensor #4”.
3. Prepare the transmitter cable for installation using the following
steps:
a. Cut excess cable length and remove 3 inches from the outer
jacket.
b. Strip ¼to ½inch of insulation from each wire.
4. Connect the transmitter cable in the “Sensor 1” terminal using
the following steps:
a. Insert the positive (+) transmitter wire in the terminal labeled
“Power +”. Secure the terminal using a small screwdriver.
12V Power Supply
Bottom Fitting
Interface Board
Sensor Power & Inputs
Signal Outputs
Battery Input
Solar Panel Input
Low Battery Alarm Output