User's Manual
Table Of Contents
- Installation and Operation Manual Draft in Progress
- Contents
- Preface
- 1 Description
- 2 General Safety and Regulatory Information
- 3 Operation
- 4 Working with Base Stations from Your PC
- 4.1 PC Recommendations
- 4.2 Connecting Your PC to the Base Station
- 4.3 Working with the Web Interface
- 4.4 Basic Tasks
- 4.4.1 User Settings
- 4.4.2 Taking the Base Station Offline
- 4.4.3 Troubleshooting Alarms
- 4.4.4 Working with Configuration Files
- 4.4.5 Configuring Single Base Stations
- 4.4.6 Configuring Base Stations in a Channel Group
- 4.4.7 Setting Up Custom Alarms
- 4.4.8 Disabling the Front Panel Keypad
- 4.4.9 Preparing to Download Firmware
- 5 Installation
- 6 Maintenance
- 7 Troubleshooting
- 8 Replacing Modules
- Appendix A – Interface Pin Allocations
- Appendix B – Inter-Module Connections
- TaitNet P25 Glossary
- Tait Software License Agreement
DRAFT 4
82 Installation TB9400 Installation and Operation Manual
© Tait Electronics Limited September 2011
5.6.3 Connecting DC Power
The PMU is designed to accept a nominal 12 VDC, 24 VDC or 48 VDC
input (depending on the model) with negative or positive ground. There is
a minimum DC startup threshold to prevent damaging a battery which has
little capacity left.
You must connect the DC supply from the battery to the PMU via a fuse or
DC-rated circuit breaker with a contact separation of 3 mm, and with the
appropriate rating, as shown in the table below. The DC input leads should
be of a suitable gauge to ensure less than 0.2 V drop at maximum load over
the required length of lead.
Terminate and insulate the DC input leads to protect them from accidentally
shorting to the subrack if the PMU is removed before the leads are
disconnected. Protective covers for the DC terminals are supplied with each
PMU.
We recommend a screw torque of 18 – 20 lbf · in (2 – 2.25 N · m).
Nominal Supply
Voltage
Input Voltage
Range
Circuit Breaker/
Fuse Rating
a
a. The actual current consumption of the base station will be lower than these require-
ments (refer to the Specifications Manual for more information).
Recommended
Wire Gauge
b
b. For a length of 5 ft to 6.5 ft (1.5 m to 2 m) (typical).
12 VDC 10 VDC to 16.8 VDC 60 A 2 AWG / 35 mm
2
24 VDC 20 VDC to 33.6 VDC 30 A 5 AWG / 16 mm
2
48 VDC 40 VDC to 60 VDC 15 A 8 AWG / 8 mm
2
Figure 5.8 Recommended DC power connection
Battery
Circuit Breaker
or Fuse
PMU