TB7100 Installation and Operation Manual Connections 67
© Tait Electronics Limited December 2005
DC Power 
Connection
The base station is designed to accept a nominal 13.8V DC, with negative 
ground.
The DC power connector (J105) at the rear of the base station is a heavy-
duty M4 screw terminal connector suitable for many forms of connection.
You must connect the DC supply from the battery to the base station via a 
readily accessible disconnect device such as a fuse or DC-rated circuit 
breaker with the appropriate rating, as shown in the table below. The DC 
input leads should be of a suitable gauge to ensure less than 0.2V drop at 
maximum load over the required length of lead. 
Terminate the DC input leads with a suitable crimp connector for attaching 
to the J105 M4 screws.
Ground Point The ground point is a terminal for grounding the tray to the mounting rack.
Pin Signal Name Signal Type Notes
1 13.8VDC input
2 ground input
external view
Nominal Supply 
Voltage
Input Voltage 
Range
Circuit 
Breaker/Fuse 
Rating
Recommended 
Wire Gauge
a
a. For a length of 1.5m to 2m (5ft to 6.5ft) (typical).
13.8VDC 10VDC to 16VDC 20A 8AWG / 8.35mm
2
Figure 6.3 Recommended DC power connection
Battery
TB7100
base station
Circuit Breaker
or Fuse