Tait International Limited TBCH1A ユーザーズマニュアル

TB9400 Installation and Operation Manual

© Tait Limited April 2014

The PMU is designed to accept a nominal 12VDC, 24VDC or 48VDC 
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 3mm, 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 0.2V 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 18–20lbf·in (2–2.25N·m). 

a. The actual current consumption of the base station will be lower than these re-

quirements (refer to the Specifications Manual for more information).

b. For a length of 5ft to 6.5ft (1.5m to 2m) (typical).

12VDC

10VDC to 16.8VDC 60A

2AWG / 35mm

2

24VDC

20VDC to 33.6VDC 30A

5AWG / 16mm

2

48VDC

40VDC to 60VDC

15A

8AWG / 8mm

2

Circuit Breaker
or Fuse