Maintenance Guide

Cobham Wireless
idDAS Installation and Maintenance Guide 00109GU Rev. 2.0
Page | 15
1.4 Bespoke 12V DC Headend Elements
This section describes the bespoke headend elements supporting an external 12V DC power source: APOI,
MTDI, and MSDH. Aside from the 12V DC power source, the interfaces and operation of these elements are
identical to the standard elements as described in Section 1.3.
12V DC APOI Power Feed 1.4.1
12
V DC Feed
Equipment DC Power Feeding:
12V
DC, 3A max/feed
Power Interface Pins
(numbered from left to right):
Pin 1,2 Positive (+)
Pin 3,4 Negative (
-)
For 12V DC Feeding:
x Connect Pin 1,2 to 12V DC
x
Connect Pin 3,4 to RTN (0V)
Terminal Connector specification:
Nominal current:
8A, Rated voltage 160V
Be sure the power input does
not exceed 12V DC.
Figure 1-22. APOI 12V DC
Power Feed Rear
Panel
12V DC MTDI Power Feed 1.4.2
MTDI 12V
DC Feed
Equipment DC Power Feeding:
MTDI: 12V
DC, 10A max
Power Interface Pins
(numbered from left
to right):
Pin 1,2 Positive (+)
Pin 3,4 Negative (
-)
For 12V DC Feeding:
x Connect Pin 1,2 to 12V DC
x
Connect Pin 3,4 to RTN (0V)
Terminal Connector specification:
Nominal current:
8A, Rated voltage 160 V
ATTENTION! Be sure the power input
does not exceed 12V DC.
Figure 1-23. MTDI 12V DC Power Feed
12V DC, 10A Max
12V DC, 3A max