Codan-radio MT-4E Paging Manual do Utilizador descarregar pdf (Página 32)

USER GUIDE | MT-4E PAGING SYSTEMS

Chapter 3: MT-4E Paging System ComponentsPage 24

Power Input

The main power input (+10 to +17 Vdc; +13.8 Vdc nominal) connector is located at the back of the

subrack, on the motherboard. There is an identical +9.5 Vdc power output connector on the motherboard

that is used to power other Codan equipment at +9.5 Vdc (the CI-RC-4M-G2 controller for example).

NOTE: Do not connect the main power input to the +9.5 Vdc power output connector, as a transient

suppressor (over voltage protection) will short to ground to protect the equipment.

Reverse voltage protection and over voltage protection (transient suppressor) is provided at the main

power input as well as the +9.5 Vdc line. The main power input is protected with a standard fast-blow

15 amp fuse. These components may require replacing if the power supply is not connected properly,

or even after a power surge or a lightning strike. The two transient suppressors have different voltage

ratings for the main power input and +9.5 Vdc lines. Figure 3-16 shows the subrack / motherboard rear

view.

Figure 3-16: Subrack / Motherboard Rear View

A SIDE

BANK AND CHANNEL

SELECT JUMPERS

B SIDE

BANK AND CHANNEL

SELECT JUMPERS

POWER INPUT

+10 to +17 Vdc

+13.8 Vdc NOMINAL

15 AMP FAST

BLOW FUSE

(5604-5GAGC150)

+13.8 Vdc LINE

TRANSIENT SUPPRESSOR

(2007-1N637800) &

REVERSE VOLTAGE DIODE

(2001-MR751000)

+9.5 Vdc LINE

TRANSIENT SUPPRESSOR

(2007-1N637500) &

REVERSE VOLTAGE DIODE

(2001-MR751000)

+9.5 Vdc REGULATED

POWER INPUT /

OUTPUT

(NOT TYPICALLY USED)

CHANNEL SELECT

PULL-UP OR EXTERNAL

CONTROL JUMPERS

AUXILIARY

CONNECTORS

CHANNEL SELECT

PULL-UP OR

EXTERNAL

CONTROL

JUMPERS

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 53 54

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