Codan NGT 2010 RF Technical & Service Manual page 839

1 2
2
A
3
2
B
1
C
D
Configuring the Interface Line Links
The interface circuits on the backplane can be set up for two or four line connections.
(The interface is set up at the factory for the appropriate number of lines, either 2-wire or
4-wire interface units).
If four lines are required, an additional dual line equalisation card (CODAN part no.
08-03905-002) can be fitted, allowing up to two more lines (refer CODAN drawing
08-05994). Unused lines should be disabled to prevent signal interference.
E Refer tables 1 & 2 for correct link configurations.
The lines are disabled by a link on the interface backplane PCB assembly 08-05995, as
shown in the Backplane View (below).
Lines one and two can be disabled by a link fitted to connector P6.
Lines three and four (if fitted) can be disabled by a link fitted to connector P105.
Note: The card is normally set up in the factory. You will only need to alter this if you add or
remove lines.
P105
F
+ C14
2u2
P103
4 3 2 1
C13
1OOn
4W Link 4
1a
J101
G
J1
1a 1n
P1
A
5V
D3
1N4004
1N4004
1n 1n 1n
D2 D1
1N4004
C7 C8
0V
H
P7
3 4 5
4
LINE LINE LINE
2 3
08-04644-001 08-03993
DETAIL A
TABLE 1
ENABLED
LINE 1
LINE 2
LINES 1 & 2
07-01348-03
P102
R1
4W Link 3 3k3 x 5
1a
P104 P101
J2
Line 4 Line 3
Rx Audio Bus 300 Hz Detect Bus
C104 C101
C103 C102 Tx Audio Bus
J301
1n
1a
1n
C4 C5
BACKPLANE VIEW
6 7
Fitting the Line Isolation Unit
(Refer to Detail A)
1. Remove 4 screws securing top and bottom covers on the 8571 Remote Control Interface and remove the covers.
2. If converting from an existing 4W configuration to a 2W configuration, remove 4 screws securing 4 wire interface
PCB assembly to chassis on appropriate line position. Disconnect loom from RCI backplane and withdraw unit.
Remove loom connector from Line X position of rear panel (where X is 1 - 4).
3. Fit type 8807 Line Isolation Unit 08-03816-001 to chassis with 2 screws.
4. Fit connector to Line X Position on RCI backplane corresponding to line being fitted.
5. Ensure line disable link(s) are in place on backplane PCB corresponding to number of lines fitted. (In accordance
with the Configuring the Interface Line Links instructions.
4
6. Fit top and bottom covers to 8571 Remote Control Interface and replace screws.
PARTS LIST
ITEM PART No.
1 08-03816-001 LINE ISOLATION UNIT SINGLE CH
2 08-04146-001 CABLE, 6 WAY
3 31-23012-582 SCREW, M3x12
4 60-00063-501 SOCKET, 6 WAY MODULAR WALL MOUNT
* 5 15-10509-001 FITTING INSTRUCTIONS
* 6 08-04284 CABLE
* ITEMS 5 & 6 ARE SUPPLIED AS PART OF THE KIT AND ARE NOT SHOWN.
TABLE 2
CONNECTOR P6 CONNECTOR P105
DISABLED JUMPER PINS ENABLED DISABLED
LINE 2 3-4 LINE 3 LINE 4
LINE 1 1-2 LINE 4 LINE 3
NONE 2-3 LINES 3 & 4 NONE
P6
C12 1n C10 1n
P4 C11 1n C9 1n
4 3 2 1 P3
4W Link 2 4W Link 1
P5 P2
L301
1n
Line 2 Line 1
P307
P302 P301 P305 P303
1n
P306 P304
C302 --- C314
C16
1n
100n
D4
2u2
1N4004
DIMENSIONS IN mm
8 9 10
DESCRIPTION QTY
1
1
2
1
1
1
JUMPER PINS
3-4
1-2
2-3
SCALE
DATE
GC
DRN 1-11-02
MATERIAL
GSB
CHKD 5/11/02
AJC
APPD 29-4-03
TOLERANCES
FINISH UNLESS OTHERWISE STATED
2 PLACES DEC.
REFER TO NOTES 1 PLACE DEC.
0 PLACE DEC.
11 12
FILE No.
C CODAN LIMITED, A.C.N. 007 590 605: 2002
TITLE
OPTION 2W 8571 (NGT)
FITTING INSTRUCTIONS
DRAWING/DOC NO.
A2 15-10509-001
±0.20
ISS
±0.5
1
SHT.
±1
3
1
OF