IM-AIB-100/400-2.6 - Harding Instruments

IM-AIB-100/400-2.6 - Harding Instruments
MicroComm DXI
INSTALLATION
INSTRUCTIONS
AIB-100/400 Audio Input Board
1.
Intent & Scope
This document describes the installation procedure for the AIB-100 and AIB-400 Audio Input Boards.
2.
Description
The AIB-100/400 Audio Input Board accepts up to eight audio input signals from external sources such as radio
tuners, tape decks, microphones, telephone system interface modules, and two-way radio systems. The signal
levels can range from low-level microphone levels to nominal 1-volt peak line level signals. Audio levels for each
input can be adjusted separately by software control. Positioning jumpers on the AIB-400 printed circuit board
allows a dc bias voltage to be placed on the audio lines and permits either an electret or phantom powered
microphone to act as an audio input source. The AIB-100 is used in systems that use SAB-100 Station Audio
Boards, while the AIB-400 is used in systems that use either the SAB-300, SAB-400 or SAB-401 Station Audio
Boards.
Each input channel is provided with an input control signal interface (an Enable signal) and a relay contact
output. The relay contacts can be configured as either a normally open or a normally closed contacts.
AIB-100
Document IM-AIB-100/400-2.6
© 1999 Harding Instruments - Printed in Canada
AIB-100/400 Audio Input Board
JP6
CN1
CN2
34
18
1
CN3
CN4
Status
#1
DB-50 Input
Connector
CN5
CN6
#2
33
17
CN8
50
CN7
#3
JP67
Service
AIB
400
AIB-400 Showing DB-50 Connector, Location of CN1 ... CN8, and Location of JP6 ... JP67
3.
Input Channels
Each input channel consists of:
two audio input terminals and a shield terminal (connected to Gnd)
one enable-input terminal (used with a common ground Gnd on pins 49 and 50 of the terminal block or
the audio shield)
two terminals that provide either a normally open or a normally closed relay output
Page 2
Document IM-AIB-100/400-2.6
AIB-100/400 Audio Input Board
3.1
Audio Input
Each audio input to the AIB can be set independently for line, electret microphone, or phantom powered
microphone inputs. The AIB inputs can be configured for the various possibilities by placing appropriate jumpers
in the headers JP6 ... JP67. The headers are arranged in groups, each group is associated with one of the input
channels. The diagram above of the AIB-400 shows the physical location of the eight groups. The top group of
headers JP6 ... JP13 corresponds to channel 1, the second group of headers JP14 ... JP21 correspond to channel 2, ...
the eighth group JP60 ... JP67 correspond to channel 8. The following diagram for a group indicates how the
jumpers are arranged for the various possible input sources.
Line=A,B
Electret=A,B,C,D
Phantom=E,F,G,H
ABCD
EFGH
Jumper Block for Audio Inputs
The connection for Line Input is used for line level inputs (1 volt peak). The input circuitry is changed by
inserting the appropriate jumpers. The Electret and Phantom powered microphone inputs provide a dc bias
voltage to the input circuitry to power the microphones.
In the software configuration, the input can be set for Line or Microphone. The Microphone input setting
provides an additional gain of 20 (26dB) compared to the Line setting. Additional gain adjustments can be made
by the Initial Sensitivity parameter in the software configuration for the station.
3.2
Enable Input
The Enable Input is activated by connecting a low resistance between the Enable-input terminal and ground
(Gnd). The Gnd connection can be made to the audio shield ground or the common ground pins 49 or 50 on the
terminal blocks. Any resistance value less than 2.4 K ohms will be detected as a logical '0' input signal, while any
resistance value greater than 200 K ohms will be detected as a logical '1' signal. The Enable signal is available to
the DXI system.
3.3
Relay Outputs
With each channel, a two terminal relay output is available. Using a jumper, the relay output can be configured to
act as either a normally open or a normally closed contact. Each channel can be configured independently. The
header CN1 is associated with Relay Output 1, CN2 with Relay Output 2 ... CN8 with Relay Output 8. The
following diagram shows the position of the two terminal jumper for the two possible output configurations.
Connecting a jumper between pin 2 and pin 3 of the CNX (X=1 ... 8) connector makes a normally open contact
Document IM-AIB-100/400-2.6
Page 3
AIB-100/400 Audio Input Board
output. Connecting a jumper between pin 2 and 1 makes a normally closed contact output. (The diagram on the
left is on the printed circuit board and indicates the jumper position for the normally open or normally closed
configuration.)
Common Output
N.C.
Com
N.O.
Relay Output
1
2
3
N.C.
N.O.
CN1
Relay - Showing Jumper Positions for Normally Open or Normally Closed Output
4.
Field Interface Cable
The Audio Input Boards require a CBL-120 cable to connect from the board’s DB-50 connector to the terminal
block. The terminal block acts as the interface to the field wiring. The CBL-120 cable incorporates two 4 pair
shielded twisted pair audio cables plus two 6 pair unshielded cables. The unshielded wires provide control input
and status output signals for each channel. The field wiring from the terminal blocks should not exceed 2500 feet
(750 meters).
The DB-50 female connector is located at the rear of the AIB-100/400. The connector position is shown on the
figure on page 2.
The table on the following page gives the pin numbers, wire colors, and terminal block position for each of the
audio input signals when a CBL-120 cable is used. The cable should be terminated at the terminal block in the
fashion shown on the next page. One 4 pair shielded audio cable and one 6 pair unshieled cable are taped
together and labeled CONN 1, the other two cables are taped together and labeled CONN 2. The CONN 1 group
is associated with channels 1-4, while the CONN 2 group is used for channels 5-8.
The audio lines for the field wiring should be shielded twisted 22 gauge pairs. The shields should be connected to
the terminal block shield terminals and the shield should be left open at the other end of the audio line.
Page 4
Document IM-AIB-100/400-2.6
AIB-100/400 Audio Input Board
DB-50
Pin Number
1
18
34
2
19
35
3
20
36
4
21
37
5
22
38
6
23
39
7
24
40
8
25
41
9
26
42
10
27
43
11
28
44
12
29
45
13
30
46
14
31
47
15
32
48
16
33
49
17
50
Signal Name
Wire Color
4 Pair Shielded
Audio 1 +
Audio 1 Audio 1 Shield (Gnd) / Input Common 1
Enable Input 1
Relay Common 1
Relay Output 1
Audio 2 +
Audio 2 Audio 2 Shield (Gnd) / Input Common 2
Enable Input 2
Relay Common 2
Relay Output 2
Audio 3 +
Audio 3 Audio 3 Shield (Gnd) / Input Common 3
Enable Input 3
Relay Common 3
Relay Output 3
Audio 4 +
Audio 4 Audio 4 Shield (Gnd) / Input Common 4
Enable Input 4
Relay Common 4
Relay Output 4
Audio 5 +
Audio 5 Audio 5 Shield (Gnd) / Input Common 5
Enable Input 5
Relay Common 5
Relay Output 5
Audio 6 +
Audio 6 Audio 6 Shield (Gnd) / Input Common 6
Enable Input 6
Relay Common 6
Relay Output 6
Audio 7 +
Audio 7 Audio 7 Shield (Gnd) / Input Common 7
Enable Input 7
Relay Common 7
Relay Output 7
Audio 8 +
Audio 8 Audio 8 Shield (Gnd) / Input Common 8
Enable Input 8
Relay Common 8
Relay Output 8
Gnd
Gnd
Black
Red
BR Shield
Wire Color*
6 Pair Unshielded
White-Blue
Blue-White (Blue)
White-Orange
Black
White
BW Shield
Orange-White (Orange)
White-Green
Green-White (Green)
Black
Green
BG Shield
White-Brown
Brown-White (Brown)
White-Grey
Black
Blue
BBl Shield
Grey-White (Grey)
Red-Blue (Red)
Blue-Red
Black
Red
BR Shield
White-Blue
Blue-White (Blue)
White-Orange
Black
White
BW Shield
Orange-White (Orange)
White-Green
Green-White (Green)
Black
Green
BG Shield
White-Brown
Brown-White (Brown)
White-Grey
Black
Blue
BBl Shield
NC
NC
Grey-White (Grey)
Red-Blue (Red)
Blue-Red
NC
NC
Terminal
Block
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
*Note: Two variations of the cable are manufactured. One variation is for the both wires of a pair to be striped i.e.
the first pair consists of a white/blue striped wire and a blue/white striped wire. A second variation is for each
cable pair to consist of a solid color wire and a striped wire i.e. the first pair has a solid blue wire and a
blue/white striped wire (the solid color for the pair is shown in brackets).
Document IM-AIB-100/400-2.6
Page 5
AIB-100/400 Audio Input Board
4.
System Planning Worksheet
The following page contains a blank system planning worksheet for the AIB-100/400 Audio Input Board. It
contains a cross reference that includes the I/O board’s mating connector, pin signal identification, field wiring
cable conductor color, terminal block terminal point, and space to identify the field connection.
Page 6
Document IM-AIB-100/400-2.6
AIB-100/400 Audio Input Board
Card Cage: ___________________________________
DB-50
Pin Number
1
18
34
2
19
35
3
20
36
4
21
37
5
22
38
6
23
39
7
24
40
8
25
41
9
26
42
10
27
43
11
28
44
12
29
45
13
30
46
14
31
47
15
32
48
16
33
49
17
50
Signal Name
Audio 1 +
Audio 1 Audio 1 Shield (Gnd) / Input Common 1
Enable Input 1
Relay Common 1
Relay Output 1
Audio 2 +
Audio 2 Audio 2 Shield (Gnd) / Input Common 2
Enable Input 2
Relay Common 2
Relay Output 2
Audio 3 +
Audio 3 Audio 3 Shield (Gnd) / Input Common 3
Enable Input 3
Relay Common 3
Relay Output 3
Audio 4 +
Audio 4 Audio 4 Shield (Gnd) / Input Common 4
Enable Input 4
Relay Common 4
Relay Output 4
Audio 5 +
Audio 5 Audio 5 Shield (Gnd) / Input Common 5
Enable Input 5
Relay Common 5
Relay Output 5
Audio 6 +
Audio 6 Audio 6 Shield (Gnd) / Input Common 6
Enable Input 6
Relay Common 6
Relay Output 6
Audio 7 +
Audio 7 Audio 7 Shield (Gnd) / Input Common 7
Enable Input 7
Relay Common 7
Relay Output 7
Audio 8 +
Audio 8 Audio 8 Shield (Gnd) / Input Common 8
Enable Input 8
Relay Common 8
Relay Output 8
Gnd
Gnd
Card Slot: _____________
Wire Color*
Black
Red
BR Shield
White-Blue
Blue-White (Blue)
White-Orange
Black
White
BW Shield
Orange-White (Orange)
White-Green
Green-White (Green)
Black
Green
BG Shield
White-Brown
Brown-White (Brown)
White-Grey
Black
Blue
BBl Shield
Grey-White (Grey)
Red-Blue (Red)
Blue-Red
Black
Red
BR Shield
White-Blue
Blue-White (Blue)
White-Orange
Black
White
BW Shield
Orange-White (Orange)
White-Green
Green-White (Green)
Black
Green
BG Shield
White-Brown
Brown-White (Brown)
White-Grey
Black
Blue
BBl Shield
Grey-White (Grey)
Red-Blue (Red)
Blue-Red
NC
NC
Terminal Block
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Connect
To
*Note: Two variations of the cable are manufactured. One variation is for the both wires of a pair to be striped i.e.
the first pair consists of a white/blue striped wire and a blue/white striped wire. A second variation is for each
cable pair to consist of a solid color wire and a striped wire i.e. the first pair has a solid blue wire and a
blue/white striped wire (the solid color for the pair is shown in brackets).
Document IM-AIB-100/400-2.6
Page 7
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