Harris Legacy 99-1300-0, Operation & Technical Manual

Page: 36 / 98

Revision B • 1/03
H A R R I S C O R P O R A T I O N
2-24
2 Installation
TELCO MODULE — LOGIC I/O
There is one 24-pin logic connector on the Telco
module to control the connected device.
To activate the remote inputs (On, Off, Cough,
Talk to Caller) jumper pin 18 (Activate Logic In-
puts) to +VDC on the remote device, or to pin 6
(Logic 5VDC) when a remote panel is used.
The Talk to Caller (-) logic input allows the board
operator to talk to the caller. When this input is
pulled low, the console-mounted talkback mic is sent
to the left channel of the Mix-Minus output for this
caller on the Output 1 module. The right channel
mix-minus output is not affected by talkback.
Logic Connectors
Logic 5VDC
Logic 5VDC
Logic 5VDC
Cough (-)
Off (-)
On (-)
Logic 5VDC
Start Command Pulse
Stop Command Pulse
Logic Ground
Logic Ground
Logic Ground
Ready (+)
Start Command Sustained
Reset (+)
Ready (-)
Talk to Caller (-)
Reset (-)
Activate Logic Inputs (+)
On Tally
Off Tally
Talk Tally
Tally Common
Command Common
12
11
10
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
(wire insertion end view)
Telco Module, Logic I/O — Simplified Logic Diagram
Notes:
Opto-Isolator inputs can 5 to +40 VDC logic
Opto-Isolator outputs can handle up to 60 volts or 350 mA
18
19
21
20
9
7
8
24
22
13
15
23
4 Stop Command Pulse
Start Command Sustained
Command Common
Talk Tally
Logic Ground
Logic Ground
Logic Ground
Tally Common
On Tally 17
16
14
1
2
3
12
11
10
6
Int
ernal L
o
gic
5 Start Command Pulse
Off Tally
Logic 5VDC
Logic 5VDC
Logic 5VDC
Logic 5VDC
On Input (-)
Off Input (-)
Cough Input (-)
Talk To Caller Input (-)
Ready Input (-)
Reset Input (-)
Activate Logic )
Reset Input (+)
Ready Input (+)
+5V
Reg.