TB9400 Installation and Operation Manual
Installation
85
© Tait International Limited November 2019
4.6.9
Connecting General Purpose Inputs and Outputs
General purpose inputs and outputs are connected via the DB-25 connector
on the rear panel of the base station.
The pin allocations for the DB-25 connector are given in the following
table: Note that not all pins are used in this release of the base station.
Analog line operation requires reciter hardware version 1.1 or later.
Reciters with hardware version 1.0 can be upgraded to version 1.1 at a
Tait service centre. Contact your Tait dealer for details.
The existing Tx key and Rx gate signals are sufficient for balanced
audio interconnection with connecting equipment compatible with 5V
TTL level signaling. Tait also offers an isolation adapter that provides
E&M isolated signaling (order number TBC101A).
Pin
Signal Name
Signal Type
Notes
1
balanced out +
output
2
balanced out -
3
reserved for future use
4
5
6
balanced in +
input
7
balanced in -
8
9
Rx gate
output
10
Tx key
input
11
digital in 1
input
5V TTL logic
active state configurable
(active high vs. active
low)
12
digital in 2
13
+5.2VDC output
power output
maximum current 200mA
14
digital in 3
input
5V TTL logic
active state configurable
(active high vs. active
low)
15
digital in 4
16
digital in 5
17
digital in 6
18
digital in 7
19
digital in 8
20
digital in 9
21
digital in 10 / Rx disable
22
digital in 11
23
digital in 12
24
simplex
antenna (coax) relay
output
a
25
ground
ground
a. Open drain output to drive coax relay for simplex operation.
external view
B
C
D
E
F
G
H
I
J
1)
1!
1@
1#
1$
1%
1^
1&
1*
1(
2)
2!
2@
2#
2$
2%
