Rear Panel Headset Connection; Terminal Block Connections; Ext Mic In Connector; Ext Line In Connector - RTS KP96 SERIES Installation Instructions Manual

2.7.2

Rear Panel Headset Connection

Table 7 lists the HEADSET connector pin functions. A
variety of headset types can be connected. Head-
set/speaker switching can also be accomplished from this
connector. When the front panel HDST switch is in the off
position, shorting pins 7 and 8 on the rear panel headset
connector will cause the headset to activate, and the front
panel speaker and microphone will turn off.

Table 7. Rear Panel Headset Connector Pin-out

Pin
1 Dynamic mic "+" input
2 Dynamic mic common (shield)
3 Carbon mic "+" input
4 Carbon mic common
5 Headphone "+"
6 Dynamic mic "-" input
7 HDST switch control
8 HDST switch common
9 Headphone common
2.7.3

Terminal Block Connections

(Reference Figure 7)
AMP OUT + and - : These terminals provide the key-
panel audio amplifier output signal to drive an 8-ohm, 3-
watt speaker. As supplied from the factory, jumpers con-
nect these terminals to the SPKR IN + and - terminals.
Remove these jumpers only if the keypanel audio output
is to be redirected to an external speaker.
SPKR IN + and - : These terminals connect to the inter-
nal speaker.
GRP CALL (Group Call): As supplied from the factory,
a jumper connects this terminal to the ground terminal for
normal Talk key operation. For external group call, re-
move the jumper, and connect a normally open foot
switch between this terminal and the ground terminal.
When the foot switch is pressed, all Talk keys that are
latched in the up position will be activated. When the foot
switch is released, they will be deactivated.
EXT MUTE: This terminal may be used to drive an ex-
ternal device at no greater than 2 mA sinking current. Its
normal logic state is low (0 Vdc). It shifts to logic high
(+5Vdc) when any Talk key is pressed. This signal may
be used, for example, to mute a monitor speaker when the
keypanel operator is talking on the intercom system.
Function
Installation Instructions, KP96 / KP97 Series Keypanels 13
2.7.4

EXT MIC IN Connector

An external microphone can be connected. The external
microphone may be used with or without a front panel
gooseneck microphone of the same type. (Internal key-
panel jumpers J404-J406 must be set for the type of mi-
crophone (see "Internal Jumpers", page 14).

Table 4. EXT MIC IN Connector Pin-out

Pin
1
2
3
2.7.5

EXT LINE IN Connector

An external balanced audio source, such as program
sound, can be connected. The input is calibrated for a
nominal line level of +8dBu. This level can be changed if
required. See "Line Input to Speaker Level Adjustment",
page 18, for further information.

Table 5. EXT LINE IN Connector Pin-out

Pin Function
1 Shield
2 Line in "+"
3 Line in "-"
2.7.6

MIC PRE OUT Connector

This connector provides a balanced mic output signal of
+8 dBu at 60 ohms. As supplied, the MIC PRE OUT sig-
nal is activated only when any Talk key is on. If you want
this output to be on continuously, you must reset internal
jumper J403 (see "Internal Jumpers", page 14).

Table 6. MIC PRE OUT Connector Pin-out

Pin Function
1 Shield
2 Mic out "+"
3 Mic out "-"
Function
Shield
Mic in "+"
Mic in "-"