1.5.2 OPTIONAL CONNECTIONS
1.5.2.1 HEADSET Connector (KP95-0 Keypanel
and KP-96-RC Option Only)
Table 1-4 lists the HEADSET connector pin functions.
1.5.2.2 EXPANSION Connector (KP95-0
Keypanel and KP-96-RC Option Only)
To connect an expansion panel, use the ribbon cable
supplied with the expansion panel. Connect from the
EXPANSION connector on the keypanel to the
CONTROL connector on the expansion panel. If EKPD
series expansion panels are used, the second CONTROL
connector on the expansion panel may be used to connect
to an additional expansion panel. Up to three EKPD series
expansion panels may be connected, providing up to 48
additional
Talk
and
Listen
keys.
1.5.2.3 Terminal Block Connections
(Reference Figure 21-2)
AMP OUT “+” and “-” : These terminals provide the
keypanel audio amplifier output signal to drive an 8-ohm,
3-watt speaker. As supplied from the factory, jumpers
connect 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
internal 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,
remove the jumper, and connect a normally open
footswitch between this terminal and the ground terminal.
When the footswitch is pressed, all
Talk
keys that are
latched in the “up” position will be activated. When the
footswitch is released, they will be deactivated.
EXT MUTE (KP-96-RC Option Only) : This terminal
may be used to drive external devices (such as
open-collector circuits) at no greater than 2 mA sinking
current. Its normal logic state is low (0 Vdc). It shifts to
logic high (+5 Vdc) when a
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.
1234567
+
AMP
OUT
+
SPKR
IN
–
AMP
OUT
–
SPKR
IN
GROUP
CALL
EXT.
MUTE
JUMPER
JUMPER
TS1
TERMINAL
BLOCK
EXTERNAL
SPEAKER
INTERNAL
SPEAKER
DRIVER
EXTERNAL DRIVER
DEVICE CIRCUIT
FOOT
SWITCH
Figure 1-2. Optional Terminal Block Connections
Pin Function
1 Dynamic mic “+” input
2 Dynamic mic common (shield)
3 Carbon mic “+” input
4 Carbon mic common (shield)
5 Headphone “+”
6 Dynamic mic “-” input
7 HDST switch control
8 HDST switch common
9 Headphone common
Table 1-4
HEADSET Connector Pin-out
KP95/96/97 Keypanel Installation
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