RTS KP95 Servisní příručka stáhnout pdf (Strana 11)

2.9.3 Terminal Block Connections

(Reference Figure 6)

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.

2.9.4 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-

Installation Instructions, KP95-0 Keypanel 11

Pin Function

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

Table 4. Rear Panel Headset Connector Pin-out

EXPANSION

KP95-0 EKPD-95

EKPD-95

OUT

Figure 5. Optional interconnections.

1234567

AMP

OUT

SPKR

–

AMP

OUT

–

SPKR

GROUP

CALL

EXT.

MUTE

JUMPER

TS1

TERMINAL

BLOCK

EXTERNAL

SPEAKER

INTERNAL

SPEAKER

DRIVER

EXTERNAL DRIVER

DEVICE CIRCUIT

FOOT

SWITCH

Figure 6. Terminal block wiring diagram

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 19 20

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