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NAME
PINOUT
NOTES
EXPANSION
13 Pin DIN Connector on Rear
Panel
Pin
Signal
Note
1
MIC_MIX
Microphone Mixer
2
GND
Signal Ground
3
PTT
Low = True (In/Out)
4
SLAVE_MIXER
Input Low=True
5
UNSEL_MIX
Unselected Radios Mixer
6
SEL_MIX
Selected Radio Mixer
7
EXT_MUTE
Output; External Mute
Logic Level
8
PAD
Spare/Factory Use
9
GND
Signal Ground
10
RX_RS232
Serial Data In
11
TX_RS232
Serial Data Out
12
SLAVE
Input; Low = True
13
GND
Signal Ground
Used for special functions.
Must be enabled by
firmware or special cables.
CAUTION:
Pin functions
vary; Consult factory before
connecting anything to this
connector.
EXT MUTE
RCA Phono Jack on Rear
Panel
Center Pin - Signal
Shell - Ground
This is an open drain output that goes low when PTT is keyed, and, optionally, when
any Busy Light comes on (See Section 11.2.5.3)
Maximum Switching Capacity: 100V, 1.5A
This output can be used to
mute external equipment
such as automobile radios
or can be used to turn on
external equipment such as
"On-the-Air" lights.
SPEAKERS
Mating Connector:
•
AMP/Tyco 172168-1
Plug Housing
•
AMP 770988-1 Socket
Contacts (18-22
AWG)
•
AMP 770986-1 Socket
Contacts (22-28
AWG)
Pin
Signal
Description
1
GND
Signal Ground
2
SP_BR_2
Bridged Speaker
Output (PA)
3
SP_U
Unselected Speaker
4
GND
Signal Ground
5
SP_BR_1
Bridged Speaker
Output (PA)
6
SP_S
Selected Speaker
Selected Audio Speaker:
Pins 6 and GND.
Unselected Audio
Speaker:
Pins 3 and GND.
PA Speaker:
Pins 2 and 5.
All speakers may be
connected at the same time.
NCS-C250C Instruction Manual Rev J
Copyright © 2004-2010 New Communications Solutions, LLC
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