Up one level (Scom index)
Back to Home 		  Connector Pinouts of various Scom Controllers
By Mike Morris WA6ILQ 		  Print this Page

Skip down for the model 7330 series pinouts

Scom 5K, 6K and 7K Controller Connectors
Pin 5K Connector 6K Connector 7K J2 Connector
(DB-25 Female)		 7K J3 Connector
(DB-25 Male)
1 Logic In 1 Logic In 1 Receiver #1 Audio In Logic In #1
2 Logic In 2 Logic In 2 Receiver #1 COR In Logic In #2
3 Logic In 3 Logic In 3 Receiver #2 COR In Logic In #3
4 Receiver #1 CTCSS In Receiver #1 CTCSS In Receiver #3 COR In Logic In #4
5 Receiver #2 COR In Receiver #2 COR In Receiver #1 CTCSS In Logic In #5
6 Receiver #1 COR In Receiver #1 COR In Receiver #2 CTCSS In Logic In #6
7 Logic Out 1 Logic Out 1 Receiver #3 CTCSS In Phone Line Busy In *
8 Logic Out 2 Logic Out 2 Receiver #2 Audio In Logic Out #1
9 Logic Out 3 Logic Out 3 CTCSS Freq #1 Out Logic Out #2
10 TX PTT Out TX PTT Out TX #1 PTT Out Logic Out #3
11 TX Audio TX Audio TX #2 PTT Out Logic Out #4
12 receiver #2 Audio receiver #2 Audio CTCSS Freq #2 Out Logic Out #5
13 Receiver #1 Audio Receiver #1 Audio CTCSS Freq #3 Out Logic Out #6
14 Ground Ground Transmitter #1 Audio Out Logic Out #7
15 Ground Ground Transmitter #2 Audio Out Phone Line Busy Out *
16 Ground Receiver #2 CTCSS In CTCSS Freq #4 Out FC1 Out
17 Ground Ground CTCSS Freq #5 Out FC2 Out
18 Ground DC Power In CTCSS Freq #6 Out FC3 Out
19 Ground Ground Ground +5V Test
20 Ground Ground Ground +10V Test
21 Ground Ground Ground +12V Test
22 Ground Ground Ground Ground
23 Ground Ground CTCSS Encoder In Ground
24 Ground Ground CTCSS Encoder Out Ground
25 Ground Ground Receiver #3 Audio In Ground

* Note: When using any revision of the Version 2.04 firmware in a 7K the function of pin 7 can be reassigned to Logic In #7, and pin 15 can be reassigned to Logic Out #8.

The 7330 has a separate DE-9 connector for each radio port, and a DB-25 for signals common to the entire controller. The two serial ports are wired differently: Serial Port #1 is wired as DTE; #2 is wired as DCE. For more details, Google "DCE and DTE". You can run a plain 3-wire extension cord from your computer's DE-9 serial port and serial port #2, all you need is pins 2, 3 and 5.

Numbers in square brackets [ ] reference table notes at the end of the table.

Scom 7330 Controller Connectors
Pin I/O Connector
DB-25 Female		 Radio Connector
(one DE-9 Female per radio port)		 Serial Connector #1
DE-9 Male		 Serial Connector #2
DE-9 Female [1]
1 Logic Output #1 Receiver Audio Input Carrier Detect (DCD)[2] Carrier Detect (DCD) - No connection
2 Logic Output #2 Receiver COR Logic Level Input Receive Data (RXD) Receive Data (RXD)
3 Logic Output #3 Receiver CTCSS or DCS decoder Logic Level In Transmit Data (TXD) Transmit Data (TXD)
4 Logic Output #4 Transmitter PTT Out Data Terminal Ready (DTR)
Not implemented as a signal, jumpered to pin 6 inside the unit		 Data Terminal Ready (DTR)
Not implemented as a signal, jumpered to pin 6 inside the unit
5 Logic Output #5 Transmitter Audio Out Data Ground Data Ground
6 Logic Output #6 Ground for Receiver Audio Data Set Ready (DSR)
Not implemented as a signal, jumpered to pin 4 inside the unit		 Data Set Ready (DSR)
Not implemented as a signal, jumpered to pin 4 inside the unit
7 Analog In #3 Ground CTCSS Audio (see pin 8) Request To Send (RTS) [2] Request To Send (RTS)
Not implemented as a signal, jumpered to pin 8 inside the unit
8 Analog In #2 Transmitter CTCSS Audio Encoder or a Logic Level Out   (jumperable, see note 2) Clear To Send (CTS) [2] Clear To Send (CTS)
Not implemented as a signal, jumpered to pin 7 inside the unit
9 Analog In #1 Ground for Transmitter Audio Ring Indicate (RI) - No Connection Ring Indicate (RI) - No Connection
10 Logic Input #1 Not Applicable Not Applicable Not Applicable
11 Logic Input #2
12 Logic Input #3
13 Logic Input #4
14 Logic Output #7
15 Logic Output #8
16 Ground
17 Ground
18 Ground
19 Ground
20 Ground
21 Ground
22 Ground
23 Ground
24 Ground
25 Ground
Table notes:
1) When Serial connection #2 is configured as the Console, you can connect it to a 9-pin serial port on a PC using a 9-pin serial straight-through cable (a DE-9 extension cord).
2) Pin 8 of each radio port can be either a CTCSS encoder or a logic level to control the factory encoder in the transmitter. The selection is controlled by a jumper on each port - J37 (port 1), J38 (port 2) and J39 (port 3). The factory default is that the CTCSS encoder audio is connected.

Contact Information:

The author can be contacted at: his-callsign // at // repeater-builder // dot // com.



Top of the page
Up one level (Scom index)
Back to Home

Table data above is from the Scom manuals.
Artistic layout, text and hand-coded HTML © Copyright 2005 and date of last update by Mike Morris WA6ILQ
This page originally posted on Monday 03-Feb-2005

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.