icom IC-EX309 Interface Unit Instruction Manual
- June 11, 2024
- ICOM
Table of Contents
icom IC-EX309 Interface Unit
Introduction
Thank you very much for purchasing our products.
The IC-EX309 is an interface unit that is required to connect the optional
communication terminal (CT-10) with other ICOM products such as IC-751, IC-
271A/E/H, IC-471A/E/H, or IC-R71A/E/D.
Please read all the instructions ·so that you can install it into the
transceiver/receiver correctly to get maximum performance and full value from
each set.
CONNECTION OF EACH TERMINAL AND ITS FUNCTION
| Pin No. | Function | Pin No. | Function |
|---|---|---|---|
| 1 | Data bus DO input / output | 13 | Not used |
| 2 | Data bus D1 input/output | 14 | Not used |
| 3 | Data bus D2 input /output | 15 | Not used |
| 4 | Data bus D3 input /output | 16 | Not used |
| 5 | Data bus DA input/output | 17 | Not used |
| 6 | Data bus D5 input/output | 18 | Not used |
| 7 | Data bus D6 input /output | 19 | Not used |
| 8 | Data bus D7 input /output | 20 | Not used |
| 9 | Remote Control (controlling) RP input | 21 | Remote Control (controlling) WP |
input
10| Remote Control (interrupt) SRO input| 22| Remote Control (controlling) DAV
input
11| Squelch SOLS output| 23| Transmission Control SEND input
12| 13.8V DC Output| 24| Ground
-
DO~ D7
Data bus that functions at bi-directional 8 bit parallel. It is set at TTL level. -
RP (Read Pulse)
Controlling data is sent from the transceiver/ receiver to the remote controller when this line is at H level (+5V). It is usually at L level. -
SRO (Service Request)
Line shows that data is being exchanged between the transceiver/receiver and the controller, while the data is being exchanged, this line is L level (0V). Usually, the line is H level (+5V). -
13.8V
Power supply for the controller. Maximum current is 100mA. -
SOLS (Squelch Signal)
Terminal for a signal that automatically stops the frequency scanning. Voltage is +8V when the squelch is closed, and 0V when it is opened. -
WP (Write Pulse)
Controlling data are sent from the remote controller to the transceiver/receiver when this line is at H level (+5V). It is usually at L level (0V). -
DAV (Data Valid)
This line shows data has been received. It is valid at L level (0V). -
SEND
When this line is grounded, the transceiver changes to in transmit mode.
INSTALLATION PROCEDURE
Installation to IC-751
- Remove the top and bottom covers.
- Remove the plate attached to the rear panel and run the cables inward. The connector should be installed with the screws that were used to attach the plate.
- Install the connector onto where specified, and connect the cables from the connector to the unit.
- Plug the cables into J10 and J15 of the LOGIC unit.
- Replace the top and bottom covers.
For installation to IC-R71, refer to the Instruction Manual of the IC-R71 receiver.
Installation to IC-271A/E/H or IC-471A/E/H
- Remove the top and bottom covers.
- Remove the plate attached to the rear panel and pass the cables inward onto the bottom side. The connector is to be attached with the supplied screws.
- Install the unit onto where it is specified and connect the cables from the connector.
- Plug the cables from the unit into J1 and J3 of the LOG IC unit.
- Replace the top and bottom covers.
