[Acc] - Icom IC-718 Advanced Manual

4
CONNECTOR INFORMATION

[ACC]

Connects to an external equipment or a PC to control an external unit or the transceiver�
ACC
13
9 10 11 12
5 6 7 8
1 2 3 4
Rear panel view
When using the OPC-599 adapter cable
13
9 10 11 12
5 6 7 8
1 2 3 4
When the SEND terminal controls an inductive load, such
as a relay, a counter-electromotive force can malfunction
or damage the transceiver� To prevent this, we recommend
adding a switching diode, such as an 1SS133, on the load
side of the circuit to absorb the counter-electromotive force�
When the diode is added, a delay in relay switching
may occur� Be sure to check its switching action before
operating�
PIN
NAME
No.
1 8 V Regulated 8 V output�
2 GND Connects to ground�
Input/output pin�
3 SEND Goes to ground when transmitting�
When grounded, transmits�
4 BDT Data line for the optional AT-180�
Band voltage output�
5 BAND
(Varies with amateur band)
6 ALC ALC voltage input�
7 NC
8 13�8 V 13�8 V output when power is ON�
9 TKEY Key line for the AT-180�
10 FSKK RTTY keying input�
11 MOD Modulator input�
AF detector output�
12 AF
Fixed, regardless of [AF] position�
Squelch output�
13 SQL S
Goes to ground when squelch opens�
1 FSKK
2
2 GND
5
4
3 SEND
3
1
8
4 MOD
6 7
ACC 1
1 8 V
2
2 GND
5
4
3 3 SEND
1
6 7 4 BAND
ACC 2
DESCRIPTION
—
5 AF
6 SQL S
7 13�8 V
8 ALC
5 ALC
6 NC
7 13�8 V
(Example) ACC socket
ACC socket
3 SEND
8 13�8 V
4-2
SPECIFICATIONS
Output voltage: 8 V ±0�3 V
Output current: Less than 10 mA
—
Ground level: –0�5 V ~ +0�8 V
Input current: Less than 20 mA
—
Output voltage: 0 ~ 8�0 V
Control voltage: –4 ~ 0 V
Input impedance: More than 10 kΩ
—
Output current: Less than 1 A
—
Ground level: –0�5 ~ 0�8 V
Input current: Less than 10 mA
Input impedance: 10 kΩ
Input level: Approximately 100 mV rms
Output impedance: 4.7 kΩ
Output level: 100 ~ 300 mV rms
SQL open: Less than 0�3 V/5 mA
SQL closed: More than 6.0 V/100 μA
Switching diode
Relay
To a non-Icom
linear amplifier