1-16
1
PANEL DESCRIPTION
D ACC socket information
• ACC socket
ACC
PIN No.
NAME DESCRIPTION SPECIFICATIONS
1234
8765
9
10 11 12
13
Rear panel view
Color refers to
the cable strands
of the supplied
cable.
q brown
w red
e orange
r yellow
t green
y blue
u purple
i
o
!0
!1
!2
!3
gray
white
black
pink
light
blue
light
green
1
NC
(8 V*)
* If the Band Voltage modification is
performed, regulated 8 V output. (p.
12-2)
—
Output voltage
Output current
: 8 V ± 0.3 V
: Less than 10 mA
2 GND
Connects to ground. —
3
SEND
Input/output
pin.
G r o u n d e d
when trans-
mits.
An external equipment
controls the transceiver.
When this pin goes low,
the transceiver transmits.
Input voltage (High)
Input voltage (Low)
Current flow
: 2.0 V to 20.0 V
: –0.5 V to 0.8 V
: Max. 20 mA
The transceiver outputs
a low signal to control
external equipment.
Output voltage (Low)
Current flow
: Less than 0.1 V
: Max. 200 mA
4 START
Data line for the optional AT-180. —
5
NC
(BAND
*
)
* If the Band Voltage modification is per-
formed, band voltage output.
(p. 12-2)
—
Output voltage : 0 to 8.0 V
6 ALC
ALC voltage input.
Control voltage
Input impedance
: –4 V to 0 V
: More than 3.3 k˘
7 NC
— —
8 13.8 V
13.8 V output when power is ON. Output current : Max. 1 A
9 KEY
Key line for the optional AT-180. —
10 FSKK
Controls RTTY keying
“High” level
“Low” level
Output current
: More than 2.4 V
: Less than 0.6 V
: Less than 2 mA
11 MOD
Modulator input.
Input impedance
Input level
: 10 k˘
: Approx. 100 mV rms
12 AF
AF detector output.
Fixed level, regardless of the [AF] con-
trol position
.
Output impedance
Output level
: 4.7 k˘
: 100–300 mV rms
13 SQLS
Squelch output.
Grounded when squelch opens.
SQL open
SQL closed
: Less than 0.3 V/5 mA
: More than 6.0 V/100 µA
• When connecting the ACC conversion cable (OPC-599)
When the SEND terminal controls the inductive load (such as a relay), a counter-electromotive force can cause the transceiver’s
malfunction or damage. To prevent this, we recommend adding a switching diode, such as an “1SS133,” on the load side of the
circuit to the counter-electromotive force absorption. When the diode is added, a switching delay of the relay may occur. Be sure
to check its switching action before operation.
Rear panel (Continued) ■
eSEND
i13.8V
ACC
socket
Relay
Switching diode
To a non-Icom
linear amplifier
[Example]
ACC 1ACC 2
q FSKK t AF
w GND y SQLS
e SEND u 13.8 V
r MOD i ALC
q NC (8 V*) t ALC
w GND
y NC
e SEND u 13.8 V
r NC (BAND*)
8
1
2
3
4
7
6
5
1
2
3
4
7
6
5
Connect to ACC socket
qwer
tyui
o!0!1!2
!3
* See page 12-2 for details.
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