1 PANEL DESCRIPTION1-16Main unit — Rear panel (Continued)ACC socket informationD• ACC socketACC PIN No. NAME DESCRIPTION SPECIFICATIONS12348 7 6 5910111213Rear panel viewColor refers tothe cable strandsof the suppliedcable.q brownw rede oranger yellowt greeny blueu purpleio!0!1!2!3graywhiteblackpinklightbluelightgreen1 8 V Regulated 8 V output. Output voltage:Output current:8 V ± 0.3 VLess than 10 mA2 GND Connects to ground. ———3 HSEND* 1, 2Input/out-put pin.An external equipmentcontrols 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 VMaximum 20 mAThe transceiver outputsa low signal to controlexternal equipment.Output voltage (Low):Current flow:Less than 0.1 VMaximum 200 mA4 BDT Data line for the optional AT-180. ———5 NC(BAND*3 )* 3 If the modification is performed,band voltage output. (FM sec. 19)———Output voltage: 0 to 8 V6 ALC ALC voltage input. Control voltage:Input impedance:–4 V to 0 VMore than 3.3 k˘7 VSEND* 1, 2Input/out-put pin.An external equipmentcontrols 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 VMaximum 20 mAThe transceiver outputsa low signal to controlexternal equipment.Output voltage (Low):Current flow:Less than 0.1 VMaximum 200 mA8 13.8 V 13.8 V output when power is ON. Output current: Less than 1 A9 TKEY Key line for the optional AT-180. ———10 FSKK Controls RTTY keying“High” level:“Low” level:Output current:More than 2.4 VLess than 0.6 VLess than 2 mA11 MOD Modulator input. Input impedance:Input level:10 k˘Approx. 100 mV rms12 AF*3AF detector output.Fixed level, regardless of the [AF]control position.Output impedance:Output level:4.7 k˘100 to 300 mV rms13 SQL S Squelch output.Grounded when squelch opens.SQL open:SQL closed:Less than 0.3 V/5 mAMore than 6.0 V/100 μA*1 When the SEND terminal controls the inductive load (such as a relay), a counter-electromotive force can causethe 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 beforeoperation.eHSEND oruVSENDi13.8 VACC socketRelaySwitching diode To a non-Icomlinear amplifier[Example]*2 VSEND is used for the 144 MHz and 430 MHz bands, and HSEND is used for the HF, 50/70 MHz bands by default.You can change this setting in “VSEND Select” of the “Connectors” Set mode. (p. 6-8)SET > Connectors > VSEND Select*3 You can change this setting in “ACC/USB Output Select” of the “Connectors” Set mode. (p. 6-8)SET > Connectors > ACC/USB Output Select