KCH-1664OPTIONAL ACCESSORIES: KRK-11 (Handheld Control Head Interface Kit)External ViewComponents DescriptionInterface unit (X46-3240-20)Ref. No. Part name DescriptionD5 Diode Reverse protectionControl unit (X53-4350-20)Ref. No. Part name DescriptionQ1~3 Transistor Detection switchD1~5 Varistor Surge absorptionD6 Varistor Current protectorD7 Varistor Surge absorptionD9 Zener diode Surge absorptionTerminal FunctionInterface unit (X46-3240-20)Pin No. Name I/O FunctionCN1 (Remote cable connector)1 ME - MIC GND2 MIC I MIC signal input3 E - GND4 RESET O Reset signal output5 1/2 O Remote head 1 signal output6 TRD I/O Bidirection serial data7 PS I Power switch signal input8 IGN I Ignition sense input9 SB O Switched Battery10 RS1 O Audio Amp output signal (Non-invert)11 RS2 O Audio Amp output signal (Invert)CN4 (to Control unit W700 of theTK-5710/5710H/5810/5810H transceiver)1 ME - MIC GND2 MIC O MIC signal output3 E - GND4 RESET I Reset signal input5 1/2 - Not used6 TRD I/O Bidirection serial data7 PS O Power switch signal output8 IGN O Ignition sense output9 SB I Switched Battery10 RS1 I Audio Amp input signal (Non-invert)11 RS2 I Audio Amp input signal (Invert)Control unit (X53-4350-20)Pin No. Name I/O FunctionCN1 (Remote cable connector)1 ME - MIC GND2 MIC O MIC signal output3 E - GND4 RESET I Reset signal inputVIH: 4.16~5.1V, VIL: –0.3~0.96V5 1/2 I Head 1 or 2 signal input. OPEN6 TRD I/OBidirection serial dataVIH: 4.16~5.10V / VIL: –0.3~0.96VVOH: 4.80~5.20V / VOL: <0.3VBaud rate: 115200bps Max7 PS OPower switch signal outputSW OFF: 13.0V (typ)SW ON: 0V (typ)8 IGN O Ignition sense outputActive High. VOH: 13.4V (typ)9 SB ISwitched BatteryVoltage: 11.39~15.64VCurrent: 750mA max