Pinout of the 25 pin Accessory Connector (J3):
| Pin No. | Pin Name | Description |
| 1 | SPKR- | Differential output to the external 8ohm, 8W spkr |
| 2 | SPARE | |
| 3 | SPKR+ | Differential output to the external 8ohm, 8W speaker |
| 4 | RX AUDIO+ | Differential output of received audio signals (0dBm; 600ohm; not controlled by volume) |
| 5 | RX AUDIO- | Differential output of received audio signals (0dBm; 600ohm; not controlled by volume) |
| 6 | TX AUDIO+ | Differential input received audio signals (600ohm impedance; -9 to 0dBm is required for full power) |
| 7 | TX AUDIO- | Differential input audio signals (600ohm impedance; -9 to 0 dBm is required for full power) |
| 8 | PTT_IN VOICE | Transmission command (by short to ground) for voice signals |
| 9 | PTT_IN DATA | Transmission command (by short to ground) for data signals |
| 10 | PTT_IN CW | Transmission command (by short to ground) for CW (Morse) signals |
| 11 | SW A+ | 13.8V (nominal) current limited |
| 12 | KW_C_C | KW option channel change |
| 13 | KW_ON/OFF | KW option power ON/OFF |
| 14 | AGC FAST/SLOW | AGC fast or slow release |
| 15 | RXD | Point to point communication line to HOST/HLC |
| 16 | TXD | Point to point communication line to HOST/HLC |
| 17 | RESET | External RESET |
| 18 | GND | Ground |
| 19 | KW PTT | KW PTT |
| 20 | EXT_ALARM | External Alarm Operation (open collector - pulled to ground when external alarm is activated) |
| 21 | VPP | Flash programming voltage |
| 22 | KW_ALC | KW_ALC |
| 23 | SQ_GATE | Squelch indication |
| 24 | FAN ON/OFF | FAN ON/OFF |
| 25 | KW TUNE | KW tune |
Pinout of the Programming Cable
RJ-45 Plug / DB-9 Jack
Pin 2- Receive Data ----- Pin 3- Transmit Data Pin 3- Transmit Data ----- Pin 2- Receive Data Pin 4- Ground ----- Pin 5- Ground
The numbering of the RJ-45 runs consecutively from left to right. With the Plug facing you, Pin 1 is the first pin on the left and Pin 8 is the last on the right.
No RIB is required, it is straight RS-232 into the radio.