FlexWire v2 Connector Pinout for the FLEX-1500
Content provided by: FlexRadio Systems Engineering
The FlexWire connector on the FLEX-1500 utilizes the version 2 standard (v2) which is slightly different than the v1 standard used on the FLEX-5000 and FLEX-3000 software defined radios. The major difference is that pin 3, which was either grounded, un-used or physically blocked in some FLEX-x000 models, is now utilized as a PTT OUT for keying transverters and amplifiers.
Also, pin 8 has a higher output voltage (13.8 VDC or the value of the external VDC input for the radio) than the Version 1 standard which is 5 VDC.
The FlexWire v2 connector is a standard DB-9 female connector
Pin 1 - Ground
Pin 2 - Transmit Audio Line Input
Pin 3 - PTT Output (Open Drain)
Pin 4 - PTT Input (Also I2C interrupt request input, if used)
Pin 5 - Ground
Pin 6 - I2C Bus, Serial Clock
Pin 7 - I2C Bus, Serial Data
Pin 8 - +13.8 Volts Out (Same as voltage into power connector)
Pin 9 - Receive Audio Line Output
This KB article may reference additional files that are available on the FlexRadio Systems web site Downloads page. Please use the URL(s) below to download the referenced materials.
An Adobe Acrobat Reader may be required to open the file. You can download Adobe Acrobat from here.![]()
KB Source Document(s):
None Referenced
![]()
| System Dependencies | |
| Minimum PowerSDR Version: | N/A |
| Applicable Hardware: | FLEX-1500 |
Content provided by: FlexRadio Systems Engineering
The FlexWire connector on the FLEX-1500 utilizes the version 2 standard (v2) which is slightly different than the v1 standard used on the FLEX-5000 and FLEX-3000 software defined radios. The major difference is that pin 3, which was either grounded, un-used or physically blocked in some FLEX-x000 models, is now utilized as a PTT OUT for keying transverters and amplifiers.
Pin 3 is now connected to an "open-drain" which will provide a closure to ground during transmit for a positive voltage source. If you use this output to directly drive a relay, you must add a diode across the relay to limit the inductive "kick" upon releasing the relay. This protection diode is NOT provided internal to the FLEX-1500 and must be supplied by the operator.
- Maximum current: 0.25 Amps
- Maximum open circuit voltage: +30 Volts (DC)
- Maximum "ON" resistance: 1 Ohm
Also, pin 8 has a higher output voltage (13.8 VDC or the value of the external VDC input for the radio) than the Version 1 standard which is 5 VDC.
The FlexWire v2 connector is a standard DB-9 female connector
Pin 1 - Ground
Pin 2 - Transmit Audio Line Input
Pin 3 - PTT Output (Open Drain)
Pin 4 - PTT Input (Also I2C interrupt request input, if used)
Pin 5 - Ground
Pin 6 - I2C Bus, Serial Clock
Pin 7 - I2C Bus, Serial Data
Pin 8 - +13.8 Volts Out (Same as voltage into power connector)
Pin 9 - Receive Audio Line Output
This KB article may reference additional files that are available on the FlexRadio Systems web site Downloads page. Please use the URL(s) below to download the referenced materials.
An Adobe Acrobat Reader may be required to open the file. You can download Adobe Acrobat from here.
KB Source Document(s):
None Referenced
