Technical Specifications Appendix AOEM4 Family Installation and Operation User Manual Rev 12 119Figure 43: Top-view of 40-Pin Connector on the OEM4-G2Signal Descriptions PinVIN Voltage In, +4.5 to +18 VDC 1PV Output indicates 'good solution' or valid GPS position when high. 2USB D+ USB interface data (+) (Requires firmware version 2.100 or higher) 3GND Digital Ground 4USB D- USB interface data (-) (Requires firmware version 2.100 or higher) 5GND Digital Ground 6PPS Output pulse 1 ms wide for which the trailing edge acts as the reference. Polarityand period can be configured using the PPSCONTROL command described inVolume 2.7GND Digital Ground 8VARF Variable frequency out 9GND Digital Ground 10Event1 Mark 1 input, which requires a pulse longer than 65 ns. Polarity can beconfigured using the MARKCONTROL command detailed in Volume 2. 11GND Digital Ground 12STATUS_RED Indicates the OEM4-G2 card is not working properly when high or pulsing. 13CTS1/RXD1(-) COM1 input Clear to Send for RS-232 / Received Data (-) for RS-422 14TXD1/TXD1(+) COM1 output Transmitted Data for RS-232 / Transmitted Data (+) for RS-422 15RTS1/TXD1(-) COM1 output Request to Send for RS-232 / Transmitted Data (-) for RS-422 16RXD1/RXD1(+) COM1 input Received Data for RS-232 / Received Data (+) for RS-422 17CTS3 Clear to Send for COM 3 input 18TXD3 Transmitted Data for COM 3 output 19DCD2 Data Carrier Detected for COM 2 input 20RXD3 Received Data for COM 3 input 21RTS3 Request to Send for COM 3 output 22DTR2 Data Terminal Ready for COM 2 output 23CTS2 Clear to Send for COM 2 input 24TXD2 Transmitted Data for COM 2 output 25RTS2 Request to Send for COM 2 output 26RXD2 Received Data for COM 2 input 27STATUS_GREEN Indicates the OEM4-G2 card is working properly when pulsing at 1 Hz. 28GPIO_USER0 Reserved. 10 kΩ pull-down resistor. 29GPIO_USER1 COM1 port configuration selector. 10 kΩ pull-down resistor. (At startup, tie highto set COM1 to RS-422 or leave open for RS-232. See Section 3.2.5.1 on Page36 for more details.)30
