Garmin 16X LVS Technical Specifications - Page 11

2 GPS 16x WIRING AND PINOUTS 2.1 GPS 16x PINOUT The GPS 16xLVS and GPS 16xHVS sensors utilize an 8-pin RJ-45 plug. The following is a functional description of each wire in the cable assembly. RJ-45 Pin # 1 2 3 4 5 6 7 8 Wire Color Red Black Yellow Blue White Gray Green Violet Signal Name POWER GROUND REMOTE POWER ON/OFF PORT 1 DATA IN PORT 1 DATA OUT PPS PORT 2 DATA IN PORT 2 DATA OUT Description GPS 16xLVS: Regulated +3.3 to +6 Vdc. Typical operating current is 80 mA. An internal 6.67 Vdc transient zener diode and a positive temperature coefficient resistor protect from transients and over-voltages. With voltages greater than 6.8 Vdc the zener will draw several amps of current through the resistor, causing it to heat rapidly and eventually power the unit off, unless an external fuse blows first. When proper supply voltages are returned, the resistor will cool and allow the GPS 16xLVS to operate. GPS 16xHVS: Vin can be an unregulated 8.0 Vdc to 40 Vdc, optimized for 12 Vdc. Typical operating power is 780 mW. This voltage drives a switching regulator with a nominal 5.0 Vdc output, which powers an internal linear regulator, producing the system Vcc. Power and Signal Ground External Power Control Input. Active (ON) if less than 0.3 Vdc. Inactive (OFF) if open-circuit. Pulling this pin to ground enables the unit; leaving the pin opencircuited powers the internal regulators off and drops the supply current to less than 1 mA. This input is intended to be driven by an open-collector output. First Serial Asynchronous Input. RS-232 compatible with maximum input voltage range -25 < Vdc < 25. This input may also be directly connected to standard 3 to 5 Vdc CMOS logic. The low signal voltage requirement is 2.4 Vdc. Input impedance is between 3.0 and 7.0 kΩ. This input may be used to receive serial initialization/ configuration data as specified in section 4.1 Received NMES 0183 Sentences. First Serial Asynchronous Output. This RS-232 compatible output normally provides serial data which is formatted per NMEA 0183, Version 3.0. The NMEA 0183 baud rate is switchable in the range of 4800 to 38400 baud. The default baud rate is 4800. One-Pulse-Per-Second Output. Typical voltage rise and fall times are 300 ns. Impedance is 150 Ω. Open circuit output voltage is low = 0 Vdc and high = Vin in the GPS 16xLVS, and low = 0 Vdc and high = 5.0 Vdc in the GPS 16xHVS and GPS 17HVS. The default format is a 100 ms wide active-high pulse at a 1 Hz rate; the pulse width is configurable in 20 ms increments. Rising edge is synchronized to the start of each GPS second. This output provides between 800 mVp-p to 1.7 Vp-p for GPS 16xLVS and 1.4 Vp-p for the GPS 16xHVS and 17HVS into a 50 Ω load. The pulse time measured at the 50% voltage point will be about 50 ns earlier with a 50 Ω load than with no load. Second Serial Asynchronous Input, electrically identical to PORT 1 DATA IN. This input may be used to receive serial differential GPS data formatted per RTCM SC-104 Recommended Standards For Differential Navstar GPS Service, Version 2.2 (see section 4.5 Received RTCM Data for details). Second Serial Asynchronous Output, electrically identical to PORT 1 DATA OUT. Reserved for future use. Table 1: GPS 16x Wire Pinout 190-00228-08 GPS 16x Technical Specifications Page 7 Rev. B