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56 SPAN-IGM User Manual Rev 2
Appendix A Technical Specifications
A.3 SPAN-IGM Ports
Table 20: Main Port Pinout
Table 21: AUX Port Pinout
Pin # Label Description
1 MIC_TX/MIC_TX+ MODE2 high or open: MIC port transmit (RS-232)
MODE2 low: MIC port transmit positive (RS-422)
2 CAN+/MIC_TX- MODE2 high or open: CAN bus positive
MODE2 low: MIC port transmit negative (RS-422)
3 DGND Digital ground
4 V+ SPAN-IGM power supply input, positive
5 V- SPAN-IGM power supply input, negative
6 MIC_RX/MIC_RX+ MODE2 high or open: MIC port receiver (RS-232)
MODE2 low: MIC port receive positive (RS-422)
7 CAN-/MIC_RX- MODE2 high or open: CAN bus negative
MODE2 low: MIC port receive negative (RS-422)
8 DGND Digital ground
9User_TX/
User_TX+
MODE1 high or open: User port (COM2) transmit (RS-232)
MODE1 low: User port (COM2) transmit positive (RS-422)
10 User_RX/
User_RX+
MODE1 high or open: User port (COM2) receive (RS-232)
MODE1 low: User port (COM2) receive positive (RS-422)
11 DGND Digital ground
12 MODE1 Mode 1 input, controls User port standard
13 MODE2 Mode 2 input, controls MIC port standard and CAN bus
14 User_TX- MODE1 high or open: No connection
MODE1 low: User port (COM2) transmit negative (RS-422)
15 User_RX- MODE1 high or open: No connection
MODE1 low: User port (COM2) receive negative (RS-422)
Pin # Label Description
1 ODM_A+ Odometer input A positive
2 ODM_B+ Odometer input B positive (no connection on SPAN-IGM-S1)
3 D+ USB Data, input
4 WS_VOUT Wheel sensor output voltage (15 VDC)
5 DGND Digital ground
6 ODM_A- Odometer input A negative
7 ODM_B- Odometer input B negative (no connection on SPAN-IGM-S1)
8 D- USB data, negative
9 DGND Digital ground
10 VARF Variable Frequency output
11 EVENT2 Event 2/Mark 2 input
12 EVENT1 Event 1/Mark 1 input
13 COM3_TX COM3 port transmit (RS-232)
14 COM3_RX COM3 port receive (RS-232)
15 PPS Pulse Per Second