IC-M29Page 14 / 58 Rev 1.0Fig 4.6 I/O Control Connector▷ Camera firmware upgradeCamera firmware upgrade is available through the ISVI firmware cable.Fig 4.7 ISVI Firmware cable4.6 Trigger Input CircuitFollowing figure shows trigger signal input circuit of 12 pin connector. Trigger signalentered is delivered to internal circuit through photo coupler. Minimum trigger widththat can be recognized at camera is 100us. If trigger signal entered is less than 100us,trigger signal is ignored in camera. External trigger signal can approve signals to thecircuits in the 2 methods shown below.Fig 4.8 Trigger Input SchematicPin I/O Signal Name Pin I/O Signal Name1 INPUT Trigger + 7 OUTPUT Reserved2 INPUT Trigger - 8 INPUT Reserved3 OUTPUT Strobe Output 9 INPUT Reserved4 INPUT Reserved 10 OUTPUT Reserved5 GND GROUND 11 INPUT Reserved6 INPUT Reserved 12 INPUT Reserved