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Interface 3, 20 RXAUX RX RS232 Aux. Interface 4 RTX485 - RTX- RS485 Main Interface 5 RTX485 + RTX+ RS485 Main Interface 7 SGND Signal Ground 8 OUT1 + Output 1 + 11 OUT2 + Output 2 + 18 EXT TRIG + External trigger + 19 EXT TRIG - External trigger - 10, 12, 22 I/O REF Input/Output reference 17 IN1 - Input 1 - 6, 14, 15, 16, 23, 24 N.C. Not Connected * Pins 1 and 25 are connected together internally. 851000292 (Rev. B) Power Supply Power can be supplied to the scanner through the pin