Technical Specifications:
Series: GE Fanuc 90-70 Genius I/O
Number of Ports: 2 independent serial ports (COM1 + COM2)
Communication Standards: RS-232C / RS-485 (Selectable via jumper or software)
Baud Rate: 300 to 115,200 bps (Software configurable)
Data Bits: 7 or 8 bits
Stop Bits: 1 or 2 bits
Parity: None, Even, or Odd
Supported Protocols: Modbus RTU (Master/Slave), GE SRTP, ASCII, DF1
Backplane Bus: VMEbus
Operating Temperature: 0°C to +60°C
Isolation Voltage: Port-to-backplane > 500V DC
MTBF: > 100,000 hours
ESD Protection: ±15kV air discharge
Functional Features:
Dual Independent Ports: COM1 and COM2 operate simultaneously with different devices without mutual interference.
Master/Slave Switching: Each port can be independently configured as Modbus master or slave.
Full Modbus RTU Support: Built-in Modbus RTU protocol stack handles frame parsing without CPU involvement.
256-Byte FIFO Buffer: Each port has a 256-byte transmit/receive buffer to prevent data loss during burst traffic.
Timeout Detection: Automatic detection of communication timeout and frame errors.
Hot Swap Capable: Supports live insertion and removal when configured in the CPU program.
Performance Parameters:
Maximum Distance (RS-485): 1,200 meters at 9,600 bps
Isolation Voltage: > 500V DC
MTBF: > 100,000 hours
Material Composition:
Enclosure: Die-cast aluminum with EMI shielding
PCB: 4-layer FR-4 board
UART Chip: MAX3107 or equivalent UART with FIFO
Isolation: Digital isolators + isolated DC-DC converter
Connectors: DB9 male connector (RS-232) / Screw terminals (RS-485)
Structural Features:
Dimensions: Standard GE 90-70 Eurocard, approximately 40mm width
Front Panel: TX/RX LED indicators for both COM1 and COM2
Terminals: Bottom-mounted DB9 socket (COM1) and screw terminals (COM2)
Jumpers: On-board jumpers for RS-232/RS-485 mode and termination resistor selection
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