Technical Specifications:
Series: GE Fanuc 90-30 / 90-70 / RX7i
Ports: 1 Serial Port (RS-232 or RS-485 configurable)
Communication Protocol: GE Serial Port Link (SPL)
Baud Rate: 19200 to 115200 bps (Software configurable)
Maximum Link Distance: 15 meters (RS-232), 1200 meters (RS-485 with repeaters)
Data Buffer: 256 bytes TX / 256 bytes RX
Backplane Interface: VMEbus (90-70) or Local Bus (90-30/RX7i)
Operating Temperature: 0°C to +60°C
Functional Features:
High-Speed Peer-to-Peer: Enables direct PLC-to-PLC communication without a master/slave architecture, reducing latency.
SPL Protocol: GE’s proprietary protocol provides error checking, data framing, and automatic retry, more reliable than raw Modbus.
Dual Configuration: Each port can be independently configured as RS-232 (point-to-point) or RS-485 (multi-drop).
Buffer Management: Hardware FIFO buffers prevent data loss during high-speed transfers.
Transparent Mode: Supports transparent data passthrough for connecting legacy devices that do not speak SPL.
Performance Parameters:
Throughput: > 100 Kbps effective data rate
Latency: < 5ms (point-to-point)
Error Rate: < 10^-9 (with SPL protocol)
MTBF: > 100,000 hours
Isolation: > 500V DC (RS-485 mode)
Material Composition:
Housing: Aluminum extrusion with anodized finish
PCB: 4-layer FR-4
Serial Chip: 16C550 UART with 16-byte FIFO
Isolation: Digital opto-isolators for RS-485 mode
Connectors: DB9 Male (RS-232) or Screw terminals (RS-485)
Structural Features:
Form Factor: GE 90-30/70 I/O module, approximately 40mm wide
Mounting: Any I/O slot in the PLC chassis
Front Panel: TX (Green), RX (Green), ERR (Red) LEDs
Rear Panel: DB9 connector or screw terminals, backplane connector
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