E1 brain boards are Ethernet-ready I/O and communication processors for digital and analog I/O systems. The E1 connects to a rack of Opto 22 G1, G4, or Quad Pak digital I/O modules, while the E2 connects to a rack of Opto 22 G1 analog I/O modules. Each brain board communicates with a host computer and performs control functions for each I/O point. Designed as drop-in replacements for Opto 22's serial-based B1 brain boards, E1 brain boards connect to standard 10/100 Mbps Ethernet networks while including support for serial Optomux-based networks. Power Requirements: 5.0-5.2 VDC at 0.5 amps (excludes digital and analog module power requirements). Operating temperature: 0 degree C to 70 degree C. Storage temperature: -40 degree C to 85 degree C. Humidity: 0-95 percent humidity, non-condensing. Ethernet network interface: terminal block; E2: Terminal block (on mounting rack), Data rates: 300, 600, 1200, 2400, 4800, 9600, 19200, and 38400 baud, Supported protocols: Optomux, Network Range: Up to 32 Optomux stations configured for multidrop can be used on a serial network of up to 1524 m (5000 ft.) total length. Up to 256 Optomux stations and longer line lengths can be used by installing network repeaters. Up to 256 Optomux stations configured for repeat mode can exist on a network. Analog I/o (E2): read point, write point, input averaging, min/max recording (peak and valley), high/low range testing, offset and gain calculation, waveform generation, watchdog timer. Modbus/TCP, OptoMMP, and OPC I/O Functions: With these protocols, the following brain-based features are not available: No input averaging or waveform generation (E2). LED Indicators: Status, Link, Activity, Full duplex, Transmit (serial), Receive (serial). Jumper-selectable Serial Options: Group A: Multidrop or repeat mode, RS-485 termination and biasing, Group B: Serial address (0 to 255), baud rate, 2- or 4-pass protocol.