BusWorks® 900EN Series I/O Modules interface analog and discrete I/O signals directly to an Ethernet Modbus/TCP 10/100 network. Twelve-channel, inch-wide I/O modules operate independently of any buscoupler or I/O rack, without any special system power supply. Self-contained I/O modules are more cost- and space-efficient for applications requiring fewer I/O channels by offering lower startup costs and higher density mounting. Setup is also faster and easier, with embedded web pages allowing configuration using any standard web browser. No other software is required. Flexible power requirements support operation on standard 15-36 V dc power supplies. The 12-channel discrete I/O modules are ideal for on/off monitoring and control of industrial devices. Analog I/O modules interface dc voltage or current input signals to network controller.
I/O modules provide isolated Modbus/TCP 10Base-T/100Base-TX network interface. Each module supports up to 10 sockets, allowing communication with multiple masters. Automatic negotiation arbitrates 10/100 Mbps and full/half-duplex communication. Built-in watchdog timers monitor communication problems while self-diagnostic capabilities simplify maintenance and troubleshooting. Failsafe mode ensures outputs are sent to safe state if failure occurs.
Two analog I/O models accept 0-20mA (963EN) or ±10V dc (964EN) signals in variety of ranges for greater flexibility in single unit. All 12 channels are isolated as a group from network and power; 16-bit sigma-delta A/D converters deliver high accuracy for precise measurements.
Three discrete I/O models are available -- 12 input channels (981EN), 12 output channels (982EN), and 12 bidirectional input/output channels (983EN). Individually selectable bidirectional channels let user mix inputs and outputs on one unit to use fewer modules and reduce costs. Input modules transmit discrete level data to other network devices or controllers. Input channels are active-low with a 0-35 V dc range and TTL-compatible. Output modules can activate alarms or provide on/off switching. Output channels are open-drain DMOS mosfet switches with 0-35 V dc range for current sinking applications. On 983EN models, input buffers are connected in tandem with open-drain outputs for convenient loop-back verification of output state.
Other features to ensure dependable operation include internal microcontroller, with integrated non-volatile memory for reliable storage of configuration parameters, which can be reprogrammed repeatedly. For visual confirmation of proper operation, LEDs indicate power, network activity, and individual channel status. CE approvals and UL/cUL Class I Div. 2 listing are pending.
