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DI-917MB and DI-918MB

Multi-Channel Analog Output Modules
DC Current or DC Voltage Outputs
Discrete Outputs

Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps) 12-bit D/A yields 0.1% of span resolution and accuracy Four outputs in a single inch-wide module reduces system costs and saves panel space Four discrete outputs enable host-controlled on/off switching Heavy-duty 1A solid-state relays provide dependable on/off control of industrial devices Self-calibration lowers maintenance costs by reducing periodic manual calibration checks Watchdog timers provide a configurable failsafe output state for use when host I/O communication is lost Three-way isolation eliminates potential ground loops between power, output and network circuitry Self-diagnostics monitor microcontroller activity to detect operational failures (lock-up) and execute a reset to restore communication.

Note: Pricing outside the U.S. will be higher to account for shipping, taxes, duty, currency fluctuation, local warranty and technical support in your country. DI-900MB modules have typical lead times of 1-2 weeks.

Part Number	Description	Price (US)	DATAQ Store
DI-917MB	4-channel DC current output module.	$365	Quantity:
DI-918MB	4-channel DC voltage output module.	$365	Quantity:

Product Highlights

These modules drive four analog output channels and also feature four discrete outputs for on/off control. Isolation separates the output, power, and network circuits. Network communication adheres to the industry-standard RS-485 Modbus RTU protocol. AC and DC power sources are supported with nonpolarized, diode-coupled terminals.

The analog outputs generate a signal based on communication from the host. They accommodate wide DC voltage or current ranges. Discrete outputs provide simple on/off switching capability for external devices. See the Circuit Connection Diagrams.

Combining analog outputs, on/off controllers, and a network interface in a single package, makes this instrument extremely powerful. Multi-channel design adds cost-efficiency and allows high-density mounting. Plus, safe, rugged construction make it reliable for both control room and distributed field I/O use in a broad range of temperature control applications. Custom module configurations are also possible (consult factory for details).

Everything you need to complete your network is available from DATAQ Instruments, Inc. - isolators, signal converters, signal boosters, power sources, and mounting hardware. Check out the Accessories.