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DI-913MB and DI-914MB

Multi-Channel Analog Input Modules
DC Current, DC Voltage or AC Current Input
Limit Alarms or Discrete Outputs

• 16-bit sigma-delta A/D yields 0.1% of range resolution and accuracy
• Four inputs in a single inch-wide module reduces system costs and saves panel space
• Four discrete outputs enable local limit alarms or 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
• Four-way isolation eliminates potential ground loops between power, input, output, and network circuitry
• Self-diagnostics monitor microcontroller activity to detect operational failures (lock-up) and execute a reset to restore communication
• Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)

Specifications

913MB - DC Current Input Module with Limit Alarms
Input: 4 channels, ±10V DC input range
Alarms: 4 channels, open drain MOSFETS (1A DC loads, 0 to 35V DC)
Power: 10 to 36V DC, 24V AC
Network Communication: Modbus RTU high-speed RS-485

914MB - DC Voltage Input Module with Limit Alarms
Input: 4 channels, 0 to 20mA DC input range (0 to 20A AC with AC sensor option)
Alarms: 4 channels, open drain MOSFETS (1A DC loads, 0 to 35V DC)
Power: 10 to 36V DC, 24V AC
Network Communication: Modbus RTU high-speed RS-485

For more complete specifications, download the Data Sheet (pdf) or the Manual (pdf).

Product Highlights

This signal conditioner is a four-channel analog input module with four discrete outputs. It provides isolation between input, 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 inputs accommodate wide DC voltage or current ranges. Flexible discrete outputs operate as alarms or on/off controllers. As limit alarms, each discrete output can be configured with high and/or low setpoints exclusively tied to an analog input channel. Alarm trips function without host communication enabling low-cost stand-alone alarms, as well as local backup for the primary control system. Otherwise, on/off control is based on commands issued by the host system.? See the Circuit Connection Diagrams.

Combining flexible transmitter functions, mixed signal I/O, alarm support, 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 makes these modules reliable for use in both control room and distributed field I/O 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.

© 2008 DATAQ Instruments, Inc. All rights reserved. Date last edited 7/26/2006. Contact the Webmaster

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