DI-900MB Modules - OBSOLETE

Din rail mountable analog and discrete I/O modules that support the Modbus-RTU protocol for distributed I/O applications

DI-900 Modbus Distributed Data AcquisitionThe DI-900MB Series I/O System is a collection of analog and discrete I/O modules with Modbus-RTU protocol network communication. These modules are ideal for a wide variety of distributed I/O applications including data acquisition & control, process monitoring, and test & measurement. Windows-based configuration software simplifies module setup with easy selection of input/output ranges, alarm setpoints, and other operating parameters.

All DI-900MB I/O modules communicate over a high-speed RS-485 network supporting data transfer rates up to 115K baud. Analog input modules accept variable DC voltage, current, and thermocouple sensor signals and feature local limit alarm capabilities. Analog output modules provide DC voltage or current field control signals for local displays, recorders, variable frequency drives, valves, and other control equipment. Discrete I/O modules monitor and/or control the on/off status of industrial devices. All modules may be mixed/matched and coexist on the same Modbus network in a manner that precisely addresses the requirements of any given application.

See the Circuit Connection Diagrams.

DI-900MB Modules by Function

Click Model Numbers for Detailed Information
  901 902 903 904 905 906 913 914 917 918 924 932 934 942
Analog Inputs
DC voltage               X            
DC current             X              
DC millivolt                     X      
Thermocouple                     X      
RTD/resistance                       X X  
Frequency                           X
AC current*             X              
Analog Outputs
DC voltage                   X        
DC current                 X          
Discrete Inputs
Active low X   X                      
Active high       X   X                
Discrete Outputs
Sinking (low-side switch)   X X                      
Sourcing (high-side switch)         X X                
Limit alarm (open drain MOSFETs)             X X X X X      
Limit alarm (solid state relay)                       X X X
Power Configuration
DC-powered X X X X X X X X X X X X X X
AC-powered X X X X X X X X X X X X X X
*requires external sensor

Everything you need to complete your DI-900MB network is available from DATAQ Instruments, Inc. - isolators, signal converters, signal boosters, power sources, and mounting hardware. Check out the Accessories.