Multi-Channel Modbus-RTU Discrete I/O Modules

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SKU: 901/902/903MB Category: Acromag Modbus RTU Tags: Digital, Input, Modbus RTU, Output, Voltage

These modules provide twelve discrete input and/or output channels. Isolation separates the I/O, power, and network circuits. Network communication adheres to the industry-standard RS-485 Modbus RTU protocol. Both AC and DC power sources are supported with wide range, nonpolarized, diode-coupled terminals.

The open-drain outputs are intended for current-sinking or low-side switching applications. The buffered inputs are active-low. These models are the complement of the 904, 905, and 906 units which have open-source, high-side output switches and active-high inputs. Socketed pull-up resistors are easily removed or exchanged to satisfy your application requirements.

Combining flexible I/O types, wide I/O ranges, 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).

  • 901MB-0900 – Modbus RTU Discrete Input Module: 12 input channels
  • 902MB-0900 – Modbus RTU Discrete Output Module: 12 output channels
  • 903MB-0900 – Modbus RTU Discrete Input/Output Module: 12 input & 12 output channels.