The BusWorks® 900 MB Series Discrete I/O Module, part number 903MB-0900, features twelve channels that can be configured as either inputs or outputs, allowing for flexible application in various control systems. It operates within a voltage range of 0 to 35V DC and supports both AC and DC power sources, specifically 10 to 36V DC or 24V AC. The module utilizes the Modbus-RTU protocol for high-speed RS-485 communication, enabling efficient data transfer in industrial environments. This model includes active-low buffered inputs and open-drain outputs designed for low-side switching applications. It provides three-way isolation between I/O, power, and network circuits, enhancing reliability and reducing the risk of ground loops. The 903MB-0900 also features built-in over-temperature and over-current protection for outputs, as well as watchdog timers to ensure system stability during communication interruptions. Its compact design allows for high-density mounting, making it suitable for both control room and field applications.
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).
| Acromag, Inc. | |
|---|---|
| Product Category | Data Acquisition |
| Product Number | 903MB-0900 |
| Product Name | BusWorks™ 900 MB Series Discrete I/O Module |
| Data Acquisition | Input/Output Module |
| Form Factor | DIN Rail |
| Excitation | Voltage |
| User Interface | Computer Programmable |
| Host Connection | RS232/422/485 |
