901MB / 902MB / 903MB
901MB / 902MB / 903MB
Multi-Channel Modbus-RTU Discrete I/O Modules
Multi-Channel Modbus-RTU Discrete I/O Modules
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.
| Name | Action |
|---|---|
| Datasheet for 901MB / 902MB / 903MB |
- Features
- Ordering info
- Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
- Twelve I/O channels in a single inch-wide unit reduces system costs and saves panel space
- High-voltage, high-current, open-drain outputs enable direct (low-side) control of external devices
- High-voltage buffered inputs monitor discrete levels from a variety of industrial devices
- Tandem input/output circuitry (903 models only) connects input buffers with open-drain outputs for convenient loopback monitoring of the output state
- Outputs have built-in over-temperature and over-current shut-down protection, plus active clamping circuits for switching inductive loads
- 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, I/O, and network circuitry
- Self-diagnostics monitor microcontroller activity to detect operational failures (lock-up) and execute a reset to restore communication
- Operating temperature: -25°C to +70°C (-13°F to +158°F).
Available Models
| Model No. | Description | |
|---|---|---|
| 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. |