942MB: Frequency/Pulse Counter Modbus-RTU Input Modules with Periodic or Pulse Waveform Input
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Product short description:
- 2 input channels, 0 to 50KHz in 3 selectable ranges: Amplitudes up to 140V AC peak, Amplitudes up to 200V peak, Pulse counter range of 0 to 65535
- Solid-state discrete output relays (1A DC loads), 0 to 48V DC
- 10 to 36V DC, 24V AC power
- Modbus-RTU high-speed RS-485
This signal conditioner is a two-channel analog input module with discrete outputs and Modbus communication. It conditions periodic or pulse waveform inputs and provides solid-state relays for limit alarms or ON/OFF control.
942MB: Frequency/Pulse Counter Modbus-RTU Input Modules with Periodic or Pulse Waveform Input Description
This signal conditioner is a two-channel analog input module with discrete outputs and Modbus communication. It conditions periodic or pulse waveform inputs and provides solid-state relays for limit alarms or ON/OFF control.
Versatile inputs accommodate many applications using TTL, magnetic pickups, proximity sensors, or a variety of switches (high/low-side transistor, dry contact, open drain, open collector).
Bipolar and unipolar waveforms are supported with a selectable input bias that accepts both zero and non-zero crossing signals. Voltage threshold and relative hysteresis are also user selectable.
Inputs may also function as event counters with separate microcontrollers for each channel. The module counts pulses on the positive or negative edge. It can wrap around to zero for continuous counting, latch at a programmed count value (setpoint), or automatically reset itself to zero after reaching a setpoint value. Software controls enable remote resets.
A variety of filters help remove noise, jitter, and other mechanical effects to prevent false counts.
The discrete outputs can operate as independent alarms or provide on/off control regulated by the host system. As limit alarms, each output can be set for high and/or low setpoints exclusively tied to an analog input.
These low cost modules are ideal for standalone alarms as well as for local backup of the primary control system.
Learn about the 900MB Series and view all models >
942MB: Frequency/Pulse Counter Modbus-RTU Input Modules with Periodic or Pulse Waveform Input Features & Benefits
- Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
- Separate microcontrollers on each channel for pulse counting and period measurement
- Solid-state relay outputs enable local limit alarms or host-controlled on/off switching
- Bipolar and unipolar input signal support
- Programmable pulse counter functions
- Input filtering functions include hysteresis, averaging, debounce, relay time delay, and alarm deadband controls
- 4-way isolation (input, output, power, network)
- Watchdog timers provide a failsafe output
- 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)
Manuals
942MB User Manual (Log in to download the file)
How to Use SIIG USB-to-Serial Cable With Windows Tech Note (Log in to download the file)
IntelliPack & Series 900MB Configuration Software Windows 7 or 8 User Manual (Log in to download the file)
IntelliPack & Series 900 Configuration Software: Windows 10 User Manual (Log in to download the file)
Brochures
-
5034-202: RS-485 to 3-wire Cable Converter and Cable
RS-485 to 3-wire cable converter and cable, DB-9M to 3 x 12AWG RS-485 cable, 8 ft. -
5034-214: RS232 to RS485 Serial Port Converter
Non-isolated RS232-to-RS485 serial port converter, RS232 port-powered, DB-9F to DB-9F. -
900C-SIP: Configuration Software Interface Package
- Configuration Software
- USB-to-RS232 Adapter
- RS232-to-RS485 Adapter
- Interface Cable
Additional information
Weight | 16 oz |
---|---|
Dimensions | 1.5 × 5.5 × 4.5 in |
Part Number | 942MB-0900: 2 input channels |
Configuration | Windows Software Configuration |
Communication | Modbus-RTU, RS422/485 |
Product Series | BusWorks 900MB |
-
Description
942MB: Frequency/Pulse Counter Modbus-RTU Input Modules with Periodic or Pulse Waveform Input Description
This signal conditioner is a two-channel analog input module with discrete outputs and Modbus communication. It conditions periodic or pulse waveform inputs and provides solid-state relays for limit alarms or ON/OFF control.
Versatile inputs accommodate many applications using TTL, magnetic pickups, proximity sensors, or a variety of switches (high/low-side transistor, dry contact, open drain, open collector).
Bipolar and unipolar waveforms are supported with a selectable input bias that accepts both zero and non-zero crossing signals. Voltage threshold and relative hysteresis are also user selectable.
Inputs may also function as event counters with separate microcontrollers for each channel. The module counts pulses on the positive or negative edge. It can wrap around to zero for continuous counting, latch at a programmed count value (setpoint), or automatically reset itself to zero after reaching a setpoint value. Software controls enable remote resets.
A variety of filters help remove noise, jitter, and other mechanical effects to prevent false counts.
The discrete outputs can operate as independent alarms or provide on/off control regulated by the host system. As limit alarms, each output can be set for high and/or low setpoints exclusively tied to an analog input.
These low cost modules are ideal for standalone alarms as well as for local backup of the primary control system.
Learn about the 900MB Series and view all models >
942MB: Frequency/Pulse Counter Modbus-RTU Input Modules with Periodic or Pulse Waveform Input Features & Benefits
- Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
- Separate microcontrollers on each channel for pulse counting and period measurement
- Solid-state relay outputs enable local limit alarms or host-controlled on/off switching
- Bipolar and unipolar input signal support
- Programmable pulse counter functions
- Input filtering functions include hysteresis, averaging, debounce, relay time delay, and alarm deadband controls
- 4-way isolation (input, output, power, network)
- Watchdog timers provide a failsafe output
- 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)
-
Tech Papers
What is Modbus/RS485? An Introduction - 8500648 (Log in to view the file)Modbus/RS485 Network an Introduction White Paper This white paper describes the operation of Modbus as it relates to Acromag Series 900MB I/O modules. Learn more: What is Ethernet/IP?How to Configure Kepware KEPServerEX 5.0 for Communications with Modbus I/O Modules - 8500880Configuring Kepware KEPServerEX 5.0 for Communications with Acromag BusWorks Modbus I/O Modules Introduction This document provides example steps for configuring the Kepware KEPServerEX OPC Server for communications with Acromag Busworks Modbus RTU and Modbus TCP/IP Distributed I/O Modules. Once the server is configured, data may be read from or written to the I/O module using...How to Configure LabVIEW to Communicate with Modbus I/O Modules Via an OPC Server - 8500881Configuring LabVIEW 2009 to Communicate with Acromag BusWorks and EtherStax Modbus I/O Modules via an OPC Server Introduction National Instruments™ LabVIEW can be used to monitor and control Acromag BusWorks ® and EtherStax ® Modbus I/O modules via an OPC server. A separate application note, Configuring Kepware KEPServerEX® 5.0 for communications with Acromag BusWorks and EtherStax... -
Specs & Data Sheets
Manuals
942MB User Manual (Log in to download the file)
How to Use SIIG USB-to-Serial Cable With Windows Tech Note (Log in to download the file)
IntelliPack & Series 900MB Configuration Software Windows 7 or 8 User Manual (Log in to download the file)
IntelliPack & Series 900 Configuration Software: Windows 10 User Manual (Log in to download the file)
Brochures
-
Software
900C-SIP: Modbus RTU Configuration Software Information Page (Log in to download the file) -
Accessories
-
5034-202: RS-485 to 3-wire Cable Converter and Cable
RS-485 to 3-wire cable converter and cable, DB-9M to 3 x 12AWG RS-485 cable, 8 ft. -
5034-214: RS232 to RS485 Serial Port Converter
Non-isolated RS232-to-RS485 serial port converter, RS232 port-powered, DB-9F to DB-9F. -
900C-SIP: Configuration Software Interface Package
- Configuration Software
- USB-to-RS232 Adapter
- RS232-to-RS485 Adapter
- Interface Cable
-
-
Additional information
Additional information
Weight 16 oz Dimensions 1.5 × 5.5 × 4.5 in Part Number 942MB-0900: 2 input channels
Configuration Windows Software Configuration
Communication Modbus-RTU, RS422/485
Product Series BusWorks 900MB
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