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Product short description:
  • 4 input channels, thermocouple (types J, K, T, R, S, E, B, N) or millivolt (±100mV DC) input
  • 4 alarm channels, open drain MOSFETS (1A DC loads, 0 to 35V DC)
  • 10 to 36V DC, 24V AC power
  • Modbus-RTU high-speed RS-485
Kindly go to setting page and check the option "Place them manually"

This signal conditioner is a four-channel analog input module with four discrete outputs. It filters and linearizes thermocouple inputs while providing isolation between input, output, power, and network circuits. Cold junction compensation and upscale/downscale sensor break detection are standard. AC and DC power sources are supported with non-polarized, diode-coupled terminals.

The programmable inputs accommodate eight thermocouple types plus wide-range millivolt signals. Flexible discrete outputs operate as alarms or on/off controllers. As limit alarms, each discrete output can be configured with high and/or low set-points exclusively tied to an analog input channel. Alarm trips function without host communication enabling low-cost stand-alone alarms as well as local backup for the primary control system. Otherwise, on/off control is based on commands issued by the host system.

Combining flexible transmitter functions, mixed signal I/O, alarm support, 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).

Thermocouple or Millivolt Input
Limit Alarms or Discrete Outputs

Model: 924MB: 4 input channels
Input:
Four input channels:
Thermocouple (types J, K, T, R, S, E, B, N)
±100mV DC
Output:
Four output channels:
Open-drain MOSFETs (1A DC loads)
0 to 35V DC
Network Communication: Modbus-RTU high-speed RS-485
Power Requirement:
10 to 36V DC
24V AC
Approvals”
CE marked. UL, cUL listed
Class I; Division 2; Groups A, B, C, D

Performance Specifications

General Output

Resolution:
±100mV DC input: 0.1%
Thermocouple input: 0.1°C (0.18°F)
Ambient Temperature Effect: Better than ±0.005% of input span per °C, or ±1.0uV/°C, whichever is greater.
Noise Rejection:
Normal mode: 40dB @ 60Hz, typical
Common mode: 140dB @ 60Hz, typical
Input Filter Bandwidth: -3dB at 3Hz, typical
Input Conversion Rate: 90ms per channel

Thermocouple Input

Thermocouple Input Ranges: Thermocouple type user-configured. Type selected applies to all channels. Signal linearization, cold-junction compensation, and open circuit or lead break
detection are included.

TC                  °C Range (°F Range)                        Accuracy
J            -210 to  760°C   (-346 to 1400°F)                ±0.5°C
K            -200 to 1372°C (-328 to 2502°F)                ±0.5°C
T            -260 to  400°C  (-436 to 752°F)                   ±0.5°C
R             -50 to 1768°C (-58 to 3214°F)                    ±1.0°C
S             -50 to 1768°C (-58 to 3214°F)                    ±1.0°C
E           -200 to 1000°C (-328 to 1832°F)                   0.5°C
B            260 to 1820°C (500 to 3308°F)                  ±1.0°C
N          -230 to 1300°C (-382 to 2372°F)                 ±1.0°C
Note 1: Accuracy is given with CJC switched off.
Relative inaccuracy with CJC enabled may increase by ±0.5°C.

Thermocouple Break Detection: TC sensor failure can be configured for either upscale or downscale. Selection applies to all channels.

DC milliVolt Input

milliVolt Input Ranges: ±100mV DC
milliVolt Input Accuracy: ±0.1% of input range

Discrete Output

Output Type: Four independent open drain MOSFET switches with a common return that operate as low-side switches.
Output Voltage Range:
0 to 35V DC, 1A DC maximum for each output.
External voltage source required.
Output ON Resistance: 0.15 ohms maximum
Operation: Digital outputs are set to their OFF state following a software or power-on reset. Outputs can optionally be set to user-defined states following a watchdog timeout. Watchdog timeout output control takes precedence over limit alarm control. Alarm control takes precedence over host control.
Output Response Time: 4.1ms typical, from receipt of command to gate transition of the output MOSFET.

Communication

Supported Modbus Commands: The command/response protocol for communicating with this module adheres to the Modbus/RTU standard for the following Modbus functions:

  • Read Coil
  • Read Holding Registers
  • Read Input Registers
  • Force Single Coil
  • Preset Single Register
  • Force Multiple Coils
  • Preset Multiple Registers
  • Report Slave ID
  • Reset Slave

LED Indicators: LEDs indicate power, status, and discrete level/alarm

Power and Isolation

Power Requirements:
10 to 36V DC
22 to 26V AC

Supply Current:
Supply           Current Draw
10V DC     100mA maximum
24V DC       45mA maximum
24V AC       85mA rms maximum

Isolation
1500V AC for 60 seconds or 250V AC continuous.
4-way isolation between input, network, power and discrete I/O circuits. Inputs are isolated channel-to channel for common mode voltage to ±5V DC.

  • Standard Modbus-RTU protocol with high-speed RS-485 communication (up to 115K bps)
  • 16-bit sigma-delta A/D yields 0.1°C resolution and 0.5°C measurement accuracy
  • Thermocouple linearization and sensor break detection ensure reliable measurements
  • Four discrete outputs enable local temperature limit alarms or host-controlled on/off switching
  • Heavy-duty 1A solid-state relays provide dependable on/off control of industrial devices
  • Self-calibration lowers maintenance costs by reducing periodic manual calibration checks
  • Watchdog timers provide a configurable fail-safe output state for use when host I/O communication is lost
  • Four-way isolation eliminates potential ground loops between power, input, output 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).
Modbus/RS485 an Introduction White Paper (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.
How to Configure Kepware KEPServerEX 5.0 for Communications with Acromag BusWorks Modbus I/O Modules Application Note
Configuring 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 2009 to Communicate with Acromag BusWorks and EtherStax Modbus I/O Modules Via an OPC Server Application Note
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 Modbus I/O Modules, outlines configuration of a KEPServerEX OPC server. This document focuses on setting up controls and...

Manuals

924MB User Manual (Log in to download the file)

BusWorks 900MB Modbus RTU Configuration Software (Log in to download the file)
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Additional information

Weight 16 oz
Dimensions 12 × 13 × 3 in
Part Number

4001-112: ,Type A to Type B, 4001-113: Type A to Mini-B, 5028-565: Micro USB to USB OTG, 4001-095: USB-to-DB9

  • Description

  • Features & Benefits

    • Standard Modbus-RTU protocol with high-speed RS-485 communication (up to 115K bps)
    • 16-bit sigma-delta A/D yields 0.1°C resolution and 0.5°C measurement accuracy
    • Thermocouple linearization and sensor break detection ensure reliable measurements
    • Four discrete outputs enable local temperature limit alarms or host-controlled on/off switching
    • Heavy-duty 1A solid-state relays provide dependable on/off control of industrial devices
    • Self-calibration lowers maintenance costs by reducing periodic manual calibration checks
    • Watchdog timers provide a configurable fail-safe output state for use when host I/O communication is lost
    • Four-way isolation eliminates potential ground loops between power, input, output 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).
  • Tech Papers

    Modbus/RS485 an Introduction White Paper (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.
    How to Configure Kepware KEPServerEX 5.0 for Communications with Acromag BusWorks Modbus I/O Modules Application Note
    Configuring 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 2009 to Communicate with Acromag BusWorks and EtherStax Modbus I/O Modules Via an OPC Server Application Note
    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 Modbus I/O Modules, outlines configuration of a KEPServerEX OPC server. This document focuses on setting up controls and...
  • Specs & Data Sheets

    Manuals

    924MB User Manual (Log in to download the file)

  • Software

    BusWorks 900MB Modbus RTU Configuration Software (Log in to download the file)
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      • AC Current Sensor to precondition an AC current input signal
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      • Lightweight and compact size
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      Select options
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      • Simplifies wiring connections on Acromag I/O Modules
      • Barrier strip or spring clamp terminal block kits
      • Provide safe and secure wiring connections
      $30$40
      Select options
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      USB Cables

      Various USB cables
      $20
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  • Additional information

    Additional information

    Weight 16 oz
    Dimensions 12 × 13 × 3 in
    Part Number

    4001-112: ,Type A to Type B, 4001-113: Type A to Mini-B, 5028-565: Micro USB to USB OTG, 4001-095: USB-to-DB9