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EM231 Analog Input (231-0HC32)

4AI×12BIT,Current/voltage input.Isolation.

Order No.:CTS7 231-0HC32

Specification:4AI×12BIT, Current/voltage input.Isolation.

Product Description

Order Data

Order Data

Order No.

CTSC-200 EM231 Analog Input Module, 4AI×12BIT, Voltage/Current Input, Isolation      CTS7 231-0HC32

 


Technical Spec

Performance Parameters

Specification

EM231, 4 AI×12BIT

Physical Features

   Dimensions(W×H×D)

71.2×80×62mm

   Power Loss(dissipation)

2W

Power Consumption

    From +5V(from I/O bus)

34 mA

    From L+

40 mA

    L+  voltage range,class 2 or DC sensor supply

20.4~28.8V DC

    LED indicator

24 VDC Power Supply  Good
           ON = no fault,
           OFF = no 24 VDC power

Analog Input Feature 

    Number of analog input points

4 points

    Isolation(field side to logic circuit)

Optical isolated: 500VAC, 1 minute

    input type

Differential

    Input Range

        Voltage(unipolar)

0~10V, 0~5V

        Voltage(bipolar)

±5V, ±2.5V

        Current

0~20 mA

        Data Range

15~30V

        Bipolar,full-scale range

0~32000

        Unipolar, full-scale range

-32000~32000

Input Resolution

        Voltage(unipolar)

2.5 mV (0~10V)

1.25 mV (0~5V)

        Voltage(bipolar)

2.5 mV (±5V)

1.25 mV (±2.5V)

        Current

5μA (0~20mA)

    Analog to digital conversion time

<300μs

    Analog input step response

1.5ms

    Common mode rejection

40dB,DC to 60Hz

    Common mode voltage

Signal voltage + Common mode voltage < 12V

    Input Impedance

≥10MΩ

    Input filter attenuation

-3db @ 3.1kHz

    Maximum input voltage

30V

    Maximum input current

30mA

    ADC resolution

12BIT

 

Calibration and Configuration
  • Location of the calibration and configuration switch

  • Input Calibration

The calibration adjustment will affect the instrumentation amplifier stage which follows the analog multiplexer. so the calibration affects all user input channels. Variations exist in the component parameters of each input circuit before the analog multiplexer will cause slight differences in the reading values between different channels connected to the same input signal even after calibration.

If need to acquire the specifications contained in this data sheet, may be you need to enable analog input filters for all inputs of the module. Please select 64 or more samples to calculate the average value.

To calibrate the input, please use the following steps.

    1. Turn off the power to the module, select the desired input range.

    2. Turn on the power to the CPU and module. Allow the module to stabilize for at least 15 minutes.

    3. Using a transmitter, a voltage source, or a current source, connect a full-scale value signal to one of the input channels, read the value reported to the CPU.

    4. Adjust the GAIN potentiometer until the reading is 32000.

  • Configuration

Table 1 shows how to configure the EM 231 module using the configuration DIP switches. Switches 1, 2, and 3 select the analog input range. All inputs are set to the same analog input range. In this table, ON is closed, and OFF is open. (SW4 toSW6 should be set to the OFF position)

Table 1   EM 231 Configuration Switch Table to select Analog Input Range

Unipolar

Full-S cale InputResolution
SW1SW2SW3

ON

OFFON0 to 10V2.5mV
ONOFF0 to 5V1.25mV
0 to 20mA5 uA
BipolarFull-Scale InputResolution
SW1SW2SW3
OFFOFFON± 5 V2.5mV
ONOFF± 2.5 V1.25mV


Input Data Word Format

Note

The 12 bits readings of the analog-to-digital converter (ADC) are left-justified in the input data word format. The MSB is the sign bit: zero indicates a positive data word value. In unipolar format, the three trailing zeros cause the data word to be changed by a count of eight for each one-count change in the ADC value. In bipolar format, the four trailing zeros cause the data word to be changed by a count of sixteen for each one count change in the ADC value.



Installation

Size  Diagram


Wiring Diagram 

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