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EM231 RTD Measuring Module(231-7PB32,231-7PC32)

2AI/4AI×RTD,16BIT.Isolation.Temperature measurement accurate and stable

Order No.:CTS7 231-7PB32/CTS7 231-7PC32

Specification:2AI/4AI×RTD,16BIT.Isolation.

Product Description

Order Data 

Order Data 

Order No.

CTSC-200 EM231, 2AI×RTD         CTS7 231-7PB32
CTSC-200 EM231, 4AI×RTDCTS7 231-7PC32

 

Technical Spec

Performance Parameters

Specification

EM231, 2AI×RTD

 EM231, 4AI×RTD

Physical Features

   Dimensions(W×H×D)

71.2×80×62mm

71.2×80×62mm

   Power Loss(dissipation)

1.7W

1.7W
Power Consumption
    From +5V(from I/O bus)

87mA

    From L+60 mA
    L+  voltage range,class 2 or DC sensor supply20.4~28.8V DC
    LED indicator24 VDC Power Supply  Good: ON = no fault,OFF = no power ;
           SF: ON=module fault, Blink=input signal error, OFF=normal;
Analog Input Features
   Input typeModule ground reference RTD
   Input range

RTD type(select one per module):    
           Pt-100Ω,200Ω,500Ω,1000Ω(α=3850PPm,3920PPM,3850.55 PPM,3916PPM,3902PM)
           Pt-10000Ω(α=3850PPM)
           Cu-9.035Ω(α=4720PPM)
           Ni-10Ω,120Ω,1000Ω(α=6720PPM,6178PPM)
           R-150Ω,300Ω,600Ω

   Number of analog input points2 points4 points
Isolation

    Field to Logic

    Field to 24V DC
    24V DC to logic

500V AC
           500V AC
           500V AC

    Common mode input range
               (input channel to input channel)

120V AC

    Common mode rejection    

>120dB@120V AC

Input resolution

    Temperature

    Resistance

0.1℃/0.1℉ 

15 bits plus sign

    Measuring principle

Sigma-Delta
    Module update time for all channel425ms825ms
    Wire length to sensor, maximum100 m
   Wire loop resistance20Ω, 2.7KΩ for Cu maximum
   Suppression of interference85dB@ 50Hz/60Hz/400Hz
   Data word formatResistance: -27648 to +27648
    Maximum sensor dissipation1mW
   Input impedance≥10MΩ
    Maximum input voltage30 VDC (sensor), 5 VDC (source)
  Input filter attenuation-3dB@ 3.6kHz
  Basic error0.1% FS(Voltage)
  Repeatability0.05% FS
  24V DC supply voltage range20.4 to 28.8 VDC

You can wire the RTD sensors directly to the EM231 RTD modules, or you can  use extension wires. Please use shielded wires to acquire best noise immunity. If you use shielded wires, connect the shield to the ground on pin 1 to 4 of the signal connector. This ground is the same ground as is present on the power connector pin 3 to 7. If you do not use an RTD input channel, you should wire a resistor to the unused channel inputs in order to prevent errors from floating inputs from blocking error indications from valid channels.

Connect user power to the power connector pin 1 and 2. You must connect pin 3 to a nearby chassis ground (Figure 2). 

You can wire the RTD module to the sensor in three ways (shown in Figure 3). The most accurate mode is 4 wire (see Figure 3). The least accurate mode is 2 wire, which is only recommended if errors due to wiring can be ignored in your application. 

Figure 1  Connector Terminal Identification for RTD Modules

Configuration

The EM231 RTD modules provide a convenient interface to connect CTS7-200 PLC to several different RTDs. It also allows the CTS7-200 PLC to measure three different resistance ranges. You must use DIP switches to select RTD type, wiring configuration, temperature scale, and burnout direction. Both RTDs connect to a module must be of the same type.

The configuration DIP switches are located on the right bottom of the module, as shown in Figure 4. For the DIP switch settings to take effect, you need to power cycle the PLC or the 24V power supply.

Selecting the RTD type

Select RTD type by setting DIP switch 1 to switch 8  to correspond to the RTD as shown in Table 1 and Table 2.

Table 1  Selecting the RTD Type

RTD type

SW1

SW2

SW3

SW4

SW5

100 Pt 0.003850(Default)00000
200Ω Pt 0.00385000001
500Ω Pt 0.00385000010
1000Ω Pt 0.00385000011
100Ω Pt 0.00392000100
200Ω Pt 0.00392000101
500Ω Pt 0.00392000110
1000Ω Pt 0.00392000111
100Ω Pt 0.0038505501000
200Ω Pt 0.0038505501001
500Ω Pt 0.0038505501010
1000Ω Pt 0.0038505501011
100Ω Pt 0.00391601100
200Ω Pt 0.00391601101
500Ω Pt 0.00391601110
1000Ω Pt 0.00391601111
100Ω Pt 0.0030210000
200Ω Pt 0.00390210001
500Ω Pt 0.00390210010
1000Ω Pt 0.00390210011
Reserved10100
100Ω Ni 0.0067210101
120Ω Ni 0.0067210110
1000Ω Ni 0.0067210111
100Ω Ni 0.00617811000
120Ω Ni 0.00617811001
1000Ω Ni 0.00617811010
10000Ω Pt 0.00385011011
10Ω Cu 0.00427011100
150Ω FS Resistance11101
300Ω FS Resistance11110
600Ω FS Resistance11111

 

Installation

Size Diagram

Wiring Diagram

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