Siemens SIMATIC S7-200 - A.13 Specifications for EM 231 Thermocouple, EM 231 RTD Modules

S7-200 Specifications
A-67
S7-200 Programmable Controller System Manual
A5E00066097-02
A.13 Specifications for EM 231 Thermocouple, EM 231 RTD Modules
Table A-21 Specifications for EM 231 Thermocouple and EM 231 RTD Modules
Description
Order Number
EM 231 AI 4 x Thermocouple
6ES7 231-7PD20-0XA0
EM 231 AI 2 x RTD
6ES7 231-7PB20-0XA0
General Specifications
Dimensions (W x H x D)
Weight
Power loss (dissipation)
71.2 mm x 80 mm x 62 mm
210 g
1.8 W
71.2 mm x 80 mm x 62 mm
210 g
1.8 W
Number of physical I/O 4 analog input points 2 analog input points
Power Consumption
From +5 VDC (from I/O bus)
From L+
L+ voltage range, Class 2 or DC sensor supply
87 mA
60 mA
20.4 to 28.8 VDC
87 mA
60 mA
20.4 to 28.8 VDC
LED indicator 24 VDC Power Supply Good: ON =
no fault, OFF = no 24 VDC power
SF: ON = module failure, BLINKING
= input signal error, OFF = no faults
24 VDC Power Supply Good: ON = no
fault, OFF = no 24 VDC power
SF: ON = module failure, BLINKING = input
signal error, OFF = no faults
Analog Input Specifications
Isolation
Field side to logic
Field side to 24 VDC
24 VDC to logic
500 VAC
500 VAC
500 VAC
500 VAC
500 VAC
500 VAC
Common mode input range
(input channel to input channel)
120 VAC 0
Common mode rejection > 120 dB @ 120 VAC > 120 dB @ 120 VAC
Input type Floating TC Module ground referenced RTD
Input ranges TC types (select one):
S, T, R, E, N, K, J
Voltage range: +/- 80 mV
RTD types (select one):
Pt -100Ω, 200Ω, 500Ω, 1000Ω
(with α = 3850 ppm, 3920 ppm,
3850.55 ppm, 3916 ppm, 3902 ppm)
Pt -10000Ω (α = 3850 ppm)
Cu -9.035Ω (α = 4720 ppm)
Ni -10Ω, 120Ω, 1000Ω
(with α = 6720 ppm, 6178 ppm)
R -150Ω, 300Ω, 600Ω FS
Input Resolution
Temperature
Voltage
Resistance
0.1° C / 0.1° F
15 bits plus sign
0.1° C / 0.1° F
15 bits plus sign
Measuring Principle Sigma-delta Sigma-delta
Module update time: All channels 405 mS 405 ms (700 ms for Pt10000)
Wire length 100 meters to sensor max 100 meters to sensor max
Wire loop resistance 100Ω max 20Ω, 2.7Ω for Cu max
Suppression of interference 85 dB @ 50 Hz/60 Hz/ 400 Hz 85 dB @ 50 Hz/60 Hz/400 Hz
Data word format Voltage: -27648 to + 27648 Resistance: -27648 to +27648
Maximum sensor dissipation 1m W
Input impedance >1 MΩ >10 MΩ
Maximum input voltage 30 VDC 30 VDC (sense), 5 VDC (source)
Resolution 15 bit + sign 15 bit + sign
Input filter attenuation -3 dB @ 21 kHZ -3 dB @ 3.6 kHz
Basic error 0.1% FS (voltage) 0.1% FS (resistance)
Repeatability 0.05% FS 0.05% FS
Cold junction error ±1.5 ° C