Siemens M7-400, S7-400 Technical Specifications of the SM 431; AI 8 RTD 16 Bit, , ,

Analog Modules

5-125

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Technical Specifications of the SM 431; AI 8 RTD 16 Bit

Dimensions and Weight

Dimensions W H D

(in millimeters) 25 290 210

Weight Approx. 650 g

Data for Specific Module

Number of inputs

•For resistance-type sensor

Length of cable

•Shielded Max. 200 m

Voltages, Currents, Potentials

Constant current for

resistance-type sensor Max. 1 mA

Isolation

•Between channels and

backplane bus Yes

Permitted potential difference

•Between MANA and

Minternal (UISO)120 VAC

Insulation tested with 1500 VAC

Current consumption

•From the backplane bus Max. 650 mA

Power dissipation of the

module Typ. 3.3 W

Analog Value Generation

Measuring principle Integrative

Integration/conversion time/

resolution (per channel)

•Parameterizable

(Does not go into the

response time)

Yes

•Basic conversion time in

ms 22/25

•Additional conversion time

for measuring resistance,

inms

Max. 200

•Resolution including sign 16/16 bit

•Noise suppression

for interference frequency

f1 inHz

60/50

Smoothing of the measured

values Parameters can be

assigned in 4 stages

Basic response time of module

(all channels enabled) 22/25 ms

Suppression of interference, Limits of Error

Noise suppression for f = n (f1 "1%),

(f1 = interference frequency) n = 1, 2, etc.

•Common-mode

interference (UCM < 120V)

•Series-mode interference

(peak value of interference

< rated value of the input

range)

> 100 dB

> 50 dB

Crosstalk between the inputs > 70 dB

Operational limit (over entire temperature range, referred

to 0 to 60 C input range)

•RTD input " 1.0 °C

Basic error (operational limit at 25 °C, referred to input

range)

•RTD input " 0.5 °C

Temperature error (with

reference to the input range) " 0.007%/K

Linearity error (with reference

to the input range) " 0.2 °C

Repeat accuracy (in the steady

state at 25 °C, referred to the

input range)

" 0.2 °C

Status, Interrupts, Diagnostics

Interrupts

•Hardware interrupt when

limit has been exceeded Parameters can be

assigned

•Diagnostic Interrupt Parameters can be

assigned

Diagnostic functions Parameters can be

assigned

•Group error display

– For internal fault

– For external fault

Red LED (INTF)

Red LED (EXTF)

•Diagnostic information can

be displayed Possible

Data for Selecting a Sensor

Input range (rated values) input

resistance

•Resistance thermometer Pt 100, Pt 200, Pt 500,

Pt 1000, Ni 100,

Ni 1000

•Maximum input voltage for

voltage input (destruction

limit)

35 V continuous;

75 V for max. 1 s

(duty factor 1:20)

Connection of the sensor

•For measuring resistance

With three-conductor

terminal Possible

With four-conductor

terminal Possible

Characteristic linearization

•For resistance

thermometer Pt 100,0,00385 to DIN

IEC 751

Ni 100, 0,00618 to DIN

43760

Unit for temperature

measurement Degrees Celsius;

degrees Fahrenheit