Siemens Simatic S7 Series System Manual

Technical specifications
A.5 Thermocouple and RTD expansion modules (EMs)
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
633
Technical data
EM RTD 2 x 16 bit (EM AR02)
EM RTD 4 x 16 bit (EM AR04)
Cable length (max.), in meters
100 m to sensor max.
100 m to sensor max.
Wire re-
sistance
(max.)
except 10 Ω
RTD
20 Ω 20 Ω
10 Ω RTD
2.7 Ω
2.7 Ω
Table A- 118 Diagnostics
Technical data
EM RTD 2 x 16 bit (EM AR02)
EM RTD 4 x 16 bit (EM AR04)
Overflow/underflow
1,2
Yes
Yes
Wire break
3
Yes
Yes
24 V DC low voltage
1
Yes
Yes
1
The overflow, underflow and low voltage diagnostic alarm information will be reported in the analog data values even if
the alarms are disabled in the module configuration.
2
For resistance ranges underflow detection is never enabled.
3
When wire break alarm is disabled and an open wire condition exists in the sensor wiring, the module may report ran-
dom values.
The EM RTD analog expansion module measures the value of resistance connected to the
module inputs. The measurement type can be selected as either "Resistor" or "Thermal
resistor".
● "Resistor": The nominal range full scale value will be decimal 27648.
● "Thermal resistor": The value will be reported in degrees multiplied by ten (for example,
25.3 degrees will be reported as decimal 253).
The EM RTD module supports measurements with 2-wire, 3-wire and 4-wire connections to
the sensor resistor.
Table A- 119 Ranges and accuracy for the different sensors supported by the RTD expansion module
Temperature coef-
ficient
RTD type
Under range
minimum
1
Nominal
range low limit
Nominal
range high
limit
Over range
maximum
2
Normal
range accu-
racy
@ 25°C
Normal
range accu-
racy -20°C
to 60°C
Pt 0.003850
ITS90
DIN EN 60751
Pt 10
-243.0°C
-200.0°C
850.0°C
1000.0°C
±1.0°C
±2.0°C
Pt 50
-243.0°C -200.0°C 850.0°C 1000.0°C ±0.5°C ±1.0°C
Pt 100
Pt 200
Pt 500
Pt 1000
Pt 0.003902
Pt 0.003916
Pt 0.003920
Pt 100
-243.0°C
-200.0°C
850.0°C
1000.0°C
± 0.5°C
±1.0°C
Pt 200
-243.0°C -200.0°C 850.0°C 1000.0°C ± 0.5°C ±1.0°C
Pt 500
Pt 1000
Pt 0.003910
Pt 10
-273.2°C
-240.0°C
1100.0°C
1295°C
±1.0°C
±2.0°C
Pt 50
-273.2°C
-240.0°C
1100.0°C
1295°C
±0.8°C
±1.6°C

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.