Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-63
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Table 4-45 Ordering Data of the Comparison Point
Recommended Compensating Box
Order number
Reference junction with integrated power supply
unit, for rail mounting
Auxiliary power 220 VAC
110 VAC
24 VAC
24 VDC
Connection
to thermocouple Fe-CuNi Type L
Fe/Cu Ni Type J
Ni Cr/Ni Type K
Pt 10% Rh/Pt Type S
Pt 13% Rh/Pt Type R
Cu/Cu Ni Type U
Cu/Cu Ni Type T
Reference temperature 0 C
M72166-

B1
B2
B3
B4
1
2
3
4
5
6
7
00
Connecting to the comparison point (Order No. M72166-xxx00)
If all thermocouples connected to the inputs of the module have the same
comparison point, you compensate as follows:
M+
M–
M+
M–
Backplan
e
bus
ADC
M
L+
Compensating leads
(same material as
thermocouple)
Copper
wire
COMP
–
/M
ANA
COMP
+
Thermoco
uples
13
Auxiliary power
+
–
The terminals for the
compensating wire
must be short-
circuited!
Output (Cu wires)
89
1112
–
+
SIEMENS
M72166-
Logic
Figure 4-25 Connection of Thermocouples with Comparison Point (Order No. M72166-xxx00) to an
Isolated AI

Siemens SIMATIC S7-300 Module data Specifications

General

Series	S7-300
Manufacturer	Siemens
Protection Class	IP20
System	SIMATIC S7-300
Digital Inputs	Varies by module
Digital Outputs	Varies by module
Analog Inputs	Varies by module
Analog Outputs	Varies by module
Central Processing Unit	Varies by CPU model
Supply Voltage	24V DC or 120/230V AC
CPU Type	Varies (e.g., CPU 312, CPU 315, etc.)
Memory	Varies by CPU model
Communication Interfaces	MPI, PROFIBUS
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Relative Humidity	10% to 95% (non-condensing)