Siemens SIMATIC ET 200SP Operating Instructions

Supply voltage L+/M
With a dark BaseUnit, the supply voltage of the left BaseUnit is used.
The electronic weighing system monitors whether the supply voltage is connected.
Load cell connection
In case of 6-wire load cells, the supply voltage is measured over the terminals 1 (SEN+) and 7
(SEN-) and used as reference. A voltage drop on the load cell cable does not have an effect on
the measurement.
You can connect 4-wire as well as 6-wire load cells. The electronic weighing system is set for
operation with 6-wire load cells in the factory.
If the power of the electronic weighing system-internal power supply of the load cells is not
sufficient, use an external power supply source to supply the load cells.
Note
Compensate for interferences when connecting 4-wire load cells
If you use 4-wire load cells, we recommend that you use a 6-wire cable between the electronic
weighing system and the terminal box.
● Set a wire jumper in the terminal box between EXC+/SEN+ and EXC-/SEN-.
The wire jumper compensates for interferences between the electronic weighing system
and the terminal box.
Connecting
4.2 Connection to electronic weighing system
Technology module TM SIWAREX WP351 HF
Operating Instructions, 01/2020, A5E47521010-AA 25

Siemens SIMATIC ET 200SP Specifications

General

System Type	Distributed I/O System
Mounting	DIN Rail
Communication Protocol	PROFINET, PROFIBUS
IP Rating	IP20
Category	I/O Systems
Supply Voltage	24 V DC
Modularity	Yes
Hot Swapping	Yes
Storage Temperature	-40°C to +70°C
Digital Inputs	Yes
Digital Outputs	Yes
Analog Inputs	Yes
Analog Outputs	Yes
Communication Interface	PROFINET, PROFIBUS
Number of Modules	Up to 64
Relative Humidity	5 to 95% (non-condensing)
Operating Temperature	-25°C to +60°C