Siemens S5-135U/155U appendix Mux

Analog Input/Output Modules

Example:

(Special case) The temperature of the busbar of an electroplating bath is to be measured with an uninsulated thermocouple.

Sensor,			Analog Input Module
Not Isolated	M+
+			A
			MUX
U E
±	M±
		Range
		Card for
		4 Inputs
+			#
U CM
±
			D
		U CM	0 V Bus

Figure 9-7 Measuring Circuit without Equipotential Bonding Conductor for the 460 Analog Input Module

The potential of the busbar with respect to the reference potential of the module is, for example, 24 V DC. A 460 analog input module with isolated input is used (UCM = 60 V AC/75 V DC). An equipotential bonding conductor must not be laid here because it would short-circuit the busbar.

9-18	System Manual
	C79000-G8576-C199-06