Siemens S7-300 appendix Analog I/O, Wiring of the current/voltage inputs

Technical data of CPU 31xC

6.6 Technical data of the integrated I/O

6.6.2Analog I/O

Wiring of the current/voltage inputs

The figure below shows the wiring diagram of the current/voltage inputs operated with 2-/4-wire measuring transducers.

			+
		2-wire
		signal converter
8			-
AI2u	+
9
AI2I
	-
10
AI2c

20

MANA

+ 24 V

M

Al0: Pin 2 to 4

AI1: Pin 5 to 7

Al2: Pin 8 to 10

Al3: Pin 11 to 13

We recommend connecting AIxC with MANA using a bridge.

Figure 6-1 Connection of a 2-wire measuring transducer to an analog current/voltage input of CPU 313C/314C-2

				L+	M	AI0 : Pin 2 to 4
AI2u	8					AI1 : Pin 5 to 7
AI2I	9	+	+	4-wire		AI2 : Pin 8 to 10
AI2c	10	-	-	signal converter		AI3 : Pin 11 to 13
AI3u	11
AI3I	12
			M
AI3c	13

		Short-circuit non-wired input channels
20		and connect AlxC with MANA.
	MANA	We recommend connecting Alx	C	with M	ANA

when using the 4-wire signal converter.

Figure 6-2 Connection of a 4-wire measuring transducer to an analog current/voltage input of CPU 313C/314C-2

6-34	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05