Siemens ST PCS 7 manual 11/15, SM 321 modules with diagnostics capability

© Siemens AG 2007

						Process I/O
					ET 200M distributed I/O
						DI - digital input modules
■Selection and Ordering Data		Order No.		■Selection and Ordering Data		Order No.
	SM 321 for non-floating contacts (supply with AC voltage)				16 inputs, NAMUR	6ES7 321-7TH00-0AB0
					Redundant design possible
	8 inputs, 120/230 V AC	6ES7 321-1FF10-0AA0	B)
					(module redundancy)
	• Electrically isolated in groups
					• Electrically isolated in groups
	of 1
					of 8
	• Front connector required:
					• Time stamping in association
	40-contact
					with IM 153-2 High Feature, ac-
	SM 321 modules with diagnostics capability				curacy 5 ms, rising or falling
	(IM 153-2 High Feature interface module required)				edge, can be parameterized
	for floating contacts (supply with DC voltage)				channel-granular
	16 inputs, 24 V DC	6ES7 321-7BH01-0AB0			• Two sensor supplies (8.2 V DC
					or 18 V DC each)
	Redundant design possible
					• Connection of NAMUR sensors
	(module and channel redun-
	dancy)				or contacts with resistor circuit
	• Electrically isolated in groups				• Pulse stretching
	of 16				• Channel-granular diagnostics
	• Time stamping in association
					(short-circuit, open-circuit, chat-
	with IM 153-2 High Feature, ac-				ter monitoring, discrepancy with
	curacy 5 ms, rising or falling				changeover contacts)
	edge, can be parameterized				• Diagnostics inside module
	channel-granular
					• Front connector required:
	• Two short-circuit-proof sensor
					40-contact
	supplies for 8 channels each
					B) Subject to export regulations: AL: N, ECCN: EAR99H
	• Sensor supply by the module,
	additional external redundant
	sensor supply possible

• Diagnostics of missing sensor supply for channel group

(8 channels)

• Diagnostics inside module

• Wire break monitoring

• Front connector required: 20-contact

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Siemens ST PCS 7 · November 2007

11/15