Siemens 6ES7326-1RF00-0AB0 SIMATIC S7-300 SM 326 Fail-Safe NAMUR Digital Input Module

Siemens 6ES7326-1RF00-0AB0 Eight-Channel 24 V DC F-DI NAMUR Module

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SIMATIC S7-300 SM 326

6ES7326-1RF00-0AB0

Fail-Safe NAMUR Digital Input Module

8 × NAMUR DI

24 V DC fail-safe input for S7 F-systems

Product Overview

The Siemens 6ES7326-1RF00-0AB0 is a SIMATIC S7-300 SM 326 fail-safe digital input module for NAMUR sensors in S7 F-system safety applications. It provides eight inputs that can be evaluated as eight single-channel or four two-channel safety signals.

The module uses a 24 V DC supply, provides eight 8.2 V DC encoder-supply outputs and supports diagnostic alarms. Procurement should match the exact article number because the official successor requires an application-level safety and compatibility review.

Product Snapshot
Manufacturer	Siemens
Product family	SIMATIC S7-300 SM 326
Complete part number	6ES7326-1RF00-0AB0
Accurate product type	Fail-Safe NAMUR Digital Input Module

Commercial Status

Commercial Status
Official lifecycle	PM490: Start of final year of support
Effective date	Product discontinued since 2024-05-01
Official successor	6ES7326-1RF01-0AB0
Procurement note	Product is no longer available from Siemens; verify exact revision, safety documentation and successor engineering before purchase.

Verified Technical Data

Technical Data
Module class	SIMATIC S7-300 SM 326 fail-safe digital input
Digital inputs	8; usable as 8 single-channel or 4 two-channel inputs
Rated supply voltage	24 V DC with reverse-polarity protection
Input characteristic	NAMUR / DIN 19234
Encoder supply	8 outputs at 8.2 V DC
Input delay	1.2 to 3 ms for 0→1 and 1→0
Cable length	Up to 200 m shielded; 100 m unshielded
Safety level	SIL 2 single-channel; SIL 3 two-channel; PL e / Category 4
Diagnostics	Diagnostic alarm, readable diagnostics, SF group-error LED and fail-safe-operation indication
Connector and size	1 × 40-pole front connector; 80 × 125 × 120 mm

System Fit and Applications

Safety-related process inputs

Acquire fail-safe NAMUR signals in SIMATIC S7 F-system architectures requiring defined single- or two-channel evaluation.

Hazardous-area sensor circuits

Interface certified Ex(i) NAMUR field signals when the complete loop, certificates and installation rules have been verified.

Legacy S7-300 maintenance

Replace the exact module in installed systems while preserving wiring, safety parameters and validated diagnostic behavior.

Compatibility and Procurement Checks

Exact article number

Confirm 6ES7326-1RF00-0AB0 on the module label; do not substitute 6ES7326-1RF01-0AB0 without engineering review.

Safety configuration

Check the F-system project, single- or two-channel evaluation, proof-test requirements and approved safety documentation.

Wiring and connector

Verify the required 40-pole connector, NAMUR sensor current levels, cable shielding and Ex(i) loop parameters.

Successor planning

The official successor is 6ES7326-1RF01-0AB0; assess hardware, parameterization and certification differences before migration.

Lifecycle Note

Siemens lists 6ES7326-1RF00-0AB0 as PM490: Start of final year of support, with “Product discontinued since: 01.05.2024,” and names 6ES7326-1RF01-0AB0 as successor. This lifecycle wording applies only to the exact article number.

Frequently Asked Questions

What type of module is 6ES7326-1RF00-0AB0?

It is a SIMATIC S7-300 SM 326 fail-safe digital input module with eight NAMUR inputs for S7 F-systems.

How many safety channels can it provide?

It supports eight single-channel inputs or four two-channel input evaluations, depending on the validated safety design.

What supply and connector are required?

The module uses 24 V DC and requires one 40-pole front connector.

Can I order 6ES7326-1RF01-0AB0 as a drop-in replacement?

No automatic equivalence should be assumed. Review hardware, parameterization, safety documentation and approval requirements first.

What should be supplied with a quotation request?

Provide the full article number, current module label, firmware or revision details, F-system project context, quantity and destination.

Request a Verified Quote for 6ES7326-1RF00-0AB0

Send the full article number, required quantity, destination and system context for stock, compatibility and warranty review.

Contact Stockoems for Availability

Service Support for 6ES7326-1RF00-0AB0

Documentation review, sourcing coordination and delivery support for industrial automation procurement.

Verification	Supply Coordination	After-Sales Support
Article number, condition, revision and visible identification are checked against order requirements.	Availability, packing, freight route and dispatch documents are coordinated before shipment.	Warranty terms, arrival inspection records and issue escalation are documented for the supplied unit.

Need Service Support for 6ES7326-1RF00-0AB0?

Share the full part number and application details so our team can prepare the correct service scope.

Recommended Industrial Automation Models

Reference models for broader sourcing discussions around 6ES7326-1RF00-0AB0. These are not direct replacements; verify system, electrical and lifecycle requirements independently.

No.	Model	Brand	Reference area
01	6ES7315-2AH14-0AB0	Siemens	PLC and process control
02	1756-L83E	Allen-Bradley	PLC and process control
03	3BSE018161R1	ABB	PLC and process control
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05	KJ3001X1-BA1	Emerson	PLC and process control
06	AAI141-S00	Yokogawa	PLC and process control
07	3500/15	Bently Nevada	PLC and process control
08	BMXP342020	Schneider Electric	PLC and process control
09	KFD2-STC4-Ex1	Pepperl+Fuchs	PLC and process control
10	IB IL 24 DI 16	Phoenix Contact	PLC and process control
11	CX5130-0125	Beckhoff	PLC and process control
12	IC695CPE310	GE	PLC and process control
13	F8650X	HIMA	PLC and process control
14	FBM201	Foxboro	PLC and process control
15	6ES7134-6GF00-0AA1	Siemens	Industrial I/O
16	1756-IB16	Allen-Bradley	Industrial I/O
17	3BSE020514R1	ABB	Industrial I/O
18	CC-PAOX01	Honeywell	Industrial I/O
19	KJ3222X1-BA1	Emerson	Industrial I/O
20	AAI543-S00	Yokogawa	Industrial I/O
21	3500/22M	Bently Nevada	Industrial I/O
22	BMXDDI1602	Schneider Electric	Industrial I/O
23	KFD2-SR2-Ex2.W	Pepperl+Fuchs	Industrial I/O
24	IB IL 24 DO 16	Phoenix Contact	Industrial I/O
25	EL1008	Beckhoff	Industrial I/O
26	IC695ETM001	GE	Industrial I/O
27	F6217	HIMA	Industrial I/O
28	FBM207	Foxboro	Industrial I/O
29	6GK5208-0BA10-2AA3	Siemens	Industrial communication
30	1756-EN2T	Allen-Bradley	Industrial communication
31	3BSE013252R1	ABB	Industrial communication
32	CC-PDIL01	Honeywell	Industrial communication
33	VE4003S2B1	Emerson	Industrial communication
34	ADV151-P00	Yokogawa	Industrial communication
35	3500/32M	Bently Nevada	Industrial communication
36	BMXDDO1602	Schneider Electric	Industrial communication
37	KCD2-SCD-Ex1	Pepperl+Fuchs	Industrial communication
38	FL SWITCH 1008N	Phoenix Contact	Industrial communication
39	EL2008	Beckhoff	Industrial communication
40	IC694MDL645	GE	Industrial communication
41	F3330	HIMA	Industrial communication
42	FBM217	Foxboro	Industrial communication
43	6AV2124-0MC01-0AX0	Siemens	Operator interface
44	1794-AENTR	Allen-Bradley	Operator interface
45	3BSE041882R1	ABB	Operator interface
46	CC-PCNT01	Honeywell	Operator interface
47	KJ2003X1-BB1	Emerson	Operator interface
48	AFV10D-S41201	Yokogawa	Operator interface
49	3500/42M	Bently Nevada	Operator interface
50	140CPU67160	Schneider Electric	Operator interface
51	NJ2-V3-N	Pepperl+Fuchs	Operator interface
52	QUINT4-PS/1AC/24DC/10	Phoenix Contact	Operator interface
53	EL3064	Beckhoff	Operator interface
54	IS220PAICH1A	GE	Operator interface
55	X-CPU 01	HIMA	Operator interface
56	P0926JM	Foxboro	Operator interface
57	6SL3210-1KE21-7UF1	Siemens	Power and condition monitoring
58	2711P-T10C22D9P	Allen-Bradley	Power and condition monitoring
59	3BSE008538R1	ABB	Power and condition monitoring
60	51304540-100	Honeywell	Power and condition monitoring
61	A6110	Emerson	Power and condition monitoring
62	VI451-10	Yokogawa	Power and condition monitoring
63	3300 XL 8 mm	Bently Nevada	Power and condition monitoring
64	HMIGTO6310	Schneider Electric	Power and condition monitoring
65	NBB5-18GM50-E2	Pepperl+Fuchs	Power and condition monitoring
66	RAD-2400-IFS	Phoenix Contact	Power and condition monitoring
67	EK1100	Beckhoff	Power and condition monitoring
68	IC200ALG264	GE	Power and condition monitoring
69	X-DI 32 01	HIMA	Power and condition monitoring
70	CP40B	Foxboro	Power and condition monitoring