Product information
Overview
Applications
- Fail-safe NAMUR input: Provides fail-safe NAMUR signal input for SIMATIC S7 F-systems.
Key Features
- Fail-safe NAMUR inputs: The SM 326 module has 8 digital inputs for fail-safe NAMUR input operation in SIMATIC S7 F-systems.
- Supply and input signals: Rated supply voltage is 24 V DC. Input current is 0.35 to 1.2 mA for signal "0" and 2.1 to 7 mA typically for signal "1".
- Safety capability: Safety capability is Cat. 4 according to EN 954, PLe according to ISO 13849-1, and SIL 2 single-channel or SIL 3 two-channel according to IEC 61508.
- Diagnostics and protection: The module has parameterizable diagnostic alarms, fail-safe operation indication, a red Group error SF LED, reverse polarity protection, and potential separation between channels.
- Connection and cable length: A 1x 40-pin front connector is required. Maximum cable length is 200 m shielded or 100 m unshielded.
- Ex(i) characteristics: For gas group IIC connecting terminals, maximum values include Uo 10 V, Io 13.9 mA, Po 33.1 mW, Co 3 μF and Lo 80 mH.
Technical Summary
| Product type | Digital input SM 326 module |
|---|---|
| Digital inputs | 8 |
| Rated supply voltage | 24 V DC |
| Input signal type | NAMUR |
| Front connector | 1x 40-pin |
| Safety class | Cat. 4 according to EN 954 |
| Performance level | PLe according to ISO 13849-1 |
| Safety integrity level | SIL 2 (single-channel), SIL 3 (two-channel) according to IEC 61508 |
| Maximum operating ambient temperature | 60 °C |
| Product lifecycle | Product cancellation |
Frequently Asked Questions
What is Siemens 6ES7326-1RF01-0AB0?
It is a SIMATIC S7 digital input SM 326 module with 8 fail-safe NAMUR inputs for SIMATIC S7 F-systems.
What supply voltage does the module use?
The rated supply voltage is 24 V DC.
Which connector is required?
The required front connector is 1x 40-pin.
What safety levels are supported?
It supports Cat. 4 according to EN 954, PLe according to ISO 13849-1, and SIL 2 single-channel or SIL 3 two-channel according to IEC 61508.
