The Siemens 6ES7151-8FB01-0AB0 is an IM151-8F PN/DP fail-safe CPU interface module for the SIMATIC ET 200S distributed I/O system. It integrates a 256 KB work memory fail-safe CPU directly into the interface module, enabling it to function as a safety-oriented stand-alone controller within a distributed I/O station.
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6ES7151-8FB01-0AB0Order(MOQ) :
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2kg| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Model | 6ES7151-8FB01-0AB0 |
| Product Family | SIMATIC DP / ET 200S |
| Product Type | IM151-8F PN/DP Fail-Safe CPU Interface Module |
| Work Memory | 256 KB (integrated, not expandable) |
| Retentive Memory | 64 KB for retentive data blocks |
| Load Memory | SIMATIC Micro Memory Card (MMC), max. 8 MB (required for operation) |
| Data Retention | Ensured by SIMATIC MMC (maintenance-free), min. 10 years |
| Processing Times | Bit: 0.06 µs; Word: 0.12 µs; Fixed-point: 0.16 µs; Floating-point: 0.59 µs |
| Safety Certification | SIL 3 (IEC 61508), PL e (ISO 13849-1), Category 4 (EN 954-1) |
| Integrated Interface | PROFINET (3 x RJ45 ports, internal switch) |
| PROFINET IO Controller | Up to 128 IO devices; RT and IRT supported |
| PROFIBUS DP | Requires optional DP Master Module (6ES7138-4HA00-0AB0); up to 32 DP slaves |
| Max. I/O Modules | 63 ET 200S modules per station |
| Max. I/O Address Area | 2,048 bytes inputs / 2,048 bytes outputs |
| Supply Voltage | 24 V DC (20.4 – 28.8 V) |
| Current Consumption | Typ. 352 mA (426 mA with DP master module) |
| Power Loss | Typ. 5.5 W |
| Dimensions (W x H x D) | 120 x 119.5 x 75 mm |
| Weight | Approx. 320 g (net 0.40 kg) |
| Engineering Software | STEP 7 V5.5 or higher + Distributed Safety V5.4 SP4; TIA Portal V11 or higher |
| Firmware Version | V3.2 |
| Lifecycle Status | Phase Out Started – spare part only |
| Model | Description | Typical Application |
|---|---|---|
| 6ES7151-8FB01-0AB0 (this model) | IM151-8F PN/DP fail-safe CPU, 256 KB, SIL3/PLe | Safety-related control in ET 200S station |
| 6ES7151-8FB00-0AB0 | Predecessor IM151-8F CPU, 192 KB work memory | Legacy replacement (8FB01 is the successor) |
| 6ES7151-8AB01-0AB0 | IM151-8 PN/DP standard CPU, 192 KB | Non-safety PROFINET-based ET 200S stations |
| 6ES7151-7FA21-0AB0 | IM151-7 F-CPU (fail-safe), 192 KB | Legacy PROFIBUS-based safety applications |
| 6ES7138-4HA00-0AB0 | DP Master Module (optional add-on) | Enables IM151-8F CPU to act as PROFIBUS DP Master |
| 6ES7953-8LJxx-0AA0 | SIMATIC Micro Memory Card (MMC) | Required for CPU operation (various capacities) |
Q1: Can the 6ES7151-8FB01-0AB0 function as a stand-alone safety PLC?
Yes. The IM151-8F PN/DP CPU is an intelligent fail-safe pre-processor that can execute safety-related control tasks independently. It can be used as a stand-alone safety CPU within an ET 200S station, certified up to SIL 3 / PL e, enabling machine-level safety control to be distributed rather than centralized.
Q2: Does this module require an MMC card to operate?
Yes. The IM151-8F PN/DP CPU only operates when a SIMATIC Micro Memory Card (MMC) is inserted. The MMC serves as the load memory and provides maintenance-free data retention (minimum 10 years). Maximum MMC capacity is 8 MB.
Q3: What safety functions does this module support?
The module supports safety functions up to SIL 3 (IEC 61508) and PL e (ISO 13849-1). It is designed for use with PROFIsafe protocol, enabling direct connection of emergency stop buttons, safety doors, light curtains, and other safety sensors. The F-CPU can process both standard and fail-safe programs simultaneously.
Q4: Can the IM151-8F CPU be used as a PROFIBUS DP Master?
Yes, with an optional add-on. By inserting the DP Master Module (6ES7138-4HA00-0AB0), the IM151-8F CPU can be extended to function as a PROFIBUS DP Master. It supports up to 32 DP devices and provides SYNC/FREEZE and equidistance capabilities.
Q5: What software is required for programming this fail-safe CPU?
The module requires STEP 7 V5.5 or higher combined with Distributed Safety V5.4 SP4 for classic programming, or STEP 7 TIA Portal V11 or higher for TIA-based engineering. The F-program is compiled separately and generates the F-shared DB required for PROFIsafe communication.
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