Siemens 6ES7193-6BP20-0BB0 Replacement for ET 200SP

Product Overview

Siemens 6ES7193-6BP20-0BB0 Replacement for ET 200SP: Smooth Transition & Legacy System Upgrade

The Siemens 6ES7193-6BP20-0BB0 is a BaseUnit (BU-Type A0) for the SIMATIC ET 200SP distributed I/O system, designed to accept standard I/O modules with push-in terminal wiring. As industrial facilities phase out aging SIMATIC S7-300 and S7-400 distributed I/O architectures in favor of the ET 200SP platform, this BaseUnit serves as the foundational mounting and terminal interface for each I/O slot in the new rack configuration. TOPNLMS maintains verified stock of the 6ES7193-6BP20-0BB0 to support both emergency replacement and planned migration projects, with same-day dispatch available from our Xiamen warehouse.

When migrating from legacy ET 200M or ET 200S installations, engineers frequently encounter wiring incompatibilities at the field terminal level. The 6ES7193-6BP20-0BB0 resolves this by providing a push-in spring-clamp terminal block that accepts conductors from 0.2 mm² to 1.5 mm² without requiring ferrules, significantly reducing rewiring labor during a cutover. The BaseUnit’s color-coded terminal layout also simplifies documentation updates when replacing older screw-terminal modules such as those found in the ET 200S IM151-1 Standard interface module assemblies.

In PROFINET-based control architectures, the ET 200SP head module — typically an IM 155-6 PN ST (6ES7155-6AU01-0BN0) or IM 155-6 PN HF (6ES7155-6AU00-0BN0) — communicates with the S7-1500 or S7-1200 CPU over a standard PROFINET IO connection. The 6ES7193-6BP20-0BB0 BaseUnit slots directly into the ET 200SP station rail alongside digital input modules such as the DI 8×24VDC ST (6ES7131-6BF01-0BA0), digital output modules such as the DQ 8×24VDC/0.5A ST (6ES7132-6BF01-0BA0), and analog input modules such as the AI 4×U/I 2-wire ST (6ES7134-6GD01-0BA1). Each BaseUnit carries the potential-group and supply-bus connections that allow adjacent modules to share a 24 VDC supply rail without additional wiring, a key advantage when consolidating multiple legacy I/O drops into a single ET 200SP station.

For facilities upgrading from SIMATIC S7-300 with SM 321 or SM 322 I/O cards mounted in a CR3 or UR2 rack, the migration path typically involves replacing the centralized rack with one or more ET 200SP stations distributed closer to the field devices. The 6ES7193-6BP20-0BB0 BaseUnit, combined with the appropriate I/O module, replicates the channel count and signal type of the original SM card while reducing panel space by up to 60%. The push-in terminal design also eliminates the need for the 40-pin front connector (6ES7392-1AM00-0AA0) previously required on S7-300 I/O modules, further simplifying the retrofit.

Communication protocol compatibility is a critical consideration in any migration. The ET 200SP system natively supports PROFINET IO with IRT (Isochronous Real-Time) and RT modes, as well as PROFIBUS DP via the IM 155-5 DP ST (6ES7155-5AA00-0AB0) head module. This means that existing PROFIBUS DP segments — common in older S7-300 and S7-400 installations — can be retained during a phased migration by deploying the DP variant of the ET 200SP head module, while the 6ES7193-6BP20-0BB0 BaseUnits remain identical regardless of the communication protocol used. This hardware commonality simplifies spare-parts inventory management across mixed-protocol sites.

Physical installation space is another frequent constraint in retrofit projects. The ET 200SP station using 6ES7193-6BP20-0BB0 BaseUnits mounts on a standard 35 mm DIN rail and requires only 15 mm of width per I/O module slot, compared to the 40 mm per slot typical of S7-300 SM modules. Control cabinets that previously housed a 16-channel S7-300 rack can often accommodate a full 32-channel ET 200SP station in the same footprint, leaving room for additional power supply modules such as the PM-E 24VDC (6ES7138-4CA01-0AA0) or server module (6ES7193-6PA00-0AA0) required to terminate the station bus.

During commissioning, the 6ES7193-6BP20-0BB0 is configured through TIA Portal V15.1 or later using the standard ET 200SP device library. No additional GSD files are required for PROFINET deployments. For PROFIBUS DP configurations, the GSD file for the IM 155-5 DP head module covers all BaseUnit and I/O module combinations. Existing S7-300 programs can be migrated using the TIA Portal Migration Tool, which maps SM 321/322/331/332 channel addresses to the equivalent ET 200SP I/O module addresses, minimizing manual program editing and reducing the risk of commissioning errors.

Compatibility Comparison Table

Seamless Upgrade Solutions

A complete ET 200SP migration project typically requires several complementary components alongside the 6ES7193-6BP20-0BB0 BaseUnit. The IM 155-6 PN ST head module provides the PROFINET IO interface for the entire station and is the first component to specify when designing a new ET 200SP drop. Digital I/O modules such as the DI 8×24VDC ST and DQ 8×24VDC/0.5A ST slot directly onto the BaseUnit and replicate the channel functions of legacy SM 321 and SM 322 cards. For analog signal migration from SM 331 or SM 332 modules, the AI 4×U/I 2-wire ST and AQ 4×U/I ST modules provide equivalent functionality with improved resolution. The PM-E 24VDC power module supplies the load voltage for output modules within a potential group, while the server module (6ES7193-6PA00-0AA0) terminates the station bus at the right end of the ET 200SP assembly. For sites retaining a PROFIBUS DP backbone during a phased cutover, the IM 155-5 DP ST head module allows the same 6ES7193-6BP20-0BB0 BaseUnits to operate on the existing DP segment without any hardware modification. Where signal isolation is required between field devices and the control system — common in high-voltage or chemically aggressive environments — DIN-rail-mounted signal isolators can be installed upstream of the ET 200SP station terminals. Finally, a SIMATIC programming cable (USB-MPI/DP adapter) or standard Ethernet patch cable completes the commissioning toolkit for TIA Portal-based startup and diagnostics.

Retrofit Guidance FAQ

Q: Can I reuse existing field wiring when replacing ET 200S modules with ET 200SP using the 6ES7193-6BP20-0BB0?
A: In most cases, yes. The push-in terminals accept the same conductor cross-sections used with ET 200S screw terminals. Verify conductor end preparation — push-in terminals do not require ferrules for solid or fine-stranded wire, but ferrules are recommended for ultra-fine-stranded cables.

Q: Do I need to modify my S7-300 program when migrating I/O to ET 200SP?
A: The TIA Portal Migration Tool automates address remapping from S7-300 SM channel addresses to ET 200SP I/O module addresses. Manual review of interrupt OBs and diagnostic routines is recommended, but the core process image typically migrates without manual editing.

Q: Is PROFIBUS DP communication retained during a phased migration?
A: Yes. By selecting the IM 155-5 DP ST head module, the ET 200SP station operates as a standard PROFIBUS DP slave, fully compatible with existing S7-300 or S7-400 DP masters. The 6ES7193-6BP20-0BB0 BaseUnits are protocol-agnostic and function identically in both PROFINET and PROFIBUS configurations.

Q: How much DIN rail space does an ET 200SP station require compared to a legacy ET 200S station?
A: ET 200SP I/O modules with 6ES7193-6BP20-0BB0 BaseUnits occupy approximately 15 mm per slot. A 16-channel ET 200S station typically requires 8 × 30 mm = 240 mm plus the interface module. An equivalent ET 200SP station requires approximately 16 × 15 mm = 240 mm plus the head module — similar total width but with double the channel density per slot available through high-feature I/O modules.

Q: What diagnostic capabilities does the 6ES7193-6BP20-0BB0 support?
A: The BaseUnit itself is passive and does not generate diagnostics. Diagnostic information is provided by the I/O module seated on the BaseUnit and reported to the head module via the station bus. Channel-level diagnostics, short-circuit detection, and wire-break detection depend on the specific I/O module selected.

Warranty Assurance

Every 6ES7193-6BP20-0BB0 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to dispatch, each unit undergoes functional verification including terminal integrity inspection, module bus connector check, and visual inspection against Siemens factory quality standards. In the event of a confirmed defect within the warranty period, TOPNLMS will arrange a replacement unit with priority shipping at no additional cost. Our technical support team responds to after-sales inquiries within one business day, providing commissioning guidance, compatibility confirmation, and documentation support. For urgent plant-down situations, expedited dispatch is available with same-day processing for orders confirmed before 15:00 CST.

Stock is maintained in our Xiamen warehouse and is available for immediate shipment to mainland China, Hong Kong, Southeast Asia, the Middle East, and Europe. All units are shipped in original or equivalent protective packaging with full traceability documentation available on request.

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