MOLEX SST-PB3-REM – PROFIBUS DP Remote I/O Module | SST-PB3 Series Platform
Engineering Background
The SST-PB3-REM is a PROFIBUS DP remote I/O expansion module developed under the SST (Smart System Technology) platform, originally engineered by Woodhead Industries and now maintained under the MOLEX brand following acquisition. Designed for distributed I/O architectures in industrial automation, this module enables engineers to extend field-level I/O capacity across PROFIBUS DP networks without adding complexity to the central control cabinet.
Product Positioning
The SST-PB3-REM targets process and discrete manufacturing environments where remote I/O nodes must operate reliably under harsh electrical and environmental conditions. It is the preferred expansion module for system integrators building PROFIBUS DP networks with SST-PB3 master interfaces, offering seamless plug-and-play compatibility within the SST-PB3 ecosystem. Procurement engineers sourcing replacement or expansion units will find this module fully interchangeable with existing SST-PB3 installations.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | SST-PB3-REM |
| Manufacturer | MOLEX (formerly Woodhead / SST) |
| Series / Platform | SST-PB3 |
| Module Type | PROFIBUS DP Remote I/O Expansion Module |
| Fieldbus Protocol | PROFIBUS DP (EN 50170 / IEC 61158) |
| Baud Rate Support | 9.6 kbps – 12 Mbps (auto-detect) |
| PROFIBUS Address Range | 0 – 125 (configurable) |
| I/O Expansion | Remote I/O node for SST-PB3 master |
| Supply Voltage | 24 VDC (nominal), ±10% |
| Power Consumption | Refer to datasheet (typical <5 W) |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -25°C to +85°C |
| Relative Humidity | 5% – 95% non-condensing |
| Protection Rating | IP20 (panel-mount) |
| Mounting | DIN rail (EN 60715 TS35) |
| Weight | 268 g |
| Certifications | CE, UL (verify current listing) |
| Connector Interface | PROFIBUS DB9 / terminal block (per unit configuration) |
Proven Application Environments
- Automotive Assembly Lines — Distributed I/O nodes on PROFIBUS DP networks controlling welding, painting, and conveyor systems.
- Chemical & Petrochemical Plants — Remote I/O expansion in hazardous-area-adjacent control panels with PROFIBUS DP backbone.
- Water & Wastewater Treatment — Field-level sensor/actuator interfacing across geographically distributed pump stations.
- Food & Beverage Processing — Hygienic-zone remote I/O where cabinet space is constrained and field wiring must be minimized.
- Building Automation & HVAC — Integration of PROFIBUS DP remote nodes into BMS architectures for HVAC and energy management.
- Machine Tool & Packaging OEM — Modular machine designs requiring scalable I/O expansion without PLC hardware changes.
Engineering Advantages
- Seamless SST-PB3 Ecosystem Compatibility — Designed as a native expansion module; no additional configuration software or gateway required.
- Auto Baud Rate Detection — Eliminates manual baud rate configuration, reducing commissioning time on multi-speed PROFIBUS segments.
- DIN Rail Mounting — Standard TS35 rail mounting ensures rapid panel integration and secure mechanical retention.
- Wide Operating Temperature Range — Suitable for both climate-controlled control rooms and industrial floor-level enclosures.
- Compact Form Factor — Minimizes panel real estate while maximizing I/O density per rack unit.
- Proven MOLEX/SST Reliability — Backed by decades of fieldbus hardware engineering heritage across global industrial installations.
System Architecture & Signal Flow
In a typical SST-PB3 deployment, the SST-PB3 master interface card (installed in the host PLC or PC) acts as the PROFIBUS DP Class 1 master. The SST-PB3-REM module connects as a PROFIBUS DP slave node on the same segment, extending the I/O capacity of the network. Field signals (digital inputs/outputs, analog signals via I/O sub-modules) are wired directly to the remote module’s terminal blocks. The PROFIBUS DP protocol handles cyclic data exchange between the master and all slave nodes at the configured baud rate. Termination resistors must be correctly applied at both ends of the PROFIBUS segment to ensure signal integrity at baud rates above 1.5 Mbps.
Sourcing & Quality Verification
- Genuine MOLEX Origin — All units sourced through authorized industrial distribution channels or verified surplus with full traceability documentation.
- Pre-shipment Inspection — Each unit undergoes visual inspection for label integrity, connector condition, and housing damage before dispatch.
- Serialization & Lot Traceability — Date codes and lot numbers recorded for quality audit compliance.
- Packaging — Shipped in anti-static ESD-safe packaging with foam cushioning to prevent transit damage.
- Documentation Available — Datasheet, wiring diagram, and GSD file available upon request for engineering review.
Procurement Process
- Step 1 — Inquiry: Contact us via support@konmask.com or +0086 19859288691 with your required quantity and delivery timeline.
- Step 2 — Quotation: Receive a formal quotation with unit price, lead time, and shipping options within 1 business day.
- Step 3 — Order Confirmation: Submit purchase order or place order directly on Konmask.com.
- Step 4 — Quality Check & Dispatch: Unit inspected, packed, and dispatched with tracking number provided.
- Step 5 — After-Sales Support: Technical support available for installation, GSD file configuration, and PROFIBUS network commissioning.
Technical FAQ
Q: Is the SST-PB3-REM compatible with third-party PROFIBUS DP masters?
A: The module is designed as a native expansion for the SST-PB3 master platform. Compatibility with third-party PROFIBUS DP masters depends on GSD file support — contact us for the GSD file and compatibility confirmation.
Q: What is the maximum number of SST-PB3-REM modules per PROFIBUS segment?
A: PROFIBUS DP supports up to 126 nodes per segment (addresses 0–125). Practical limits depend on the master’s I/O data buffer size and cycle time requirements.
Q: Can this module operate in a PROFIBUS PA network?
A: No. The SST-PB3-REM is designed for PROFIBUS DP only. PROFIBUS PA requires a DP/PA coupler or link device.
Q: Is a GSD file available for integration into Siemens TIA Portal or Step 7?
A: Yes. The GSD file for the SST-PB3-REM is available upon request. Contact support@konmask.com.
Q: What is the warranty and return policy?
A: All units carry a 90-day functional warranty. DOA (Dead on Arrival) units are replaced at no charge. Contact us within 7 days of receipt for any quality issues.
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Contact: support@konmask.com | +0086 19859288691
