Description
Manufacturer: TEWS Technologies GmbH Part Number: TPMC917-10R This is a single-width 32-bit PMC (PCI Mezzanine Card) mezzanine module compliant with IEEE P1386.1 and PCI 2.1 standards. It combines 4 MB battery-backed NV-SRAM and four ESD-protected RS232 serial ports, designed for rugged embedded VME / SBC platforms such as Emerson MVME series single board computers. It provides persistent non-volatile data storage and multi-channel serial communication for real-time industrial control, turbine control and legacy DCS spare applications.
Technical Specifications
| Item | Parameter |
|---|---|
| Form Factor | Single-width 32-bit PMC |
| Memory | 4 MB SRAM with onboard lithium battery backup (NV-SRAM) |
| Serial Ports | 4 × asynchronous RS232 channels |
| FIFO Buffer | 64-byte TX / 64-byte RX per serial channel |
| Baud Rate | Programmable up to 115.2 kbaud |
| Front Panel Connector | DB25 female for serial breakout |
| Bus Interface | PCI 2.1, 3.3 V / 5 V signaling compatible |
| Operating Temperature | 0°C ~ +70°C |
| Storage Temperature | -40°C ~ +85°C |
| Humidity | 5%–95% non-condensing |
| Dimensions | 149 mm × 74 mm |
| MTBF | 346,000 ~ 560,000 hours (MIL-HDBK-217F / EN2) |
Key Features
- Non-volatile battery-backed SRAM preserves critical control data after power loss
- Four independent RS232 channels with ESD protection for noisy industrial cabinets
- Per-port hardware FIFO buffers reduce CPU interrupt load for high-speed serial communication
- Onboard replaceable lithium cell for memory backup; DIP switch configurable battery control
- Compact PMC mezzanine form factor for direct stacking onto VME single-board computers
- Hardware self-test on power-up for memory and serial channel diagnostics
- Rugged PCB construction with EMC filtering for power generation and heavy industry control racks
- Legacy spare module, widely used for retrofitting and maintenance of VME-based control systems
Application Scenarios
- VME embedded real-time control systems paired with Emerson MVME SBCs
- Gas / steam turbine control and protection systems
- Power plant DCS, generator control panels
- Industrial embedded data logging and serial gateway applications
- Legacy VME platform spare replacement and system retrofit
Installation & Maintenance Notes
- Handle module with ESD wrist strap; static discharge can damage SRAM and serial transceivers.
- Power down the host SBC / VME rack before installing or removing the PMC mezzanine card.
- Check onboard lithium battery health periodically; replace battery before end of service life to avoid data loss.
- Use shielded serial cables for RS232 wiring and separate from high voltage power cables to reduce EMI.
- Verify firmware compatibility with host VME single board computer before commissioning.
- Perform BIST test after replacement to validate memory and all four serial channels.
FAQ
Q: What is the main function of TPMC917-10R? A: It provides 4MB battery-backed non-volatile SRAM plus four RS232 serial ports as a PMC mezzanine card for VME embedded controllers.
Q: Can this module be hot-swapped? A: No. Host VME rack power must be fully removed before insertion or extraction.
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