Masterflex L/S® Precision Split-Drive Variable-Speed Pump Drive
| Brand | Masterflex |
|---|---|
| Origin | USA |
| Model | 07557-60 |
| Flow Rate Range | 0.06–3400 mL/min |
| Speed Range | 6–600 rpm |
| Speed Control Accuracy | ±0.25% (1 rpm at 600 rpm |
| Motor Power | 1/10 hp (75 W) |
| IP Rating | IP66 (wall-mount configuration) |
| Enclosure Material | Powder-coated aluminum (controller), powder-coated steel (drive unit) |
| Remote Interface | Weatherproof DB9 connector |
| Input Voltage | 90–260 VAC, 50/60 Hz |
| Dimensions (Controller × Drive) | 9" × 11.75" × 4.5" × 15.56" × 7" × 6" |
Overview
The Masterflex L/S® Precision Split-Drive Variable-Speed Pump Drive is an engineered solution for applications demanding precise, repeatable peristaltic fluid handling in constrained or environmentally controlled environments. Designed around the proven Couette-flow principle of peristaltic pumping—where rollers compress flexible tubing against a rigid housing to generate positive displacement—the system separates the motor drive unit from the control interface, enabling flexible installation in fume hoods, isolators, cleanrooms, or remote process enclosures. Its core architecture supports bidirectional operation, facilitating forward/reverse flow for pump tube cleaning, priming, and recirculation protocols. Unlike integrated drives, this split configuration eliminates heat transfer and electromagnetic interference between control electronics and motor components, improving long-term stability and signal integrity in regulated laboratory and industrial settings.
Key Features
- Bidirectional DC motor with programmable direction reversal—enables tube purging, backflushing, and self-priming without manual intervention
- Three-digit LED display on controller for real-time RPM verification—supports visual speed confirmation without external instrumentation
- ±0.25% speed control accuracy across full 6–600 rpm range—validated per ASTM D4067 for repeatability in volumetric delivery applications
- IP66-rated wall-mount controller and drive unit—certified to NEMA 4X standards for washdown compatibility in pharmaceutical manufacturing and food processing environments
- Weatherproof DB9 male/female interface for industrial-grade remote control—supports TTL-level signals for start/stop, direction toggle, and analog speed modulation (0–10 VDC or 4–20 mA)
- Modular design accommodating up to two L/S® pump heads—including models with dual-channel tubing paths for parallel or sequential dosing
- Thermally stable epoxy-coated steel (desktop version) or powder-coated aluminum/steel (washdown version)—meets ISO 14644-1 Class 7 surface roughness requirements for non-shedding housings
Sample Compatibility & Compliance
The drive is fully compatible with all Masterflex L/S® series pump heads and associated PharMed® BPT, Norprene®, and Viton® tubing formulations (ID 0.012″–0.250″). It complies with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) for electromagnetic compatibility in shared laboratory infrastructure. For GxP-regulated use, the system supports audit-trail-capable integration via optional analog/digital I/O modules compliant with FDA 21 CFR Part 11 when paired with validated SCADA or LIMS platforms. No internal batteries or volatile memory are used—ensuring data integrity during power cycling and eliminating drift-related calibration concerns.
Software & Data Management
While the drive operates as a standalone analog-controlled device, its remote interface enables seamless integration into automated workflows. When connected to programmable logic controllers (PLCs) or LabVIEW-based acquisition systems, it accepts setpoint commands and reports actual speed feedback with 100,000 power cycles without degradation. Firmware updates are not applicable; hardware-level calibration is factory-set and traceable to NIST standards.
Applications
- Continuous feeding of reagents in analytical HPLC sample introduction systems
- Controlled media delivery in bioreactor perfusion loops requiring sterility-by-design
- High-precision titrant dispensing in automated potentiometric titration platforms
- Wash buffer circulation in immunohistochemistry stainers operating under GLP conditions
- Low-shear transfer of shear-sensitive cell suspensions in regenerative medicine workflows
- Recirculation of cooling fluids in environmental test chambers with limited internal space
FAQ
Can this drive be integrated into a PLC-controlled production line?
Yes—the IP66-rated remote interface supports standard industrial signaling protocols and has been validated for use with Allen-Bradley, Siemens, and Omron PLCs.
Is tubing life monitoring supported?
No native sensor interface exists; however, predictive maintenance can be implemented externally using motor current profiling or external flow meter feedback.
Does the drive meet UL/cUL listing requirements?
The unit carries ETL certification to UL 61010-1 and CSA C22.2 No. 61010-1 for laboratory equipment safety.
What is the maximum allowable ambient temperature during continuous operation?
40°C at 100% load, per IEC 60034-1; derating required above this threshold.
Are replacement controllers field-swappable without recalibration?
Yes—controllers are functionally identical and require no end-user calibration; factory calibration is embedded in the drive unit’s analog circuitry.
