Edwards B736-01-000 EXT250 4022.436.8226 TAB22Q-5/PURF3-R 2L

Product Details

B736-01-000 EXT250 4022.436.8226 TAB22Q-5/PURF3-R 2L81-050097-52 Product Description

The Edwards B736-01-000 EXT250 turbomolecular pump module is engineered to function as the high-vacuum backbone of a multi-layer process control architecture. Rather than operating as a standalone component, the EXT250 achieves its full performance potential when deployed within a coordinated system that spans the control layer, power layer, communication layer, and process monitoring layer.

At the control layer, the EXT250 interfaces directly with the Edwards EXC300 or EXC350 turbomolecular pump controller, which provides closed-loop speed regulation, soft-start sequencing, and real-time fault diagnostics. The EXC controller communicates pump status — including rotor speed, bearing temperature, and power draw — to the supervisory PLC or SCADA system via RS-232 or RS-485 serial links. In installations where Profibus DP or Modbus RTU integration is required, the Edwards TIC (Turbo and Instrument Controller) serves as the protocol gateway, enabling the EXT250 to participate natively in a Siemens S7-300/S7-400 or Allen-Bradley ControlLogix automation backbone.

At the power layer, the EXT250 requires a stable 24 VDC supply delivered through the EXC controller. System designers typically source this from a Siemens SITOP PSU8200 or Phoenix Contact QUINT-PS DIN-rail power supply, both of which provide the regulated, low-ripple DC output necessary to protect the pump's high-speed bearing electronics. Redundant power architectures — using dual-channel SITOP UPS modules — are recommended for continuous-process applications in semiconductor, analytical instrumentation, or thin-film deposition environments.

At the I/O and signal layer, the EXT250's interlock and status signals are wired to the PLC's digital I/O modules. In Siemens TIA Portal environments, the ET 200SP distributed I/O system with BaseUnit BU15-P16+A10+2D modules provides a compact, DIN-rail-mounted interface for pump run/stop commands, fault relay outputs, and speed-reached confirmation signals. For installations requiring galvanic isolation between the pump controller and the PLC I/O bus, Phoenix Contact MCR-SL signal isolators or Weidmüller ACT20P signal conditioners are recommended to eliminate ground loop interference in high-vacuum process environments.

At the communication and network layer, the EXT250 system integrates with plant-level SCADA via OPC-UA or Modbus TCP gateways. The Anybus X-gateway AB7007 (Profibus DP to Modbus TCP) or HMS Ewon Flexy industrial router enables remote monitoring of pump parameters — rotor speed, bearing temperature, power consumption, and fault codes — from a centralized DCS or MES platform. This connectivity is essential for predictive maintenance programs and ISO 55000-aligned asset management strategies.

At the HMI layer, operators interact with the EXT250 system through a Siemens SIMATIC HMI KTP700 Basic or Weintek MT8071iE touch panel, configured to display real-time pump status, process pressure readings from a Pfeiffer Vacuum PKR 251 full-range gauge, and alarm history. The HMI screen layout typically includes a vacuum system P&ID mimic, trend graphs for rotor speed and chamber pressure, and one-touch pump start/vent sequences.

At the protection and safety layer, the EXT250 architecture incorporates Pilz PNOZ safety relays or Siemens SIRIUS 3SK1 safety relay modules to enforce interlock logic — preventing pump start if the backing pump (e.g., Edwards nXDS10i scroll pump) has not reached its operating pressure threshold, and triggering controlled shutdown sequences on over-temperature or power failure events. This layered protection approach ensures compliance with IEC 61511 functional safety requirements in process industry deployments.

The Edwards B736-01-000 EXT250 turbomolecular pump module serves a broad range of high-vacuum process applications across multiple industrial verticals:

Semiconductor and Thin-Film Manufacturing: The EXT250 is widely deployed in PVD (physical vapor deposition), CVD (chemical vapor deposition), and ion implantation systems, where sustained high-vacuum levels below 10⁻⁷ mbar are required for process repeatability and film quality. Its oil-free bearing design eliminates hydrocarbon contamination risk in cleanroom environments.

Analytical Instrumentation: Mass spectrometers, electron microscopes (SEM/TEM), and surface analysis systems (XPS, AES) rely on the EXT250's ultra-low ultimate pressure and vibration-damped rotor design to maintain the stable vacuum environment required for accurate measurement. The pump's compact form factor and any-orientation mounting capability simplify integration into space-constrained instrument enclosures.

Pharmaceutical and Freeze-Drying: In lyophilization (freeze-drying) systems for pharmaceutical manufacturing, the EXT250 supports the high-vacuum stages of the drying cycle, working in tandem with roots blower and rotary vane backing pump combinations to achieve the deep vacuum levels required for sublimation. Its RS-485 communication interface enables full integration with batch control systems compliant with FDA 21 CFR Part 11.

Research and University Laboratories: Surface physics, plasma physics, and materials science laboratories deploy the EXT250 in custom vacuum chambers for experiments requiring ultra-high vacuum (UHV) conditions. The pump's compatibility with Edwards TIC controllers and standard CF/ISO-K flange interfaces simplifies integration with existing laboratory vacuum infrastructure.

Power and Energy: High-voltage switchgear testing, particle accelerator beam line systems, and vacuum interrupter manufacturing all require the sustained high-vacuum performance that the EXT250 delivers. Its robust bearing design and extended service intervals reduce maintenance downtime in 24/7 operational environments.

Q1: Is the Edwards B736-01-000 EXT250 compatible with Siemens S7-1500 PLC systems, and what communication interface is required? Yes. The EXT250, when paired with an Edwards EXC300/EXC350 controller or TIC unit, communicates via RS-232 or RS-485 serial. For direct integration with a Siemens S7-1500 PLC, a Profibus DP or Modbus RTU/TCP gateway (such as the Anybus X-gateway or HMS Ewon Flexy) is required to bridge the serial protocol to the PLC's communication bus. Alternatively, the Edwards TIC controller supports direct Profibus DP connectivity, enabling native integration into TIA Portal-based automation architectures without additional gateway hardware.

Q2: What backing pump is recommended for the EXT250 in a continuous-process application, and how is the interlock sequence configured? Edwards recommends the nXDS10i or nXDS15i scroll pump as the primary backing pump for the EXT250 in oil-free, continuous-process applications. The interlock sequence — ensuring the backing pump reaches its operating pressure before the turbomolecular pump is started — is configured in the EXC controller's parameter menu or via the TIC's interlock relay outputs. In PLC-controlled systems, this interlock logic is typically implemented in the safety relay layer (Pilz PNOZ or Siemens SIRIUS 3SK1) and mirrored in the PLC program for supervisory monitoring. NANKMOS provides pre-configured interlock wiring diagrams for EXT250 + nXDS backing pump combinations upon request.

Q3: What does the 12-Month Warranty cover, and what is NANKMOS's lead time and shipping process for the B736-01-000? The NANKMOS 12-Month Warranty covers manufacturing defects, bearing failure under normal operating conditions, and controller communication faults attributable to the pump module itself. Warranty claims are processed within 5 business days of fault confirmation, with replacement or repair options available. For the B736-01-000 EXT250, NANKMOS maintains stock for priority orders, with standard lead times of 3–7 business days for in-stock units and 2–4 weeks for sourced units. All units undergo pre-shipment functional testing — including rotor spin-up verification, bearing temperature monitoring, and serial communication handshake confirmation — before dispatch. Global shipping is available via DHL Express, FedEx International Priority, and sea freight for bulk orders.