0151AAD2B31A is a Brooks Instrument 0151i configured flow-computer / secondary-electronics identifier observed in stored auction records. Brooks official legacy documentation identifies Models 0151E and 0151i as flow computers used with mass flow meters, mass flow controllers, and pressure controllers; the 0151i variant is the current-signal version with +24 Vdc instrument supply context, current command and flow-signal handling, front-panel rate/total/setpoint functions, valve override, and optional communications. Because no verified official PDF naming the full 0151AAD2B31A configured part number is currently available, configuration details such as mounting, mains setup, installed serial option, wiring, calibration, and connected flow device must be verified from the physical unit and the Brooks manual
Configurations vary. Verify the exact unit before choosing a replacement.
Displays flow rate and resettable total, supports setpoint control, and provides valve override support for connected mass flow equipment
Signals
0151i signal context
Brooks manual describes Model 0151i as providing +24 Vdc supply, accepting 4-20 mA or 0-20 mA flow signal, and using selectable 0-20 mA / 4-20 mA setpoint signal
Flow output
Model 0151i manual section describes isolated 0-20 mA or 4-20 mA retransmission of the mass-flow signal when properly wired and configured
Controls
Front-panel controls
RATE, TOTAL, SETPOINT, and VALVE / PROGRAM keys
Communications
Communications option
Brooks 0151 family documentation describes optional RS232 and RS422/485 communications for computer or printer interfacing; installed option must be verified on the unit
Installation
Mounting and power boundary
Brooks documentation includes panel-mount and table-top formats and AC mains setup ranges; the exact physical format and mains-voltage switch setting must be checked before use
Compatibility
Connected-device boundary
Connected mass flow meter/controller model, calibration, wiring, remote setpoint, valve override behavior, and alarm/relay use must be verified from the physical unit and installation wiring
Applications
Application domain
Readout, setpoint, totalizing, valve override, and secondary-electronics support for Brooks mass flow instrumentation
Documents
Hosted official documentation
Brooks 0151 Secondary Electronics Installation Manual is hosted locally for download
