SLA7840: Compact Digital Metal Seal, RT0 pages

Data Sheet
DS-PR-SLA7800-RT-eng
August, 2009

Model SLA7840

Brooks® Model SLA7840 Remote Transducer
Pressure/Flow Controller
General Features:
• 1-1/8" Mechanical Platform
• High Performance Co-Planar Valve
• All wetted parts 32 Ra maximum to maintain
particle, moisture and contamination free
process conditions
• All-Metal seals, High leak integrity
(less than 1x10-10 atm-cc/sec He)
• Flow accuracy ±1% of rate (or setpoint), including
linearity to assure device is controlling
precisely at desired level
• Digital Communication options offer easy
commissioning and reduced system wiring
• Device can store 10 selectable calibrations and
flow ranges
• CE Compliant
Analog I/O:
• 15-pin
• 0-5 Volt setpoint and flow signals
• Single sided +15 Volt DC power supply
• Separate ‘valve-override’ signal
• Compatible with Brooks' Model 0254
secondary electronics

DeviceNetTM Communication Option:
• Easy commissioning and reduced
system wiring
• Accessibility of sensor, valve, calibration,
tuning, diagnostic, and other internal data,
to support fast commissioning and
streamlining of controller insitu preventive
maintenance
• MAC-ID, baud rate rotary switches, and
two bi-color status LEDs - to ease setup and
addressing as well as status confirmation
• Vendor Specific Profile, ODVA certified
• Capabilities: Poll I/O, Cyclic, Change-of-State
and explicit messaging

Model SLA7840D
Digital I/O DeviceNetTM

Model SLA7840A
Analog I/O

Description
Brooks Instrument’s Model SLA7840 is a 1-1/8" wide
profile high purity metal sealed instrument that controls
pressure while measuring flow rate. The Model SLA7840
receives a remote pressure transducer signal, and using
adjustable integral PID control electronics and a control
valve, maintains a desired set pressure. In addition to
the pressure function, the Model SLA7840 provides a
0-5 V signal that is linear with mass flow rate. The Model
SLA7840 can also be configured as a mass flow controller
for calibration or test purposes.
Superior Valve Technology
The co-planar valve offers unmatched performance.
Due to its simplified construction, the valve exhibits
superior repeatability, stability, and response time.
Instruments are less sensitive to pressure variations in
the process because of the larger valve control range.
The co-planar valve also offers lower leak-by rates
compared to other metal sealed controllers. These
advancements ensure a more stable process over
time.

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