Brooks Instrument SLA5800 Series - Manual (Page 38)

3-6
Brooks ® Digital MFC's & MFM's
Section 3 Operation
Installation and Operation Manual
X-TMF-SLA5800-MFC-eng
Part Number: 541B027AAG
April, 2013
5 Vdc Reference
Connector Pin 11 on the 15 pin D-Connector provides a 5 Vdc reference
output signal and is for use in generating a setpoint and/or Valve Override
Signal. The current drive capability of this output is limited to 2.5 mA
maximum and must be used with care.
3-5 Communications Features
3-5-1 RS-485 Communications Features (Analog versions only)
Digital communication, designed to emulate the Brooks S-series
"S-protocol" or pseudo-HART communications is available on the Brooks
Digital Series via RS-485. This form of multi-drop capable communication
provides access to many of the Brooks Digital Series functions for "control
and monitor" operations, including:
• Accurate setpoint adjustment flow output measurement
(including units of measure selection)
• Valve Override (controller only)
• Flow Totalizer
• Alarm status and settings
• Soft Start Control (controller only)
RS-485 equipped units support the following baud rates. Please specify the
desired baud rate when ordering (default is 19200 baud). Alternately, baud
rate may be changed using the Brooks Service Suite
TM .
Baud Rates: 1200, 2400, 4800, 9600, 19200 and 38400
Reference the Brooks document "S-protocol Communication Command
Description for Smart II" for more detail regarding the capabilities of this
communication interface.