Class1 117155 - TPG Governor - 117684 EXTERNAL - Manual (Page 7)

FORM-ENG-0018 REV A 05-27-03
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TECHNICAL DATA SHEET
PAGE
6 OF 26
DATE 3/28/2012
PRODUCT GROUP THROTTLE CONTROL P/N 117155 REV 1.23
PRODUCT TOTAL PRESSURE GOVERNOR (TPG) BY AMS
Manual P/N 117684
3. Total Pressure Governor Overview
The Total Pressure Governor (TPG) p/n 117155 is an SAE J1939 Controller Area Network (CAN)
device that controls engine speed using data communications directly to the engine ECU or with an
analog control signal. By operating on the J1939 network, the governor is able to monitor engine
RPM and other pertinent data directly from the engine ECU. Engine information is available directly
so that NFPA required instrumentation is delivered through a single unit saving panel space and
delivering engine specific warnings as determined by each engine manufacturer.
Control algorithms are optimized to take advantage of the J1939 CAN data to yield crisp and
accurate control of engine and subsequently pump speed and pressure output.
For engines that may not support the data link control, an analog output signal is available to
provide precise control of the engine speed and pressure.
Figure 4. TPG controls and indicators.