Ampcontrol Pty Ltd
– ABN 28 000 915 542
DIESELGUARD USER MANUAL
MAG-179 Version 3
– APR/16
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 18 of 27
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4.4.2 RUN/Start Input (Terminal Block 2: RUN)
When the RUN input is shorted to 0V, the Diesel Machine Monitor will wake up. This can be
accomplished via the connection of either a normally open momentary “Start” pushbutton in the control
enclosure, or via a pressure operated switch in the main pneumatic line.
Some machines have a two stage safety pressure loop and this function could also be derived from a
pressure switch mounted in the primary pressure circuit
. When the machine’s pneumatic lines are
pressurised, the switch will close and the Diesel Machine Monitor will wake up.
4.4.3 Alarm Reset (Terminal Block 2: Alarm Reset)
When the Alarm Reset input is shorted to 0V, the Diesel Machine Monitor will clear any latched trips
(provided that the system is healthy). This can be accomplished via the connection of either a normally
open momentary “Reset” pushbutton or a selector switch with a momentary “Reset” position. This
operator is normally installed in the control enclosure.
4.4.4 Deputy Override (Terminal Block 2: Deputy)
Whilst the Deputy Override input is shorted to 0V, the Diesel Machine Monitor will override any current
alarm states and allow the machine to be started following, or during, a fault condition. This should be
implemented using a latched or locking contact on a selector switch. This operator is normally installed
in the control enclosure.
4.4.5 IDA Display Connections (Terminal Block 1 & 3)
The IDA display output terminals provide supply and control of the Dieselguard System’s intrinsically
safe display.
Terminal Block 1: IDA V+ should be connected to the 12V supply input of the IDA display.
Terminal Block 1: 0V should be connected to the 0V terminal of the IDA display.
Terminal Block3: IDA SIGNAL should be connected to the 4-20mA terminal of the IDA display.
Terminal Block 3: IDA RED should be connected to the Red (12V) terminal of the IDA display.
Terminal Block 3: IDA GRN should be connected to the Green (12V) terminal of the IDA display.
4.4.6 RTD Temperature Inputs (Terminal Block 4)
The Diesel Machine Monitor has one 4-wire RTD input (RTD1) and two 2-wire RTD inputs (RTD2 &
RTD3).
NOTE
If not in use, the RTD Inputs should be connected to the 0V terminal to
prevent the inputs from floating.
4.4.7 CH4 Transmitter Input (Terminal Block 1 & 5)
The GasGuard CH4 Transmitter should be powered from the SENSOR V+ supply on Terminal Block 1,
with the 0V connection being made on Terminal Block 5.
The 4-20mA output of the transmitter should be connected to the 4-20mA IN connection on Terminal
Block 5.
4.4.8 Speedo Input (Terminal Block 5)
The Diesel Machine Monitor is provided with an input for monitoring the speed of the diesel machine.
The Speedo input accepts a 5V pulse train input and records this information in the Diesel Machine
Monitor’s log in Hertz.