Madman EMS-3 Operating Manual Page 33
A 220Ohm ballast resistor can be connected across the RPM input to ground to reduce noise or secondary pulses on the
RPM line.
After you have connected the RPM input terminals to the signal sources you will need to set the number of pulses per
revolution under the “RPM SETUP” menus. The calibration itself depends on your engine and what kind of signal you are
using.
10.10 Temperature senders
Resistive senders: The EMS-3 supports resistive type temperature senders. The internal pull up resistor dip switch
for the resistive temperature sender input must be in the “ON” position.
VDO Resistive senders: The EMS-3 supports the VDO 120ºC and 150ºC thermistor automotive senders. The
internal pull up resistor dip switch for the resistive temperature sender input must be in the “ON” position.
Echlin TS920SA resistive senders: The internal pull up resistor dip switch for the resistive temperature sender
input must be in the “ON” position.
Most NTC senders require a single wire connected as shown in the installation diagram. The sender is grounded via the
engine block. The ground terminal of the gauge input should be connected to the engine block. Some NTC senders have
two wires. In this case it is not required that the sender housing itself is connected to the engine block. Wire the second
wire to the reference ground terminal.
Precision senders (On Semiconductors LM335): These are senders containing a semiconductor
temperature measurement device. They can be used for water or oil temperature. These senders are available in two
types: an encapsulated version with a brass housing; a second uncommitted version contains only the sensor itself. This
can be conveniently mounted inside an existing sender housing after you remove the original insides of the sender. This
is intended to give you a solution for unusual or difficult to obtain senders. The internal pull up resistor dip switch for the
resistive temperature sender input must be in the “ON” position.
User defined senders: The EMS-3 has a user sender calibration feature that can be customized for senders not
listed above.
10.11 Pressure senders
Resistive senders: The EMS-3 supports resistive type pressure senders. The internal pull up resistor dip switch for
the resistive pressure sender input must be in the “ON” position.
VDO Resistive senders: The EMS-3 includes linearisation curves for the VDO 2, 5 and 10 Bar pressure senders.
The internal pull up resistor dip switch for the resistive pressure sender input must be in the “ON” position.
4-20mA Pressure Senders: The EMS-3 supports 4-20mA pressure senders. A 100Ohm 1/4W 1% resistor must be
connected across the analog input channel to ground. The internal pull up resistor dip switch for the 4-20mA current
sender input must be in the “OFF” position.
Voltage output pressure senders: The EMS-3 supports voltage output pressure sender. The EMS-3 also has a
0.5-4.5V sender selection. The internal pull up resistor dip switch for the voltage output pressure sender input must be in
the “OFF” position.
Voltage output pressure senders: The EMS-3 includes linearisation curves for the SENDO MPS 2, 5, 7 and 10
Bar pressure senders. The internal pull up resistor dip switch for the 0.5-4.5V sender input must be in the “OFF” position.
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