ST747 - User Manual (ST541047)
INSTALLATION
It is essential to ensure that these devices are
NOT
mounted in a position,
which is close to any devices, or associated wiring, similar to the following:
Suggested Wiring Clearances
Min space ST747
Ignition HT & coil leads
75mm (3”)
Radio transmitters
50mm (2”)
Fast switching inductive loads like
fuel injectors, hydraulic solenoids.
50mm (2”)
Any powerful source of heat
Shield with reflective
material
Although it is possible to mount the sensors directly to the engine
block, if the engine vibration is excessive, it is recommended that they
are mounted indirectly, if possible, using flexible connections.
All STACK pressure sensors will withstand an over-pressure of only double
their working maximum. Therefore, it is recommended that they be
connected via an in-line pressure restrictor to eliminate the possibility of
damage from any short high-pressure pulses, which may exist. If an
adaptor is required to enable mounting of the transmitter it is possible to
incorporate the restrictor into this part. The restriction should take the form
of a 1mm diameter x 25mm long hole.
Sensor Connections
Sensors connect into Stack Systems via a four way, Mini Sure Seal (MSS)
connector. The following polarity is observed in all cases:
= Pin
= Socket
Plug
Harness End
Socket
Sensor End
1
2
3
4
1
2
3
4
These terminals must be connected to the corresponding terminals of the
selected input channel.
Pin Number Signal Description
1
Output from sensor
2
5v supply voltage
3
No connection
4
0v
ST747 TECHNICAL SPECIFICATION
Range
10 Bar
Over-range
20 Bar
Resolution
100 mB
Accuracy
2%
Accuracy/Temp
3%
Output Voltage
0.5 – 4.5 volts
Working Temp
-30 to +120 Degrees Centigrade
Storage Temp
-40 to +140 Degrees Centigrade
Vibration
15G (33.3 to 200 Hz)
Pressure Port
1/8” NPTF Male
Sealing
IP65
