Hydronix Hydro-Probe Installation Manual page 24

Chapter 3
Digital Inputs
1.11
One configurable digital input 15-30 V dc activation
•
One configurable digital input/output – input specification 15 – 30 Vdc, output
•
specification: open collector output, maximum current 500mA (over current protection
required)
Connections
1.12
1.12.1 Sensor Cable
Six pairs twisted (12 cores total) screened (shielded) cable with 22 AWG, 0.35mm
•
conductors.
Screen (shield): Braid with 65% minimum coverage plus aluminium/polyester foil.
•
• Recommended cable types: Belden 8306, Alpha 6373
• 500 Ohm resistor – The recommended resistor is an epoxy sealed precision
resistor of the following specification: 500 Ohm, 0.1% 0.33W)
Maximum cable run: 100m, separate to any heavy equipment power cables.
•
Grounding
1.13
The sensor body is connected to the cable shield.
exposed metalwork. In areas of high lightning risk, correct and adequate protection should be
used.
The sensor cable shield is connected to the sensor body. To prevent earth loops the shield
must not be connected at the control panel.
24 Hydro-Probe Installation Guide HD0675 Rev 1.5.0
Technical Specification
Ensure equipotential bonding of all
2