Hydronix Hydro-Control VI, Installation Manual

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Electrical Installation Chapter 3
28 Hydro-Control VI Installation Guide HD0455 Rev 1.9.0
These are designed for future expansion.
Note that all ‘-‘ connections for the analogue inputs and outputs are connected to a
common analogue ground.
6.5
Wiring recipe selection inputs
External Power
Supply
PLC outputs or
push button station
Hydro-Control VI
Expansion Board
Recipe Inputs
Input 1
GND
Input 2
Input 3
Input 4
Input 5
Input 6
Input 7
Input 8
0v +24v
Figure 17: The recipe selection input wiring
The recipe inputs are 2mA current sinks. They switch on a DC input signal with a nominal
voltage of 24v (the range of the DC voltage is actually 9-36v). There is one common ground
for all eight input signals as shown in Figure 17.
7 Cables
7.1
Sensor cable
The sensor must be connected using an extension cable made up from a suitable length of two
pairs twisted (4 cores total) screened (shielded) cable with 22 AWG, 0.35mm
2
conductors. It is
recommended that a high quality cable with good braid screen and also a foil screen is used in
order to minimise the possibility of interference. Recommended cable types are Belden 8302
or Alpha 6373.
For optimum performance (and to comply with relevant safety regulations) all cables, including
power and communications cables, must be screened and the screen must be connected to
the Hydro-Control.
The cable from the sensor to the control unit must be distanced from any heavy equipment and
associated power cables, particularly the power cable for the mixer. Failure to separate the
cables can lead to signal interference.
7.2
Analogue cables
The analogue cables should be of good quality screened cable. They should be distanced from
heavy equipment and power cables to avoid signal interference.
8 USB Ports
The Hydro-Control has three USB ports built into the unit to enable backup, restore and upgrade
of the system. Each of these can accept a standard USB memory stick.