Hydronix Hydro-Control VI Installation Manual page 59

Chapter 5
system. A simple installation is shown in Figure 40, which can control one or two valves and
read a water meter.
In installations where the Hydro-Control is integrated with the batch control system, the most
important signals to and from the batch controller are the Start/Resume signal (to tell the Hydro-
Control that the mixer is ready for the water to be added), the Mix Complete signal (which
signals to the batch control system that the Hydro-Control has finished the water addition) and
the Reset signal (which is used to set the Hydro-Control back to standby mode). Other signals
should be used as needed.
At least 10 seconds should be allowed after sending the Reset signal before sending a Start
signal to begin the next batch.
Hydro-Control VI
+ -
21 22
O/P I/P
Water
-
Meter
+
Relay or
volt free output
water meter
Figure 40: Example Wiring Schematic For Manual Plant Operation
Remote Recipe Selection
3.2
If the recipe design in the mixer changes (for example if a different mix of aggregates is used,
a different type of cement, a different admixture, or a different colour or pigment) then it is
strongly recommended to use different recipes in the Hydro-Control for calibration and control.
In a system which is integrated to a batch control system, it is best to make the recipe selection
automatic.
Automatic recipe selection can be implemented either by using an RS232 link between the
batch system and the Hydro-Control or by using the recipe selection signals that are available
if the Expansion Board is fitted.
The Expansion Board has 9 connections (8 input connections with a common ground), and
accepts signals in the following formats:
• Binary (maximum of 255 recipes)
• Binary Coded Decimal (BCD) (maximum of 99 recipes)
• Discrete (maximum of 8 recipes)
+ -
3 4
Fine
- -
Valve*
+ +
External
24v DC
Power Supply
24v 0v
32 34
+ -
1 2
Coarse
-
Valve
+
Hydro-Control VI Installation Guide HD0455 Rev 1.9.0
System Design
0v B
Hydro-Mix
+24v A
or
Hydro-Probe
RS485 B G
Orbiter
RS485 A F
MIL-Spec
Connector
Pins
* Note if only one valve is
used, connect it to the
fine valve output
Field
- Power
Supply
+
59