7
Chlorine Probe and Analog Output Wiring
Note:
If your HydroACT Analyzer was supplied with additional sensors and I/O that are not discussed in this guide, be sure to
refer to the full product manual and/or any supplementary documentation for more information. Wiring connection diagrams
for sensors and outputs are also available on the HydroACT display by going to Menu > (Select sensor or output) > Options >
Connections.
Chlorine Probe Input Card
A chlorine probe input card is installed in Slot #1 as shown in above diagram and has a 4-position terminal for the connection
to the chlorine probe. The interconnect cable supplied with the chlorine probe must be connected to this input card: with
the white wire connected to the top terminal and the blue wire connected to the next terminal down.
Analog Outputs
An analog output card is installed in Slot #8 and is referred to as “Analog Output 1.8” within the display user menu. Unless
additional sensors were supplied with HydroACT, this output will be mapped to the Free or Total chlorine reading that is
originating from the probe connected to Slot #1. This output provides a 4-20 mA output signal proportional to the chlorine
reading. The above diagram shows where the connections are located for the +4-20 mA and -4-20 mA on output card. See
next page for the analog output setup and scaling instructions.
Relays and Digital Inputs (Optional)
Relays and Digital Inputs are optional and do not come activated on HydroACT unless ordered. If these options are required
but were not originally ordered with the analyzer, they can be activated by contacting Chemtrac and acquiring the necessary
activation codes. If relays were ordered, see next page for setup instructions. Refer to HydroACT manual for Digital Input
setup instructions.
Auxiliary Power Terminals
Auxiliary DC Power Terminals (selectable for 12 or 24 VDC using internal jumper) and Auxiliary Line Power Terminals (110 or
220 VAC) provide power for certain types of sensors, as well as external devices (e.g., valves or chemical feed pumps) that
would be controlled via the relays. Note: The Aux Line Power Terminals are not protected by an internal fuse. Caution must
be taken when connecting external devices so as to not overload the current handling capacity of the circuit (rated for 5 Amps).
Refer to HydroACT manual for more details.
Digital Communication
HydroACT has 3 plug-in card slots (to the left of the sensor slots) for optional digital communication cards. These can include
Modbus RTU or TCP, PROFIBUS, and cellular modem cards. Refer to HydroACT manual for more details.
Chlorine Probe
Connection
