Chemtrac HydroAct HA4, Руководство пользователя

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5.2 Relay Output 81
The image above is for an output with the types selected as 0..20mA or 4..20mA. The connections will
reflect the configuration of the device and differ between current and voltage outputs.
5.2 Relay Output
5.2.1 General Information
Relay outputs, typically mechanical reed relays are installed at time of manufacture. A relay is a
mechanical or electronic device mounted on the electronics within the instrument that can switch. The
number and type of relays must be specified at time of order. In order to take advantage of the full
capability of modern electronics, it is necessary to “map”
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the various alarms, thresholds and other
options to the relays.
5.2.2 Technical Data
Maximum Current 10A at 125 VAC, 3A at 250 VAC, 5A at 30 VDC
5.2.3 Operation
To access the relay output setup and maintenance options, select the relevant device tile in the main
menu and press “Select”. The output setup screen will be displayed initially, though other functions are
available by pressing the “Options” button.
5.2.3.1 Setup
The setup of the analog output is split into three sections. Later sections can be accessed separately
from the options or by selecting “Next” from any of the previous sections.
To access the relay output setup:
Options → Setup → Output Setup
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This describes the link between a signal/value generated by the instrument and an output device (relay or analog).