5. Description of device function and setting
Information from regulator is available directly through LCD or you can read them with one of
next communication protocols ( Modbus RTU, Advantech-ADAM ).
5.1. Device setting from the manufacturer
communication protocol: Modbus RTU
regulator address: 1
communication speed: 9600Bd, no parity, 2 stop bits
Value assigned to Relay1 and Relay2: none
Password for setting through keys (PASS): 0000
LCD display: on
value shown at first LCD line: temperature / CO2 - by device type
value shown at second LCD line: relative humidity / dew point temp. - by device type
temperature unit: °C
computed value preset: dew point temperature
relay response for error: stay unchanged at previous condition
acoustic alarm: off
LED indication of CO
2
concentration up to 1000 ppm lights green LED, between 1000 and
1200 ppm lights yellow LED and over 1200 ppm
lights red LED
altitude: 300 m above sea level at the installation site
5.2. Relay outputs
Regulator is equipped with two relay outputs. It is possible to assign any input or computed value
or “Far condition” (see chapter “Far controlling of output relays status” at page 19) to each relay, to
set comparing alarm limit, if the relay may close if measured value is higher (Hi) or lower (Lo) than
preset limit, delay for while must be preset condition true before relay close its contact and hysteresis
for return to open status. For binary inputs: if it is preset to „HI“ then output relay is closed when
input contact is opened, if it is preset to „Lo“ then output relay is closed when input contact is closed.
Each relay status is indicated with LED diode and shown on LCD with corresponding symbols „
“ or „ “.
Terminal block for connecting the relays is equipped with terminals GND, which are connected
to the power supply of the device (see chapter “Typical application wiring, connection of terminals”).
When you need to use relays to switching the voltage identical with the supply voltage of the device,
you can use jumpers J1 and J2 for interconnection the power supply of the device directly with the
common contacts of the relays. This modification is used in devices with serial number higher
than 16981000 (the wiring diagram of the relay contacts for devices with serial number lower than
16981000 is given in the “Appendix B”).
The devices are equipped with two relays that are not intended for direct switching power circuits
or mains voltage. If necessary, use suitable type of external relay (an example of wiring is given in
the “Appendix A”).
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