Merlin RS Installation & Operation Manual
REV 06 Page 6 of 12
Power Wiring
Consider voltage drops due to cable resistance and strip the cables as short as possible ensuring bare wires,
e.g., wire shields, do not contact with the circuit board (risk of short-circuit).
24V IN AC/DC
230V AC POWER / LINE IN
+10V Output Wiring
A 10V output is normally used to regulate external fan speed controllers (supplied separately).
The RS features a configurable 0/2-10V linear output for CO
2
(PPM), Temperature (C/F°) and Humidity (rH%).
During normal operation, the output of the device is proportional to the values.
In normal operation, output levels are proportional to the gas level as shown below.
O/P
CO
2
Range
Temperature
Humidity
0-10V O/P
2-10V O/P
0%
0ppm
0°C
0%rH
0V
2V
10%
*200
500
5
10
1V
2.8V
20%
400
1,000
10
20
2V
3.6V
30%
600
1,500
15
30
3V
4.4V
40%
800
2,000
20
40
4V
5.2V
50%
1,000
2,500
25
50
5V
6.0V
60%
1,200
3,000
30
60
6V
6.8V
70%
1,400
3,500
35
70
7V
7.6V
80%
1,600
4,000
40
80
8V
8.4V
90%
1,800
4,500
45
90
9V
9.2V
100%
2,000ppm
5,000ppm
50°C
100 %rH
10V
10V
* The average concentration of CO2 in air is around 400ppm or 0.4%