S-Klima CompTrol - Table 58: Direct Frequency Request with Cascading with Signal Overlap - Signal of 2 Nd Outdoor Unit

CompTrol Interface V4.0.x | Issue 21-05-2021 | 1000932 81
Program 9 – direct frequency request with cascading
Analog signal type Signal of 2nd outdoor unit
0-20 mA 10.8 mA
4-20 mA 12.6 mA
Table 58: Direct frequency request with cascading with signal overlap – signal of 2nd outdoor unit
For a description of setting signal ranges A and B for cascading without signal overlap, see sec-
tion “15.4.1 Setting the signal ranges via DIP switch S2” on page 82.
Cascading with signal overlap
The diagram below shows the control behavior of two CompTrol Interface expansion modules for
actuating two outdoor units each with a maximum frequency fmax Heating of 75 Hz with signal
overlap.
0
10
20
f min
f max
Heating
f max
Cooling
50
60
70
80
0 1 1,4 1,8 2,2 2,6 3,0 3,4 3,8 4,2 4,6 5,0 5,4 5,8 6,2 6,6 7,0 7,4 7,8 8,2 8,6 9,0 9,4 9,8 10
Compressor frequency f
[Hz]
40
30
Overlap of
signal ranges C and D
Signal range C
Signal range D
Legend
Cooling: 2nd outdoor unit
Cooling: 1st outdoor unit
Heating: 2nd outdoor unit
Heating: 1st outdoor unit
Voltage [V DC]
0 0,5 0,7 0,9 1,1 1,3 1,5 1,7 1,9 2,1 2,3 2,5 2,7 2,9 3,1 3,3 3,5 3,7 3,9 4,1 4,3 4,5 4,7 4,9 5
0 2 2,8 3,6 4,4 5,2 6,0 6,8 7,6 8,4 9,2 10 10,8 11,6 12,4 13,2 14 14,8 15,6 16,4 17,2 18 18,8 19,6 20
0 5,6 6,2 6,9 7,5 8,2 8,8 9,4 10,1 10,7 11,4 12 12,6 13,3 13,9 14,6 15,2 15,8 16,5 17,1 17,8 18,4 19 19,7 20
Voltage [V DC]
Current [mA]
Current [mA]
Type of input signal 0-5 V DC
Type of input signal 0-20 mA
Type of input signal 4-20 mA
Type of input signal 0-10 V DC
Figure 19: Direct frequency request with cascading with signal overlap