30
Fan Speed Digital & Analog Signals Conversion
ENC2, 3 and 4 dene low, medium and high speed
between digital and analog signals for both input and
output. By default, ENC2 is set at 2V, ENC3 at 7V and
ENC4 at A (A means 10V) in factory. Either a digital or
analog input is received. Both analog output and a digital
output are transmitted.
NOTE - ENC2<ENC3<ENC4.
(2V Factory Default) (7V Factory Default)
(10V
Factory Default)
Dial code
1
0
1
3
4
5
6
7
8
9
1
2
2
3
4
5 6
7
8
9
10
10
10
10 10
10
A
B
C
D
E F
Voltage (V)
Low speed
Mid. speed
High speed
ENC2
ENC3
ENC4
0-10V Output Voltage
Table 7. Digital and Analog Signal Correlation Setting
When digital input is received at Mi, digital output of me-
dium speed Mo is closed and analog output Ao is 7VDC.
When analog input is received 8VDC which is between
7V (medium) and 10 V (high), digital output of high speed
Ho is closed and analog output Ao is 8VDC which is
always the same as analog input Ai.
When the kit receives 2 or 3 digital signals at Hi, Mi and
Li at the same time and no analog signal Ai, the highest
speed signal overrides the lower ones.
When both digital input and analog input signals are re-
ceived at the same time, error code H9 shall display and
the kit shall be shut down.
Figure 22. Fan Speed Switching at Ho, Mo & Lo
3 Speeds
Case Input channel Output Channel Note
Hi Mi Li Ai Ho Mo Lo Ao
1=closed 0~10VDC 1=closed 0~10VDC 1 input
1 0~0.1 0 1 input
2 1 0~0.1 1 10 1 input
3 1 0~0.1 1 7 1 input
4 1 0~0.1 1 2 1 input
5 7.2~10 1 =Ai 1 input
6 2.2~7.1 1 =Ai 1 input
7 0.2~2.1 1 =Ai 1 input
8 1 1 1 0~0.1 1 10 multi inputs
9 1 1 1 0.2~10 0 multi inputs, error H9
NOTE - Fan is switched from Mo to Ho when Ai rises to 7.8V and from Ho to Mo when Ai falls to 7.2V. Similar between
Mo and Lo.
Table 8. Fan Speed Outputs Dependency on One Input
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