17
System interface LHS 91 SYSTEM
The power of the unit can be controlled via the
interface (10)
with the signals IC 4 – 20 mA or UC 0 – 10 V. A supply
voltage of US 15 – 26VDC is also required. The
switch (9)
must be put on upper position.
1
U
S
GND
3
2
1
4
5
2
U
C
0 –10 V
3
I
C
4 – 20 mA
4
I
C
GND
5
U
S
Pin assignment (10)
Technical Data
Control signal
4 – 20 mA
Supply voltage
U
S
15 – 26 VDC
U
S
max.
26 VDC
Power consumption at 24 VDC
12 mA
Control current
I
C
4 – 20 mADC
I
C
ripple max.
< 0.1 mADC
I
C
max.
22 mADC
Input resistance (type)
230 Ohm
Control voltage
U
C
0 – 10 VDC
U
C
ripple max.
< 0.05 VDC
U
C
max.
12 VDC
Input resistance (type)
280 kOhm
Source
Interface (10)
Performance
U
s
I
c
+
-
-
+
3
1
4
5
0
10
20
30
40
50
60
70
80
90
100
4 8 12 16 20
Power f (control current)
Current [mA]
Heat output [%]
Control signal
0 – 10 VDC
Source
Interface (10)
Performance
U
s
U
c
+
-
-
+
2
1
5
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10
Power f (control voltage)
Voltage [V]
Heat output [%]
