RHEONIK Messgeräte GmbH
REV. I, Apr. 2004
.
Operation Manual RHE 07, 08, 11
Appendix
Electrical characteristics:
Intrinsically safe sensor RHM circuits, when connected to RHE:
Circuit name
Terminals Uo [V] Io [mA] Lo [mH]
Co [uF]
Po [mW]
Drive coil
1 - 2
8, 6
141
1,6
4,8
310
PT100 sense
3 - 4
7,4
29
35
10
54
PT100 current
3 - 5
7,4
29
35
10
54
Sense coil 1
6 - 7
7,4
29
35
10
54
Sense coil 2
8 - 9
7,4
29
35
10
54
Power supply circuit, remote unit RHE (galvanically isolated):
Remote unit type
Rated voltage
Rated frequency Maximum voltage (Um)
Rated power
RHE 06
230 VAC
50/60 Hz
250 VAC
15 VA
RHE 06
115 VAC
50/60 Hz
125 VAC
15 VA
RHE 07, 08, 11
230 VAC
50/60 Hz
250 VAC
10 VA
RHE 07, 08, 11
115 VAC
50/60 Hz
125 VAC
10 VA
RHE 07, 08, 11
24 VAC
50/60 Hz
26 VAC
10 VA
RHE 07, 08, 11
24 VDC
DC
30 VDC
10 VA
Temperature tables:
Measurement fluid temperatures (at ambient temperature 60°C):
Max. fluid temperature [°C] in temperature class
at
Ta
=
60°C
T6 T5 T4 T3 T2 T1
Sensor RHM NT
50
65
100
120
-
-
Sensor
RHM
ET
- - - 165
210
-
Sensor
RHM
HT
- - - 165
260
350
Min. fluid temperature [°C] in temperature class
at
Ta
=
60°C
T6 T5 T4 T3 T2 T1
Sensor
RHM
NT
-20 -20 -20 -20 -20 -20
Sensor
RHM
ET
-45 -45 -45 -45 -45 -45
Sensor
RHM
HT
-20 -20 -20 -20 -20 -20
Note: With the temperatures given, and for a certain temperature class the sensor RHM com-
ponents must not be subjected to any non-permissible temperatures.
Remote unit RHE ambient temperatures Ta :
Remote unit type
Min. T
a
[°C] Max.
T
a
[°C] Temperature
class
RHE 06
-40
+80
-
RHE 07
-40
+60
-
RHE 08
-40
+60
-
RHE 11
-40
+60
T5
Note: Remote units RHE 06, 07 and 08 are for installation in safe area only.
