Download EM-M22 TRMS 5A / 1A TO 4...20mA

EM-M22 TRMS 5A / 1A TO 4...20mA
FEATURES
• Measures TrueRMS
• Input ranges 5A and 1A
• Output 4...20mA and 1...5V
• Settable gain
• Over current protected
• Reverse current protected
• Easy to connect
• Rail mountable
EM-M22 is designed for measuring AC current. The device was designed to work with current transformer and
as a converter to current signal. The AC current is measured as TrueRMS, in other words the device gives
RMS output also from other than sinus shaped signals. The measured current is converted into 4...20mA
signal. There are two measuring ranges, 5A and 1A, which are standard current transformer output values.
The device takes it’s supply power from current loop and requires no other power supply. The device can also
be used as 1...5V signal transducer according to the schematic down low. EM-M22 is efficiently protected from
faulty connections and voltage peaks.
79mm
25mm
TECHNICAL DATA
Supply
Measuring range
Input impedance
Output signal
Linearity error
Thermal drift
Settling time
Frequency range
Loop resistance
Oper. ambient temp.
12...32 Vdc
5AC RMS 20A peak
1AC RMS 4A peak
0.05 ohm / 5A
0.27 ohm / 1A
4...20mA / 1...5V
<0.5% (sin)
<200ppm/°C
0.3s
45...1000Hz
0-700 ohm ( 24V )
0...50°C
EM-M22
4...20mA OUTPUT
12-32V
4
1 5A in
Rin at 5A range = 0.05 ohm
Rin at 1A range = 0.27 ohm
6
RL
86mm
1...5V OUTPUT
15-32V
4
RL= 0-700 ohm at 24V supply
1...5V
U-out
5
6
ELECTROMEN Oy, Turku, Finland
DIN-MOUNTING RAIL
WIDTH OF THE HOUSING IS 25MM
1...5V Uout
t
12...32V
4
15...32V
LARGEST POSSIBLE MEAS. RESISTOR
AS A FUNCTION OF OPER. VOLTAGE
VCC/V
4
30
TRMS-meas
1AC-IN
I-out 5 4...20mA
3 COM.
t
1
2 1A in
CURRENT
TRANSFORMER
4...20mA CURRENT LOOP
5AC-IN
AC-CURRENT to 4...20mA CONVERTER
2
i = 4...20mA
0.27
24
0.05
mA-conv.
5
3
LOOP RES.
MEAS
5
Uout 1...5V
18
COMMON
RL
250 ohm.
6
6
Rin
>250k
GAIN
12
<100
RL/ohm
ELECTROMEN Oy Vähäheikkiläntie 56B, 20810 Turku, FINLAND
<400
<700
<1000
RECOMMENDATION <800 ohm
Tel. +358-2-4693050 Fax. +358-2-4693052