090609/6 LEM reserves the right to carry out modications on its transducers, in order to improve them, without prior notice. www.lem.com
Page 1/3
IPN = 5 .. 150 A
Features
RMS output ●
Loop-powered 4-20mA current ●
output
Split-core type ●
Ø 16 mm sensing aperture for ●
non-contact measurement
Terminal output ●
Isolated plastic case recognized ●
according to UL 94-V0.
Advantages
High isolation between primary ●
and secondary circuits
Compact case ●
Cost-effective solution ●
Easy installation ●
Applications
Automation and Supervision ●
Current measurement for process
regulation by distributed PLCs
or remote control (e.g. SCADA
software)
Safety and Condition ●
Monitoring
Load monitoring for protection
systems and predictive
maintenance (e.g. conveyers,
pumps or HVAC motors)
Energy management ●
Convenient connection to power
consumption sub-meters
Application domain
Energy and Automation ●
15
20
25
30
35
400 500 600 700 800 900 1000
Max. Load Resistance (Ohm)
Electrical data
Primary nominal current rms Output current Type
IPN (A.t.Rms) IOUT (mA)
54-20 AT 5 B420L
10 4-20 AT 10 B420L
20 4-20 AT 20 B420L
50 4-20 AT 50 B420L
100 4-20 AT 100 B420L
150 4-20 AT 150 B420L
R LLoad resistance, with VC = + 24 V DC 1) < 600 W
VCSupply voltage (loop-powered) + 20 .. 30 V DC
ISL Output current limitation < 30 mA
ÎPOverload capability - continuous 120 % of IPN
- 1 min 150 % of IPN
Performance data
XAccuracy @ IPN, TA = 25°C (excluding offset) < ± 2 % of IPN
εLLinearity error < ± 0.5 %
IOE Electrical offset current, TA = 25°C 4 ± 0.2 mA
t rResponse time to 90% of IP step < 100 m s
BW Frequency bandwidth 50/60 Hz
General data
TAAmbient operating temperature - 20 .. + 60 °C
TSAmbient storage temperature - 20 .. + 85 °C
mMass 90 g
IPxx Protection degree IP40
AC Current transducer AT-B420L
Split-core transducer for the electronic measurement of AC waveform
currents, with galvanic isolation between the primary circuit (power) and the
secondary circuit (measurement). 4-20mA current output proportional to
the RMS value of the primary current.
IPN = 5 .. 150 A
071115/4 www.lem.com
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
Page 1/3
Features
•RMS output
•Loop-powered 4-20mA current output
•Split-core type
•Ø 16 mm sensing aperture for non-
contact measurement
•Terminal output
•Isolated plastic case recognized
according to UL 94-V0.
Advantages
• High isolation between primary and
secondary circuits
• Compact case
• Cost-effective solution
• Easy installation
Applications
• Automation and Supervision
Current measurement for process
regulation by distributed PLCs or
remote control (e.g. SCADA
software)
• Security and Condition Monitoring
Load monitoring for protection
systems and predictive
maintenance (e.g. conveyers,
pumps or HVAC motors)
• Energy management
Convenient connection to power
consumption sub-meters
Application domain
• Energy and Automation
Note: 1) Max. Load Resistance vs. Supply Voltage
AC Current transducer AT-B420L
Split-core transducer for the electronic measurement of AC waveform
currents, with galvanic isolation between the primary circuit (power)
and the secondary circuit (measurement). 4-20 mA current output
proportional to the RMS value of the primary current.
Electrical data
Primary nominal Output current Type
current rms
IPN (A.t.Rms) IOUT (mA)
5 4-20 AT 5 B420L
10 4-20 AT 10 B420L
20 4-20 AT 20 B420L
50 4-20 AT 50 B420L
100 4-20 AT 100 B420L
150 4-20 AT 150 B420L
RL Load resistance, with VC = + 24 V DC 1) < 600 W
VC Supply voltage (loop-powered) + 20 .. 30 V DC
ISL Output current limitation < 30 mA
ÎP Overload capability - continuous 120 % of IPN
- 1 min 150 % of IPN
Performance data
X Accuracy @ IPN, TA = 25°C (excluding offset) < ± 1.5 % of IPN
eL Linearity error < ± 0.5 % of IPN
IOE Electrical offset current, TA = 25°C 4 ± 0.2 mA
tr Response time to 90% of IPN step < 100 ms
BW Frequency bandwidth 50/60 Hz
General data
TA Ambient operating temperature - 20 .. + 60 °C
TS Ambient storage temperature - 20 .. + 85 °C
m Mass 90 g
IPxx Protection degree IP40
Note: 1) Max. Load Resistance vs. Supply Voltage
15
20
25
30
35
400 500 600 700 800 900 1000
Max. Load Resistance (Ohm)
Electrical data
Primary nominal current rms Output current Type
IPN (A.t.Rms) IOUT (mA)
54-20 AT 5 B420L
10 4-20 AT 10 B420L
20 4-20 AT 20 B420L
50 4-20 AT 50 B420L
100 4-20 AT 100 B420L
150 4-20 AT 150 B420L
R LLoad resistance, with VC = + 24 V DC 1) < 600 W
VCSupply voltage (loop-powered) + 20 .. 30 V DC
ISL Output current limitation < 30 mA
ÎPOverload capability - continuous 120 % of IPN
- 1 min 150 % of IPN
Performance data
XAccuracy @ IPN, TA = 25°C (excluding offset) < ± 2 % of IPN
εLLinearity error < ± 0.5 %
IOE Electrical offset current, TA = 25°C 4 ± 0.2 mA
t rResponse time to 90% of IP step < 100 m s
BW Frequency bandwidth 50/60 Hz
General data
TAAmbient operating temperature - 20 .. + 60 °C
TSAmbient storage temperature - 20 .. + 85 °C
mMass 90 g
IPxx Protection degree IP40
AC Current transducer AT-B420L
Split-core transducer for the electronic measurement of AC waveform
currents, with galvanic isolation between the primary circuit (power) and the
secondary circuit (measurement). 4-20mA current output proportional to
the RMS value of the primary current.
IPN = 5 .. 150 A
071115/4 www.lem.com
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
Page 1/3
Features
•RMS output
•Loop-powered 4-20mA current output
•Split-core type
•Ø 16 mm sensing aperture for non-
contact measurement
•Terminal output
•Isolated plastic case recognized
according to UL 94-V0.
Advantages
• High isolation between primary and
secondary circuits
• Compact case
• Cost-effective solution
• Easy installation
Applications
• Automation and Supervision
Current measurement for process
regulation by distributed PLCs or
remote control (e.g. SCADA
software)
• Security and Condition Monitoring
Load monitoring for protection
systems and predictive
maintenance (e.g. conveyers,
pumps or HVAC motors)
• Energy management
Convenient connection to power
consumption sub-meters
Application domain
• Energy and Automation
Note: 1) Max. Load Resistance vs. Supply Voltage