CMM-2CH-10A60V
This module offers two separately isolated channels for current measurements over a wide range from 1µA to 10A. Ethernet and CAN-FD are available for communication. Current is measured in six automatically selected ranges as listed in the table below:
0
1µA
100µA
-
110µA
1
100µA
1mA
90µA
1.1mA
2
1mA
10mA
0.9mA
11mA
3
10mA
100mA
9mA
110mA
4
100mA
1A
90mA
1.1A
5
1A
10A
900mA
Module dimensions
160mm x 100mm (Eurocard)
19” specification
5 TE x 3 HE
Ambient operating temperature
5…50°C
Storage temperature
-20…70°C
Humidity
5…80% noncondensing
DC current
10
A
Worst case DC current
16
A
25° Ambient Temperature with airflow >2m/s
Maximum measurable current
16
A
Single pulse current
50
A
max. 100ms
DC Current per pin on backplane connector
6
A
Voltage across current in/out when module is off
60
V
Leakage current @ OFF
100
µA
60V across module , temperature 25°C
Isolation rating
-150
150
V
Maximum allowed voltage difference between module supply and current path
Reverse current continuous
4
A
Reverse current single pulse
30
A
Max. 100ms
Connect the power supply between +24V-CON and GND-CON. It is strongly recommended not to use the DUT power supply to power the CMM. Please note that the current path is interrupted when the module is unpowered.
Supply voltage
20
24
26
V
+24V-CON to GND-CON
Supply current (Ethernet port active)
110
mA
Supply voltage = 24V
Supply current (Ethernet port inactive)
95
mA
Supply voltage = 24V
Supply inrush current
3
A
Inrush current for < 1ms @ dU/dt ≈ 20V/ms, 24V supply
The module’s accuracy is verified for DC currents during in-house calibration. The module may of course be re-calibrated. See chapter "Calibration Recommendation" for more info.
Accuracy uncalibrated
0,5
2
%
% of respective range’s maximum current
Accuracy calibrated
0,2
1
%
% of respective range’s maximum current
Resolution range 0
40,4
nA
Resolution range 1
404
nA
Resolution range 2
4,04
µA
Resolution range 3
40,3
µA
Resolution range 4
403
µA
Resolution range 5
4,03
mA
The following table lists the voltage across the module’s current input and output pins for specific current values. These are typical values, measured at room temperature at the connector pins of one channel.
Drop @ 100µA
50
mV
Range 0
Drop @ 1mA
50
mV
Range 1
Drop @ 10mA
55
mV
Range 2
Drop @ 100mA
60
mV
Range 3
Drop @ 1A
60
mV
Range 4
Drop @ 10A
110
mV
Range 5
Drop @ 16A
180
mV
Range 5
The module supports 10Mbit/s and 100Mbit/s Ethernet on the RJ45 front connector. Default IP: 192.168.222.1
The module provides a CAN-FD interface on the front via a 9-pin D-Sub connector as well as on the backplane connector.
Supported nominal bit rates
500 kbit/s, 1 Mbit/s
Supported data bit rates
1 Mbit/s, 2 Mbit/s, 4 Mbit/s
Default settings
1 Mbit/s nominal, 4 Mbit/s data, no bit rate switch
120Ω on-board termination is available via jumper. On-board termination is only recommended if a single module is used without further devices connected via CAN. If multiple devices are connected via CAN, it is recommended to use external termination on both ends of the CAN harness. This avoids problems when modules are swapped or replaced.
Connector type: Harting 09041326921 Please make sure you use all connector pins for current in / current out. A backplane-pcb is available for easy connection with just two pins per current measurement channel.
A2
+24V module supply
C2
0V module supply
A4
CAN Low
C4
CAN High
A6
Channel 0 Current In
C6
Channel 0 Current In
A8
Channel 0 Current In
C8
Channel 0 Current In
A10
Channel 0 Current In
C10
Channel 0 Current In
A12
Channel 0 Current Out
C12
Channel 0 Current Out
A14
Channel 0 Current Out
C14
Channel 0 Current Out
A16
Channel 0 Current Out
C16
Channel 0 Current Out
A18
Channel 0 Current Out
C18
Channel 0 Current Out
A20
Channel 1 Current In
C20
Channel 1 Current In
A22
Channel 1 Current In
C22
Channel 1 Current In
A24
Channel 1 Current In
C24
Channel 1 Current In
A26
Channel 1 Current Out
C26
Channel 1 Current Out
A28
Channel 1 Current Out
C28
Channel 1 Current Out
A30
Channel 1 Current Out
C30
Channel 1 Current Out
A32
Channel 1 Current Out
C32
Channel 1 Current Out
IRS recommends a recalibration within 2 years.
The calibration should be performed for each channel at multiple calibration points for all 6 ranges. IRS recommends measuring at least the following currents.
100 uA
20 uA, 40 uA, 60 uA, 80 uA, 100 uA
1 mA
0.2 mA, 0.4 mA, 0.6 mA, 0.8 mA, 1 mA
10 mA
2 mA, 4 mA, 6 mA, 8 mA, 10 mA
100 mA
20 mA, 40 mA, 60 mA, 80 mA, 100 mA
1 A
0.2 A, 0.4 A, 0.6 A, 0.8 A, 1 A
10 A
2 A, 4 A, 6 A, 8 A, 10 A
Current values should be captured with the function (IRS.CMM-xCH.Shared.Gateway).GetMinMaxAverage. This function returns the value averaged since last read.
Before capturing a valid value, enable the calibration current, perform a dummy read and wait 100 ms.
The fluctuations of the power source used should not exceed 0.1% of the nominal value.
1.0
01.08.2023
madi1
Initial Release
1.1
11.10.2023
madi1
Add more values in section "Current Path"
1.2
13.12.2024
madi1
Update DLL name in section "Calibration Recommendation". Add recommendation for external CAN termination.
1.3
17.12.2024
miho1
Update supply current and DC voltage drop values
1.4
29.01.2025
madi1
Refactor datasheet for gitbook
