DATUM ELECTRONICS
M425 TORQUE TRANSDUCER HANDBOOK
15
SPECIFICATIONS
M425 performance information
PERFORMANCE
Non-Linearity
+/-0.1% FSD
Non-Repeatability
+/-0.05% FSD
Noise-free Resolution
20 bit to 13.5 bit
(dependent on sample rate)
Sample Rate
1 to 4000 samples per second
Output Baud Rate
9600 to 3Mbaud (see table 13)
RPM:
Size 1 & 2
60 pulses per rev
Size 3, 4, 5 & 6
30 pulses per rev
Transducer output interfaces:
Serial data via RS485
RS232 (option)
Transducer output data:
Torque
Shaft RPM
Shaft Temp.
Diagnostics
Table No. 4
ENVIRONMENT
Thermal Stability of Gain per 10˚C 0.02%
Thermal Stability of Zero per 10˚C
0.02%
Normal Specification Range
10 to 60˚C
Operating Range
-10 to +70˚C
Storage Range
-35 to +75˚C
Environmental Protection
IP54 (see RS425 for IP67/68)
Electromagnetic Compatibility
EN61326-1:2006
(IEC61000-4), IEC60945)
Table No. 7
SIGNAL INTERFACE OUTPUTS
Digital:
RS485
Serial data
RS232
Serial data
Ethernet
Data and configuration
MODBUS UDP
Serial data
USB Type Mini B
Serial data
USB Type A
Data
l
ogging
Analogues:
All four of the M425 Transducer’s analogue output channels can be
configured for any of the following settings by the user:
4-20mA configured 4-20mA (4-12-20mA):
+/-10Vdc, +/-5Vdc, 0-10Vdc or 0-5Vdc
A typical configuration arrangement would be as follows:
Channel 1 - Torque
from 0-500Nm as 4-20mA
Channel 2 - Speed RPM
from 0-100-rpm as 0-5Vdc
Channel 3 - Power
from 0-5000W as 4-20mA
Channel 4 - Spare
Display:
Torque
Speed RPM
Power
Status
Table No. 6
POWER SUPPLY
Transducer
10-24Vdc 250mA
Transducer and Interface
15-24Vdc 400mA
Table No. 5
Rotor
Stator
Torque
Sensor
Bridge
Host
Power
M420 block diagram
+
-
POWER
DATA
CONTROL
SERIAL DATA
Diagram No. 14
M425 block diagram
