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Load Cell & Microvolt Input
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Features
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Description
Built-in Load Cell Excitation
Fast Read Rate
Selectable Signal Filtering
Easy Setup & Scaling
Options
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Specifications
Laureate Serial Output Transmitter,
Load Cell or Microvolt Input
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Analog Input |
Range | Resolution | Input Ohms |
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Load Cell |
±20.000 mV ±50.0000 V ±100.00 V ±250.00 V ±500.00 V |
-99,999 to +99,999 zero adjust. 0 to ±99,999 span adjust. |
1 Gohm |
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Microvolt Meter |
±20.000 mV ±50.0000 V ±100.00 V ±250.00 V ±500.00 V |
1 µV 2.5 µV 5.0 µV 12.5 µV 25 µV |
1 Gohm |
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Input Resolution Input Accuracy Output Update Rate, Max Max Applied Voltage |
16 bits (65,536 steps) ±0.01% of full scale input (determined by ADC). 50/sec at 50 Hz, 60/sec at 60 Hz. 100 V |
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| Serial I/O (standard) | |||
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Signal levels Data Rates Output Isolation Serial Protocols Devices on RS-485 Line Modbus Addresses Modbus Modes Modbus Compliance |
RS485 (default) or RS232 (jumper selectable) 300, 600, 1200, 2400, 4800, 9600, 19200 baud 250V rms working, 2.3 kV rms per 1 min test. Modbus RTU, Modbus ASCII, Laurel ASCII (selectable) 32 max without a repeater. 247 max RTU or ASCII, 2-wire. Modbus over Serial Line Specification V1.0 (2002). |
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| Transducer Excitation Output (standard) | |||
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Jumper Selection 1 Jumper Selection 2 Jumper Selection 3 |
10V @ 60 mA, isolated to 50V from signal ground 5V @ 50 mA, isolated to 50V from signal ground 15V @ 60 mA, non-isolated |
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| Dual Relay Output (optional) | |||
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Relay Type Load rating |
Two solid state relays, SPST, normally open,
Form A 120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance. |
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| Analog Output (optional) | |||
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Output Levels Compliance, 4-20 mA Compliance, 0-10V Output Resolution Output Accuracy Output Isolation |
0-20 mA, 4-20 mA or 0-10 Vdc (selectable) 10V ( 0-500 ohm load ) 2 mA ( 5 kOhm load ) 12 bits (4,096 steps) ±0.05% of output span 250V rms working, 2.3 kV rms per 1 minute test |
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| Power Input | |||
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Standard power Low power option Frequency Power Isolation |
95-240V AC ±10% or 90-300V DC 12-30V AC or 10-48V DC DC or 47-63 Hz 250V rms working, 2.3 kV rms per 1 min test. |
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| Mechanical | |||
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Case Dimensions Case Mounting Electrical Connections |
120 x 101 x 22.5 mm 35 mm rail per DIN EN 50022 Detachable screw terminal connectors |
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| Environmental | |||
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Operating Temperature Storage Temperature Relative Humidity |
0°C to
70°C -40°C to 85°C 95% at 40°C, non-condensing |
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Pinout
Laureate Serial Output Transmitter,
Load Cell or Microvolt Input
(shown with optional analog output
and dual relay
output)

For 4-wire load cell connection, jumper Pin 1 to Pin 2, and Pin 5 to Pin 6.
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Load Cell
Transmitter Connections |
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In 4-wire connection, the excitation and sense lines are tied together. The meter can make ratiometric corrections for supply voltage variations, but not compensate for variations in lead resistance. This connection is often used with short cable runs. | |
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In 6-wire connection, the sense lines are separate from the excitation lines, thereby eliminating effects due to variations in lead resistance. This allows long cable runs in outdoor environments with temperature extremes. | |
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For large scales, up to four 350 ohm load cells in parallel can be powered by a single Laureate transmitter at 5V excitation. The excitation and sense points of the four bridges are connected in parallel through a summing box. | |
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Ordering
Guide
Modbus
or Laurel ASCII Protocol Serial I/O Transmitter,
Load Cell or Microvolt Input
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number in this format: TM2020WM. This example calls out a
Modbus output transmitter, standard main board, 95-240
Vac power, isolated dual solid state relays, and a load
cell signal conditioner at the default setting 0-20 mV
in = 4-20 mA out. Includes plug-in screw terminal
connectors. |
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Transmitter Type |
TM Laureate Transmitter, Modbus or Laurel ASCII Protocol. | $210 |
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Main Board |
2 Standard Main Board. 4 Extended Main Board. Note: Extended allows custom curve linearization and rate from successive readings. |
NC $40 |
| Power |
0 Isolated 95-240 Vac & 90-300 Vdc 1 Isolated 12-30 Vac & 10-48 Vdc. |
NC $30 |
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Setpoint Output |
0 None. 2 Isolated Dual Solid State Relays. |
NC $30 |
| Analog Output |
0 None. 1 4-20 mA, 0-10V. |
NC $25 |
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Signal Input |
Load Cells
(6-wire ratio) WM Default Scaling. 0-20 mV in = 4-20 mA out. WM1 Custom Scaling. In the write-in field of your invoice, specify min input, min reading; max input, max reading. Full-scale input is 20-500 mV. Includes 10V excitation for up to four 350-ohm load cells in parallel. |
$55 |
| Accessories |
CBL03 RS-232 cable, TM to computer. CBL02 USB to RS-232 cable adapter. |
$19 $39 |
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Resource Pages |
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3183-G Airway Avenue Costa Mesa, CA 92626, USA |
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