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Modbus & Serial
Output Transmitter
for
DC Voltage or Current Input
DIN Rail mounted, digitally
programmable.
Exceptional accuracy at high update rates.
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Standard Features
-
0.2, 2, 20, 200,
300V & 600V input voltage ranges
- 2, 20, 200 mA & 5A
input current ranges
- All input ranges
selectable & factory calibrated
- Accuracy to 0.01% of full scale
- RS232 or RS485 serial communications,
half or full duplex, isolated
- Modbus RTU, Modbus ASCII
or Laurel ASCII protocol
- Output update rate to 60/sec
- Easy setup with PC-based
Instrument Setup Software
- DIN rail mount housing only 22.5 mm wide
- Detachable screw-clamp connectors
- 5V, 10V or
24V dc transducer excitation
output, isolated
- Dual solid state relays for alarm or control,
isolated
- 0-10V, 4-20 mA or 0-20 mA transmitter output,
isolated
- Universal AC power, 85-264 Vac
- Priced at only $235
(basic DC transmitter)
Options:
- Extended main board
for custom curve linearization & rate from
successive readings
- Low voltage
power, 10-48 Vdc or 12-32 Vac
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Description
The Laureate Modbus & serial output,
DC input
transmitter provides six voltage input ranges and four current input ranges, all
factory calibrated and jumper selectable. Accuracy is ±0.01% of full
scale input. The 200.00 mV and 2.0000 V
ranges provide a high input impedance of 1 Gohm to minimize the load on the voltage signal. A 5.000A
range measures the IR drop across a built-in 10 mW current shunt. The
transmitters can also easily be scaled in software for use with external
shunts. An isolate transducer excitation output is standard.
LTM Series serial output transmitters send data via an isolated serial port, which is user
configurable for RS232 or RS485 and full or half duplex operation. Three
protocols are user selectable: Modbus RTU, Modbus ASCII, or Laurel ASCII. Modbus operation
is fully compliant with Modbus Over Serial Line Specification V1.0 (2002).
The Laurel ASCII
protocol allows up to 31 Laureate devices to be addressed on the
same RS485 data line. It is simpler than the Modbus protocol and is
recommended when all devices are Laureates. It also allows use of
Laurel Datalogging Software.
Standard features of Laureate transmitters include:
- Serial data output, isolated. User selectable RS232 or RS485, half or full duplex, Modbus or
Laurel ASCII protocol.
- Dual solid state relays for control or alarm, isolated.
Rated 120 mA at 130 Vac or 170 Vdc.
- Transducer excitation output, isolated. User selectable 5V@100 mA, 10V@120 mA or 24V@50
mA.
-
Analog transmitter output, 16-bit, user scalable and isolated. User selectable 4-20 mA,
0-20 mA or 0-10V levels.
- Universal AC power supply for 85-264 Vac.
Easy Transmitter programming is via
Laurel's Instrument Setup Software,
which runs on a PC under MS Windows. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from
Laurel (P/N CBL04).
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Specifications
Laureate Modbus & Serial Output Transmitter
for DC Voltage or Current Input
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Analog Input |
Range |
Resolution |
Input Ohms |
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DC Voltage
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200.00 mV
2.0000 V
20.000 V
200.00 V
600.0 V |
10 µV
100 µV
1 mV
10 mV
100 mV |
1 Gohm
1 Gohm
10 Mohm
10 Mohm
10 Mohm |
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DC Current
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2.0000 mA
20.000 mA
200.00 mA
5.000 A |
0.1 µA
1 µA
10 µA
1 mA |
100 ohms
10 ohms
1 ohm
0.01 ohm |
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Input Resolution
Input Accuracy
Update Rate, Max
Max applied voltage
Current protection |
16 bits (65,536 steps)
±0.01% of full scale ± 2 counts
50/sec at 50 Hz, 60/sec at 60 Hz
600 Vac for 20, 200 & 600 V ranges, 125 Vac other ranges
25x for 2 mA, 8x for 20 mA, 2.5x for
200 mA, 1x for 5 A |
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Transducer Excitation Output (standard) |
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Output Levels
Output Isolation |
5V@100 mA, 10 @120 mA, 24V@50 mA (jumper
selectable)
50V from signal ground |
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Serial Data Output
(standard) |
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Signal Types
Data Rates
Output Isolation
Serial Protocols
Modbus Modes
Modbus Compliance
Digital Addressing |
RS232 or RS485 (half or full duplex)
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
RTU or ASCII
Modbus over Serial Line Specification V1.0 (2002)
247 Modbus addresses.
Up to 32 devices on RS485 line w/o a repeater |
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Dual Relay Output (standard) |
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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 (standard) |
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Output Levels
Compliance, 4-20 mA
Compliance, 0-10V
Output Resolution
Output Accuracy
Output Isolation |
4-20 mA, 0-20 mA, 0-10 Vdc (jumper selectable)
10V ( 0-500 ohm load )
2 mA ( 5 kOhm load or higher)
16 bits (65,536 steps)
0.02% of output span plus conversion accuracy
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
Power Frequency
Power Isolation
Power Consumption |
85-264 Vac or 90-300 Vdc (DC operation not UL
approved)
10-48 Vdc or 12-32 Vac
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test
2W typical, 3W with max excitation output |
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Mechanical |
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Dimensions
Mounting
Electrical Connections |
120 x 101 x 22.5 mm
35 mm rail per DIN EN 50022
Plug-in screw-clamp connectors |
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Environmental |
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Operating
Temperature
Storage Temperature
Relative Humidity
Cooling Required |
0°C
to 55°C
-40°C to 85°C
95% at 40°C, non-condensing
Mount transmitters with ventilation holes at top and bottom.
Leave 6 mm (1/4") between transmitters, or force air with a fan. |
Pinout
Laureate Modbus & Serial Output Transmitter
for DC Voltage or Current Input
Ordering
Guide
Laureate Modbus & Serial Output Transmitter
for DC Voltage or Current Input
Click on the radio buttons to build a model number with pricing (shown below the Ordering Guide).
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