Fast read rate at up to 50 or 60 conversions per second while integrating the signal over a full power line cycle is provided by Concurrent Slope (Pat 5,262,780) analog-to-digital conversion. High read rate is ideal for peak or valley capture and for real-time computer interface and control. Digital signal filtering modes are selectable for stable readings in electrically noisy environments. The internal digital readings and analog output can be individually selected to be either unfiltered or filtered.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 ofLaurel Datalogging Software.
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).
|Analog Input||Range||Input Ohms|
|Input Resolution||16 bits (65,536 steps)|
|Input Accuracy||±0.01% of full scale ± 2 counts|
|Update Rate, Max||50/sec at 50 Hz, 60/sec at 60 Hz|
|Max Applied Voltage||600 Vac for 20, 200 & 600 V ranges, 125 Vac other ranges|
|Over-current Protection||25x for 2 mA, 8x for 20 mA, 2.5x for 200 mA, 1x for 5A|
|Transducer Excitation Output (standard)|
|Output Levels||5V@100 mA, 10V@120 mA, 24V@50 mA (jumper selectable)|
|Output Isolation||50V from signal ground|
|Serial Data Output (standard)|
|Signal Types||RS232 or RS485 (half or full duplex)|
|Data Rates||300, 600, 1200, 2400, 4800, 9600, 19200 baud|
|Output Isolation||250V rms working, 2.3 kV rms per 1 min test|
|Serial Protocols||Modbus RTU, Modbus ASCII, Laurel ASCII|
|Modbus Modes||RTU or ASCII|
|Modbus Compliance||Modbus over Serial Line Specification V1.0 (2002)|
|Digital Addressing||247 Modbus addresses.
Up to 32 devices on an RS485 line w/o a repeater.
|Dual Relay Output (standard)|
|Relay Type||Two solid state relays, SPST, normally open, Form A|
|Load Rating||130 mA at 140 Vac or 180 Vdc|
|Output Levels||0-20 mA or 0-10 Vdc (selectable)|
|Compliance, 4-20 mA||10V ( 0-500 ohm load )|
|Compliance, 0-10V||2 mA ( 5 kOhm load )|
|Output Resolution||16 bits (65,536 steps)|
|Output Accuracy||0.02% of output span plus conversion accuracy|
|Output Isolation||250V rms working, 2.3 kV rms per 1 minute test|
|Standard Power||85-264 Vac or 90-300 Vdc (DC operation not UL approved)|
|Low Power Option||10-48 Vdc or 12-32 Vac|
|Power Frequency||DC or 47-63 Hz|
|Power Isolation||250V rms working, 2.3 kV rms per 1 min test|
|Power Consumption||2W typical, 3W with max excitation output|
|Dimensions||129 x 104 x 22.5 mm case|
|Mounting||35 mm rail per DIN EN 50022|
|Electrical Connections||Plug-in screw-clamp connectors|
|Operating Temperature||0°C to 55°C|
|Storage Temperature||-40°C to 85°C|
|Relative Humidity||95% at 40°C, non-condensing|
|Cooling Required||Mount transmitters with ventilation holes at top and bottom.
Leave 6 mm (1/4") between transmitters, or force air with a fan.