Laurel Electronics LTE Ethernet 4-20 User Manual

LAUREL
Ethernet & 4-20 mA Output Transmitter
for Time of Single or Accumulated Events
Features
Ethernet Serial Data I/O, Modbus TCP or Laurel ASCII protocol
4-20 mA or 0-10V transmitter output, 16 bits, jumper selectable, isolated
Dual 120 mA solid state relays for alarm or control, isolated
5V, 10V or 24V dc transducer excitation output, isolated
Transmits single event time or accumulated time of all events
Timing from 0.2 µs to 999,999 hrs
Inputs from NPN or PNP proximity switches, contact closures, digital logic, or magnetic pickups down to 12 mV.
Analog output resolution 0.0015% of span (16 bits), accuracy ±0.02% of span
Universal 85-264 Vac / 90-300 Vdc or 10-48 Vdc / 12-32 Vac power
Power over Ethernet (PoE) jumper selectable with 10-48 Vdc supply
Description
The Laureate stopwatch transmitter outputs isolated analog
and serial data signals whose values track the time of single events which produce start and stop pulses, or the accumulated time of multiple events. It can also time the width of a single pulse. The highest resolution is 0.2 µs, making the transmitter ideal for fast events. The longest timing interval is 999,999 hrs. For long events, the analog output is updated continuously during timing. There are two primary timing modes:
A-A Stopwatch Mode: Time is measured between a start pulse and a stop pulse, both on Channel A, from either the positive or negative edges.
A-B Stopwatch Mode: Time is measured between a start pulse on Channel A (positive or negative edge) and a stop pulse on Channel B (positive or negative edge). This mode allows inputs from different sources. In addition, the A and B inputs can be tied together to start the stopwatch with one polarity and stop it with the other polarity.
Event time (Item #1) is measured by counting 5.5 MHz clock pulses from a calibrated quartz crystal. The stopwatch output is updated during timing at a rate controlled by a gate time, up to 25/sec. Time is reset to zero when the next start pulse occurs.
Accumulated time (Item #2) from multiple events up to 999,999 hours is also tracked and can be transmitted.
The dual-channel signal conditioner used for pulse detection accepts inputs from proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, and AC signals from 12 mV to 250 Vac. Jumper selections provide opti­mum operation for different sensor types and noise conditions.
Standard features of Laureate LTE transmitters include:
Ethernet I/O, isolated. Supported protocols are Modbus RTU and ASCII (tunneled via Modbus TCP) and Laurel ASCII. The latter is simpler than the Modbus protocol and is recom­mended when all devices are Laureates. Note that RS232 or RS485 data I/O in lieu of Ethernet is provided by our LT Series transmitters.
4-20 mA, 0-20 mA or 0-10V analog transmitter output, isolated, jumper-selectable and user scalable. All selections provide 16-bit (0.0015%) resolution of output span and 0.02% output accuracy of a reading from -99,999 to +99,999 counts that is also transmitted digitally. Output isolation from signal and power grounds eliminates potential ground loop problems. The supply can drive 20 mA into a 500 ohm (or lower) load for 10V compliance, or 10V into a 5K ohm (or higher) load for 2 mA compliance.
Dual solid state relays, isolated. Available for local alarm or control. Rated 120 mA at 130 Vac or 180 Vdc.
Transducer excitation output, isolated. User selectable 5V@100 mA, 10V@120 mA or 24V@50 mA.
Universal 85-264 Vac power. Low-voltage 10-48 Vdc or 12-32 Vac power is optional.
Discovery and configuration of Laureate Ethernet Nodes is easily achieved with Laurel's Node Manager Software, and the discovered transmitters can then be programmed using Laurel's Instrument Setup Software. Both softwares run on a PC under MS Windows and can be downloaded at no charge.
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA Tel 714-434-6131 www.laurels.com 1
Specifications
Pulse Input
Signal Input Signal Ground Minimum Signal Maximum Signal Maximum Frequency Contact Debounce Time Base Accuracy Span Tempco Long-term Drift
Analog Output (standard)
Output Levels Compliance, 4-20 mA Compliance, 0-10V Output Resolution Output Accuracy Output Update Rate Output Isolation
Serial Data Output (standard)
Type Data Rates Output Isolation Serial Protocols Modbus Compliance Digital Addresses
Dual Relay Output (standard)
AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups. Common ground for channels A & B Nine ranges from (-12 to +12 mV) to (+1.25 to +2.1V). 250 Vac 1 MHz, 30 kHz, 250 Hz (selectable). 0, 3, 50 ms (selectable). Quartz crystal calibrated to ±2 ppm. ±1 ppm/°C (typ) ±5 ppm/year
4-20 mA and 0-10 Vdc (selectable) 10V (0-500Ω load) 2 mA (5 kΩ load) 16 bits (65,536 steps) ±0.02% of output span Programmed gate time + 30 ms + 0-2 signal periods 250V rms working, 2.3 kV rms per 1 minute test
10/100Base-T Ethernet per IEEE 802.3 300, 600, 1200, 2400, 4800, 9600, 19200 baud 250V rms working, 2.3 kV rms per 1 min test Modbus TCP, Modbus RTU, Modbus ASCII, Laurel ASCII Modbus over Serial Line Specification V1.0 (2002) 247 for Modbus, 31 for Laurel ASCII
Relay Type Load Rating
Sensor Excitation Output (standard)
Output Levels Output Isolation
Power Input
Standard Power Low Power Option Power Frequency Power Isolation Power Consumption
Mechanical
Dimensions Mounting Electrical Connections
LAUREL
Two solid state relays, SPST, normally open, Form A 120 mA at 140 Vac or 180 Vdc
5V@100 mA, 10V@120 mA, 24V@50 mA (jumper selectable) 50V from signal ground
85-264 Vac or 90-300 Vdc (DC operation not ETL 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
129 x 104 x 22.5 mm case 35 mm rail per DIN EN 50022 Plug-in screw-clamp connectors
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA Tel 714-434-6131 www.laurels.com 2
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