Laurel Electronics LTS6 - Datasheet - Manual

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1
LAUREL
ELECTRONICS, INC.
LTS6 Serial-to-Analog Converter
and DIN Rail Transmitter
Features
• Converts serial data to a isolated, scaled 4-20 mA or 0-10V transmitter output
• Accepts an RS232 or RS485 serial data, half or full duplex, isolated
• Supports Modbus RTU, Modbus ASCII, or Laurel ASCII protocols
• Able to retrieve data from long character strings
• Serial data rates from 300 to 19,200 bps
• Analog transmitter output, isolated
• Analog resolution 0.0015% of span (16 bits), accuracy ±0.02% of span
• Dual solid state relays for alarm or control, isolated
• Universal AC power, 85-264 Vac, or low voltage power, 10-48 Vdc or 12-32 Vac
Description
The Laureate LTS6 serial input to analog output transmitter
accepts RS232 or RS485 serial data using the Modbus protocol,
Laurel ASCII protocol, or direct ASCII characters, and converts
this data to an isolated, scalable 4-20 mA, 0-20 mA or 0-10V
analog output. The unit is housed in transmitter case which is
only 22.5 mm (0.89") thick and fits on a 35 mm DIN rail. It is
normally powered by AC (85-264 Vac), but can optionally be
powered by low voltage AC or DC. All electrical connections are
via detachable screw-clamp plugs.
Features include:
• Analog transmitter output, 16-bit, scalable and isolated.
User selectable 4-20 mA, 0-20 mA or 0-10V levels. A 16-bit
digital-to-analog converter provides ultra-fine resolution of
0.0015% and accuracy better than 0.02% of output span.
Output isolation from signal, power and serial communication
grounds is provided by a separate on-board transmitter power
supply, thereby eliminating potential problems caused by
ground loops. The supply can drive 20 mA into a 500Ω (or
lower) load for 10V compliance, or 10V into 5 kΩ (or higher)
load for 2 mA compliance.
• Serial communications input, isolated. User selectable
RS232 or RS485, half or full duplex, Modbus protocol, Laurel
ASCII protocol, or ASCII characters at data rates up to 19200
bps. The RS232 interface is suitable for short cable runs and
point-to-point communications. The RS485 interface is com-
pliant with the EIA/TIA-485 standard and supports multiple
addressable devices on the same data line using the Modbus
protocol or Laurel ASCII Protocol. Modbus implementation is
fully compliant with Modbus over Serial Line Specification V1.0
(2002) in RTU or ASCII, half-duplex or full-duplex operation,
with up to 247 digital addresses.
• Ability to extract readings from long ASCII data strings.
You can specify character positions, start and stop ASCII
characters, how many characters to skip, and how many
characters to process. Slave operation requires connection to
a master. Not applicable to the Modbus protocol.
• Dual solid state relays for control or alarm. Rated 120 mA
at 130 Vac or 170 Vdc, isolated.
• Universal AC power supply for 85-264 Vac.
• Optional low voltage power, 10-48 Vdc or 12-32 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 Laurel’s website at no charge.
The required cable from the transmitters to a PC com port is
available from Laurel (P/N CBL04).