Laurel Electronics LTNET485 User Manual

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Description
LAUREL
LTNET485 DIN Rail Mounted
Ethernet-to-Serial Device Server
Connects up to 31 meters & transmitters to the Ethernet via an RS485 bus
Features
Interfaces to the Ethernet via an RJ45 jack.
Mounts to 35 mm DIN rail.
Universal AC power, 85-264 Vac
Optional low voltage power, 10-48 Vdc or 12-32 Vac
Priced at only $150
DHCP server capability assigns a local IP address to the server and computer if necessary.
Network with an LTNET485 Ethernet-to-RS485 Device Server
The LTNET485 DIN Rail Ethernet-to-Serial Device Server provides a 10/100BaseT interface to the Ethernet and serves as an Ethernet-to-RS485 converter and device server for a mix of up to 31 Laurel meters and transmitters on an RS485 bus. The Ethernet connection is via a standard RJ45 jack. The connection to the RS485 bus can be via an RJ11 jack or via discrete screw terminals. The lines of the RJ11 jack and the screw terminals are wired in parallel.
Priced at only $150, the LTNET485 is a very economical and easy means to interface different types of Laurel transmitters to an Ethernet LAN and to the Internet. The transmitters can be any mix of analog input types (voltage, current, AC, DC, strain gauge, load cell, thermocouple, RTD, ohms) and pulse input types (frequency, rate, totalizing, quadrature position or rate, period, elapsed time, sum, difference or ratio of two inputs).
Laurel transmitters come with RS485 I/O as a standard feature and can be connected to the LTNET485 Device Server using screws terminals and 3 discrete parallel wires (half-duplex RS485) or 5 discrete parallel wires (full-duplex RS485), with no need for a hub. This includes LTA transmitters and LTM transmitters.
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA Tel 714-434-6131 www.laurels.com 1
Laurel meters to be connected to the LTNET485 Device Server need to be equipped with an RS485 option board with dual RJ11 jacks (digital interface ordering option 2). Multiple meters can then be daisy-chained using readily-available commercial 6-wire straight-through data cables (not crossover cables), with no need for a hub.
As an alternative, multiple Laurel meters can be interfaced to a single Ethernet line via an Ethernet-to-RS485 Converter Board in one of the meters. That board offers an RJ11 jack for connection to the RS485 bus as required for meters (like the LTNET485), but not screw terminal connectors as required for Laurel transmitters (unlike the LTNET485). Individual Laurel meters equipped with an Ethernet interface board can also be interfaced to a single Ethernet line.
Discovery and configuration of Ethernet nodes and their connected devices can be achieved by two alternate methods using a PC connected to the same LAN as the Nodes: 1) a Console mode which uses Windows-based Node Manager Software, and 2) a Webserver mode which uses a browser to access the public or private IP address of the node.
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Both methods automatically discover all Nodes on a LAN or WAN, plus any devices connected to each Server Node via an RS485 bus. They are used to configure each Node, such as setting communication parameters, naming the Node and asso­ciated devices, entering email addresses for alarm notification and data requests, selecting the Node's time zone for time­stamping of emails and streaming data, and upgrading firmware. Once configuration data has been stored in flash memory of all Nodes, the PC can be disconnected. Details are in our Ethernet Manual.
Specifications
Serial Data I/O
Supported protocols Ethernet connection Ethernet cable Ethernet compliance Devices per Ethernet line RS485 connection RS485 compliance Devices per RS485 line Data rates to Laurel devices Rates to non-Laurel devices Isolation ESD Protection EMI Immunity EFT Protection Short Circuit Protection
Power Input
Standard Power Low Power Option Power Frequency Power Isolation Power Consumption
Mechanical
Dimensions Mounting Electrical Connections
Environmental
Operating Temperature Storage Temperature Relative Humidity Cooling Requirement
Modbus TCP, Modbus RTU, Modbus ASCII, Laurel ASCII RJ45 jack 10/100Base-T IEEE 802.3 Server Node plus up to 31 Laurel devices on RS485 bus RJ11 jack plus five screw terminals for discrete data wiring. EIA/TIA-485 Up to 31 Laurel meters and transmitters. 300, 600, 1200, 2400, 4800, 9600, 19200 baud Up to 614400 baud 250V rms working, 2.3 kV rms per 1 min test 15 kV per IEC 1000-4-2 10 V/m per IEC 1000-4-3 2 kV per IEC 1000-4-4 Continuous
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
129 x 104 x 22.5 mm case 35 mm rail per DIN EN 50022 Plug-in screw-clamp connectors
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.
Instruments from other manufacturers can be operated on the RS485 bus under control of our LTNET485 Ethernet-to-Serial Device Server if the host computer supplies commands and accepts responses suitable for these instruments.
The LTNET485 mounts on a DIN rail. It looks like a Laurel transmitter, but does not include a signal conditioner board or relays
Pinout
LAUREL
Ordering Guide
Create a model a model number in this format: LTNET485-1
Transmitter Type
Power 1 Isolated 85-264 Vac
LTNET485 Laureate Ethernet-to-Serial
Device Server
2 Isolated 12-32 Vac or 10-48 Vdc
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA Tel 714-434-6131 www.laurels.com 2
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