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Modem ElMetro-808M USB-HART/RS485
HART/RS485-USB modem ElMetro-808М (hereinafter referred to as a “modem”) is intended for communication between a personal computer and smart devices with support of HART and RS-485 interfaces. Such smart devices may include flowmeters, temperature sensors and pressure gauges as well as level meters and other instruments. The modem is compatible with various software (e.g. ElMetro-HART, AMS, FieldCare) and enables to configurate connected devices via HART or RS-485 interface. The modem is equipped with a built-in power supply unit to power external devices without external power supply for the modem itself. The modem is not regarded as a measuring instrument and does not cause additional error to the analog signal measurement.
Device description and working principle:
HART/RS485-USB modem ElMetro-808М could be provided both for a desktop mount (view Pic. 1. Front panel of modem ElMetro-808М) and for a DIN rail mount. Front panel of the modem consists of (view Pic. 1. Front panel of modem ElMetro-808М):
- HART operation modes switch (1):
- HART: the modem is switched to a HART interface operation mode;
- 24 V: the modem is switched to a “HART-modem with power supply” mode.
- RS-485 operation modes switches (2):
- RS-485: the modem is switched to a RS-485 interface operation mode;
- 120 Ohm: matching load is applied.
- Indicators (3):
- USB: power supply via USB port;
- 24 V: “HART-modem with power supply” mode is run;
- Rx: data reception indicator;
- Tx: data transmission indicator. At data transmission or reception during modem operation the indicators “Rx” and “Tx” must flash correspondently.
- Wire with clamps (4).
Operation modes
- “HART modem” operation mode, view Pic. 2. Typical connection circuit of “HART modem” operation mode. In present mode the modem operates as a standard HART modem. Polarity of connection to HART line is optional.
- “HART modem with power supply” operation mode, view Pic. 3. Typical connection circuit of “HART modem with power supply” operation mode. In present mode a built-in 24 V power supply unit is turned on and 250 Ohm internal resistance is applied at HART line. Polarity must be considered when devices are connected to the modem. 24 V± 10%, 25 mA power supply unit could provide simultaneous operation of up to 5 sensors in multipoint mode.
- “RS-485” operation mode, view Pic. 4. Typical connection circuit of “RS-485” operation mode. In present mode the modem is used to connect RS-485 network. Users may switch 120 Ohm load between DATA+ and DATA- lines on or off by means of a “120 Ohm” switch.
Technical characteristics and advantages:
Modem has the following technical characteristics and advantages:
- Two conversion types in one modem: USB-HART and USB-RS485.
- Connection to PC is available; modem could be powered via USB.
- Connected devices could be powered by a built-in power supply unit with overload protection.
- Galvanic isolation between interfaces: 1500 V.
- Built-in load resistance.
- Up to 5 sensors could be powered simultaneously in multipoint mode.
- 4 LED operation indication.
- Compatible with various software: ElMetro-HART, AMS, FieldCare.
- Drivers are supplied for different operating systems like Windows, Linux, MAC OS X.
- Ingress Protection Rating: IP30.
- Ambient temperature: from -20 to 50 °С.
- Desktop and DIN rail mount are available.
- Configuration software “Fuji HART Explorer” is supplied with the modem.
- Guarantee commitment: 2 years.
- Weight: not more than 0.5 kg.
- Overall dimension in mm: 1005*66*30.
Supply package:
- standard supply package: HART/RS485-USB modem ElMetro-808М (1 pc.); product certificate (1 pc.); USB cable for connecting modem to PC (1 pc.); a set of wires with clamps (1 pc.); CD with software (1 pc.).
Application:
Modem is applied to convert signals of the following instruments of ElMetro-Engineering LLC production: multiparameter Coriolis flowmeter ElMetro-Flomac, ultrasonic gas flowmeter ElMetro-DRU, portable pressure calibrator ElMetro-Pascal-02 and etc.
Customers’ feedbacks:
To view customers’ feedbacks on products of ElMetro-Engineering LLC, please, follow the link.
To make enquiry and get a commercial offer on modems ElMetro-808M of the Russian manufacturer ElMetro-Engineering LLC, please, send us product order code (view full catalogue) to e-mail: info@elmetro.ru or contact us via tel.: +7 (351) 220-06-01. To discuss technical questions, please, refer to technical support tel.: +7 (351) 220-06-03.