Description
Application
- Linearised temperature measurement with PT100/1000, Ni100/1000, or Thermocouple sensor.
- Difference or average temperature measurement of 2 resistance or Thermocouple sensors.
- Conversion of linear resistance variation to a standard analogue current signal, for instance from valves or Ohmic level sensors.
- Amplification of a bipolar mV signal to a standard 4-20 mA current signal.
- Connection of up to 63 transmitters can be connected in a multidrop cummincation setup (HART 7)
Features
- RTD, TC, Ohm, or mV input
- Extremely high measurement accuracy
- HART® communication
- Galvanic isolation
- 1- or 2-channel version
- 6335D can be installed in EX zone 0
HART Protocol
The HART protocol provides a uniquely backward compatible solution for instrument communication as both 4-20 mA analog and digital communication signals are transmitted simultaneously on the same wiring. The Loop Link Programming Kit can configure the individual transmitters for multidrop mode and provide it with a unique polling address. The HART protocol revisions can be changed by user configuration to either the HART 5 or HART 7 protocl. HART provides many benefits promised by fieldbus, while retaining the compatibility and familiarity of existing 4-20mA systems.
HART® 7 protocol offers:
- Long tag supported (up to 32 characters).
- Enhanced Burst Mode and Event Notification with time stamping possibillity.
- Device variables with status, can be mapped individually to any dynamic variable PV, SV, TV or QV.
- Measuring of trending in the process signal.
- Automatic event notification with time stamps.
- Command aggregation for higher communication efficiency.
Options
Type | Version | Galvanic Isolation | Channels |
6337 | A: Standard D: ATEX |
2: 1,500 VAC | A: Single B: Double |
If required, Omni Instruments will program a 6337 to your specific requirements. Please contact us for details.