Rosemount 644H Temperature Transmitters - …

1 Quick Start Guide00825-0300-4728, Rev CASeptember 2016 Rosemount 644h temperature transmitters with PROFIBUS PA Page 1 Tuesday, September 13, 2016 4:22 PMSeptember 20162 Quick Start GuideNOTICEThis guide provides basic guidelines for the Rosemount 644. It does not provide instructions for detailed configuration, diagnostics, maintenance, service, troubleshooting, or installation. Refer to the Rosemount 644 Reference Manual for more instruction. The manual and this guide are also available electronically on could result in death or serious of this transmitter in an explosive environment must be in accordance with the appropriate local, national, and international standards, codes, and practices.

2 Review the approvals section of the Rosemount 644 Reference Manual for any restrictions associated with a safe an Explosion-proof/Flameproof installation, do not remove the transmitter covers when power is applied to the unit. Process leaks may cause harm or result in death. Install and tighten thermowells or sensors before applying pressure. Do not remove the thermowell while in operation. Electrical shock can result in death or serious injury. Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical the transmitter .

3 3 Wire and apply power .. 4 Verify tagging .. 8 transmitter configuration .. 8 Product Certifications .. Page 2 Tuesday, September 13, 2016 4:22 PMQuick Start Guide3 September Mount the transmitterMount the transmitter at a high point in the conduit run to prevent moisture from draining into the transmitter Typical connection head installationHead mount transmitter with DIN plate style sensor1. Attach the thermowell to the pipe or process container wall. Install and tighten the thermowell before applying process Assemble the transmitter to the sensor.

4 Push the transmitter mounting screws through the sensor mounting plate and insert the snap rings (optional) into the transmitter mounting screw Wire the sensor to the transmitter (see transmitter configuration on page 8 ).4. Insert the transmitter -sensor assembly into the connection head. Thread the transmitter mounting screw into the connection head mounting holes. Assemble the extension to the connection head. Insert the assembly into the Slip the shielded cable though the cable Attach a cable gland into the shielded Insert the shielded cable leads into the connection head through the cable entry.

5 Connect and tighten the cable Connect the shielded power cable leads to the transmitter power terminals. Avoid contact with sensor leads and sensor Install and tighten the connection head cover. Enclosure covers must be fully engaged to meet explosion-proof Typical universal head installationHead mount transmitter with threaded sensor1. Attach the thermowell to the pipe or process container wall. Install and tighten thermowells before applying process Attach necessary extension nipples and adapters to the thermowell. Seal the nipple and adapter threads with silicone Screw the sensor into the thermowell.

6 Install drain seals if required for severe environments or to satisfy code Rosemount 644H TransmitterB. Connection headC. ThermowellD. transmitter mounting screwsE. Integral mount sensor with flying leadsF. E x t e n s i o Page 3 Tuesday, September 13, 2016 4:22 PMSeptember 20164 Quick Start Guide4. Pull the sensor wiring leads through the universal head and transmitter . Mount the transmitter in the universal head by threading the transmitter mounting screws into the universal head mounting Mount the transmitter -sensor assembly into the thermowell. Seal adapter threads with silicone Install conduit for field wiring to the conduit entry of the universal head.

7 Seal conduit threads with PTFE Pull the field wiring leads through the conduit into the universal head. Attach the sensor and power leads to the transmitter . Avoid contact with other Install and tighten the universal head cover. Enclosure covers must be fully engaged to meet explosion-proof Wire and apply power Wiring diagrams are located inside the terminal block cover and on the transmitter top label. An external power supply is required to power a PROFIBUS segment. The power required across the transmitter power terminals is 9 to 32 VDC (the power terminals are rated to 32 VDC).

8 To prevent damaging the transmitter , do not allow terminal voltage to drop below 9 VDC when changing the configuration parameters. Power filterA PROFIBUS segment requires a power conditioner to isolate the power supply filter and decouple the segment from other segments attached to the same power Power the transmitter1. Remove the terminal block cover (if applicable).2. Connect the power lead to the power terminals (The Rosemount 644 power terminals are polarity insensitive for the PROFIBUS protocol.).3. Tighten the terminal screws. When tightening the sensor and power wires, the max torque is 6 in-lb.

9 ( N-m).4. Reattach and tighten the cover (if applicable). thermowellB. Standard extensionC. Threaded style sensorD. Universal head ( transmitter inside)E. Conduit Page 4 Tuesday, September 13, 2016 4:22 PMQuick Start Guide5 September 20165. Apply power (9 32 VDC).A. Sensor terminalsB. Communication terminalsC. Power terminalsFigure 1. Sensor Connections1. Emerson Process Management provides 4-wire sensors for all single element RTDs. Use these RTDs in 3-wire configurations by leaving the unneeded leads disconnected and insulated with electrical The Transmitters must be configured for at least a 3-wire RTD in order to recognize an RTD with a compensation 2.

10 Typical Configuration for PROFIBUS NetworkingA. PROFIBUS DP (RS-485 up to 12 MBd)B. PROFIBUS Class 2 Master (configuration tool)C. DP/PA couplerD. PROFIBUS transmitterE. Power/signal wiringF. PROFIBUS PA (MBP-IS at KBd)G. Terminators (depending on cable characteristics), 6234 ft. (1900 m) max1 2 3 4 ABC2-wire RTD and 3-wireRTD(1) and 4-wire RTD(2)and T/C and Page 5 Tuesday, September 13, 2016 4:22 PMSeptember 20166 Quick Start GuideNote Each segment in a PROFIBUS trunk must be terminated at both ends. Some DP/PA couplers contain the power supply, one terminator, and the power conditioner within the coupling device.