Endress+Hauser L20221 Brief Operating Instructions

Temperature transmitter with 4-20 ma analog output, with hart communication

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KA01630O/09/EN/02.24-00

71683048

2024-10-30

Brief Operating Instructions

L20221, L20222

Temperature transmitter

L20221 with 4-20 mA analog output

L20222 with HART® communication

These are Brief Operating Instructions; they do not replace the

Operating Instructions included in the scope of supply.

Detailed information can be found in the Operating

Instructions and the additional documentation.

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Summary of Contents for Endress+Hauser L20221

Page 1 2024-10-30 Brief Operating Instructions L20221, L20222 Temperature transmitter L20221 with 4-20 mA analog output L20222 with HART® communication These are Brief Operating Instructions; they do not replace the Operating Instructions included in the scope of supply. Detailed information can be found in the Operating...
Page 2 Table of contents L20221, L20222 Table of contents About this document ............. . 2 Document function .
Page 3 L20221, L20222 About this document Instructions. The installation specifications, connection data and safety instructions contained therein must be strictly observed. Make sure that you use the right Ex-specific documentation for the right device with approval for use in hazardous areas.
Page 4 Basic safety instructions L20221, L20222 1.3.3 Symbols for certain types of information Symbol Meaning Symbol Meaning Permitted Preferred Procedures, processes or actions that Procedures, processes or actions that are permitted. are preferred. Forbidden Procedures, processes or actions that Indicates additional information.
Page 5 L20221, L20222 Basic safety instructions ‣ Before beginning work, the specialist staff must have read and understood the instructions in the manuals and supplementary documentation as well as in the certificates (depending on the application). ‣ They must follow instructions and comply with general policies.
Page 6 Incoming acceptance and product identification L20221, L20222 Product safety This measuring device is designed in accordance with good engineering practice to meet state- of-the-art safety requirements, has been tested, and left the factory in a condition in which it is safe to operate.
Page 7 L20221, L20222 Installation 3.2.2 Name and address of manufacturer Name of manufacturer: Endress+Hauser Wetzer GmbH + Co. KG Address of manufacturer: Obere Wank 1, D-87484 Nesselwang Storage and transport Storage temperature Head transmitter –50 to +100 °C (–58 to +212 °F) DIN rail transmitter –50 to +100 °C (–58 to +212 °F)
Page 8 Installation L20221, L20222 4.1.2 Important ambient conditions Ambient temperature range –40 to +85 °C (–40 to 185 °F). Operating altitude Up to 4 000 m (13 123 ft) above sea level. Overvoltage category Pollution degree Protection class Condensation Condensation as per IEC 60068-2-33 permitted for head transmitter, not...
Page 9 L20221, L20222 Installation 4.2.1 Mounting the head transmitter . 7 2 i n ) . 7 2 i n ) A0048481  1 Head transmitter mounting (three versions) Procedure for mounting in a terminal head, pos. A: Open the terminal head cover (8) on the terminal head.
Page 10 Installation L20221, L20222 21 mm (0.83 in) . 7 2 i n ) 6.5 mm (0.25 in) . 5 1 i n ) A0024604  2 Dimensions of angle bracket for wall mount (complete wall mounting set available as accessory) Procedure for mounting in a field housing, pos.
Page 11 L20221, L20222 Installation Mounting for North America PZ 2 PZ 1 A0008520  3 Head transmitter mounting Thermometer design with thermocouples or RTD sensors and head transmitter: Fit the thermowell (1) on the process pipe or the container wall. Secure the thermowell according to the instructions before the process pressure is applied.
Page 12 Electrical connection L20221, L20222 4.2.2 Mounting the DIN rail transmitter NOTICE Wrong orientation Measurement deviates from the maximum measurement accuracy when a thermocouple is connected and the internal reference junction is used. ‣ Mount the device vertically and ensure it is correctly oriented.
Page 13 L20221, L20222 Electrical connection NOTICE Do not overtighten the screw terminals, as this could damage the transmitter. ‣ Maximum torque = 0.35 Nm (¹⁄₄ lbf ft), screwdriver: Pozidriv PZ1. Connection requirements A Phillips head screwdriver is required to wire the head transmitter with screw terminals. A flat-blade screwdriver must be used for the DIN rail transmitter version with screw terminals.
Page 14 Electrical connection L20221, L20222 Quick wiring guide A0047635  5 Assignment of terminal connections for head transmitter Sensor input, TC and mV, external reference junction (CJ), Pt100 Sensor input, TC and mV, internal reference junction (CJ) Sensor input, RTD and Ω, 4-, 3- and 2-wire...
Page 15 L20221, L20222 Electrical connection An unshielded installation cable is sufficient for using the analog signal. In case of increased EMC influences, the use of shielded cables is recommended. For the DIN rail transmitter, a shielded cable must be used for sensor cable lengths of 30 m (98.4 ft) or more.
Page 16 Electrical connection L20221, L20222 Pull the wire gently to ensure it is connected correctly. Repeat starting from step 1 if necessary. Fig. B, fine-strand wire without ferrule: Strip wire end. Minimum stripping length 10 mm (0.39 in). Press down on the lever opener.
Page 17 L20221, L20222 Electrical connection 2- 1+ 2- 1+ A0039698  8 Connecting the signal cables and power supply Head transmitter installed in field housing Head transmitter installed in terminal head DIN rail transmitter mounted on DIN rail Terminals for power supply...
Page 18 Electrical connection L20221, L20222 A0037914  9 Fitting the CDI connector of the configuration kit for configuration, visualization and maintenance of the head transmitter via PC and configuration software Configuration kit with USB port CDI connector Installed head transmitter with CDI interface...
Page 19 L20221, L20222 Operation options Post-connection check Device condition and specifications Notes Is the device or cable undamaged (visual check)? Electrical connection Notes Does the supply voltage match the specifications on the • Head transmitter: U = 10 to 36 V nameplate? •...
Page 20 Operation options L20221, L20222 Display elements Head transmitter A0008549  12 Optional LC display for head transmitter Item no. Function Description Displays the TAG TAG, 32 characters long. ' C ommunication' symbol The communication symbol appears when read and write-accessing via the fieldbus protocol.
Page 21 L20221, L20222 Operation options DIN rail transmitter Two LEDs on the front indicate the device status. Type Function and characteristic Status LED (red) When the device is operating without errors, the device status is displayed. This function can no longer be guaranteed in the event of an error.
Page 22 Operation options L20221, L20222 Switching write protection on/off Write protection is switched on and off via a DIP switch on the rear of the optional attachable display. When write protection is active, parameters cannot be modified. A lock symbol on the display indicates that write protection is on.
Page 23 L20221, L20222 Commissioning Download the FDC app: Install and start the FDC app.  A Live List shows all the devices available. Select the device from the Live List.  The Login dialog box opens. Logging in: Enter the user name: admin Enter the initial password: serial number of the device.
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