343 Temperature Transmitters Model 343 Smart Temperature Transmitter Introduction Features & Benefits Microprocessor based two-wire transmitter with automatic cold-junction compensation ensures accurate, reliable performance over a wide operating range Single model accepts multiple input types, simplifying specification and reducing spare part requirements High accuracy, typically 0.05% of reading, guarantees process control integrity HART® communication allows quick, easy configuration, saving valuable time and money Input/output isolation supports the use of grounded or ungrounded sensors DIN rail and field-mountable versions allow maximum design flexibility Description 4 The Model 343 Temperature Transmitter incorporates microprocessor-based electronics and advanced temperature measurement circuitry into a small economical package that accepts a wide range of input types and ranges. There are two different versions of the 343. The Model 343D is a DIN rail (to EN 50022) version suitable for mounting in rack-type enclosures. The Model 343F is a field-mountable, explosion-proof version packaged in an aluminum enclosure suitable for mounting directly at the point of process control. The Model 343F is small and lightweight, allowing it to be directly mounted to a thermowell in applications where this is feasible. Both the 343D and 343F use the same electronics module, thereby reducing spare parts inventory. The 2, 3, and 4-wire RTDs, T/Cs, mV, and ohm sensors can be used as the sensor element. See Table 1 for a complete list of sensor types. The transmitter has break detection circuitry on each input terminal. Upon sensing a break in the primary element leadwire, the transmitter output will fail-safe based upon user-defined units. Thermocouple cold junction compensation is performed automatically using an internal sensor or external two-wire RTD. 4.48 The transmitter output range can be set in engineering units anywhere within the operating range for the input sensor type. There is no minimum or maximum span limitation. The Model 343 can install one of two local indicators. The LCD Display is a simple 4-1/2 digit display. The SmartDisplayTM indicates in °C or °F, but also contains a second line of display and integral push-buttons that are used to configure the transmitter. The Model 343 uses the HART communications protocol. This ensures that it will work with any HART product available today, including the Moore 275 HART Communicator, PC-based maintenance software packages, and distributed control systems. HART also provides multi-dropping capability where up to 15 transmitters can be connected on a single twisted pair conductor. Multi-drop networks minimize cost considerably and are especially useful in tank gauging and temperature measurement. 343 Temperature Transmitters Model 343 Smart Temperature Transmitter Technical data Specifications Functional Specifications Performance Specifications Update Rate Digital Input Accuracy 150 ms ±0.05% of the equivalent millivolt or ohm reading, or the accuracy shown in Table 1, whichever is greater. Input/Output Isolation Cold Junction Measurement Accuracy ±0.5°C (±0.9°F) D/A Output Conversion Accuracy ±0.05% of span Total Accuracy [(Input Accuracy)2 + (Cold Junction Accuracy)2+ (D/A Accuracy)2] 250 Vac/800 Vdc Humidity 5 to 100% RH Damping Adjustable from 0 to 32 seconds Fail-safe Current User-selectable between low (3.6mA), high (23mA) or off. Power Supply Ambient Temperature Range 12-42 Vdc Electronics: -40 to 85°C (-40 to 185°F) Display: -20 to 70°C (-4 to 158°F) Hazardous Area Classification /Approvals Stability Less than 0.05% of reading ±3.6 mA for 12 months Power Supply Effect ±0.005% of span per volt EMI/RFI Susceptibility Less than 0.5% of reading at 10V/m, 20KHz-1000MHz Mechanical Specifications Din Rail (343D) CE Approved 4 FM/CSA Intrinsically Safe: Class I, Division 1, Groups A, B, C & D Class II, Division 1, Groups E, F & G Class III, Division 1 Explosion Proof: Class I, Division 1, Groups B, C & D Class II, Division 1, Groups E, F & G Class III, Division 1 Non-Incendive: Class I, Division 2, Groups A, B, C & D Housing Plastic Electrical Connections 1650 Weight 4 oz. Dimensions See Installation Drawing Field-Mountable Enclosure (343F) Housing Epoxy coated cast aluminum, IP66/68 Electrical Connections Quantity of 2 conduit entrances; 1/4" - 1/2" NPT Screw Terminals for 10-26 AWG Weight Network Resistance (OHMS) Screw Terminals for 10-26 AWG 1200 1100 1000 800 600 500 OPERATING REGION 250 0 0 10V 12V 17V 20V 24V 30V 34V 40V 42V 45V Minimum Power Supply Voltage (VDC) 2.7 lb. (1.2 kg) Dimensions See Installation Drawing 4.49 343 Temperature Transmitters Model 343 Smart Temperature Transmitter Technical data Table 1 Input Sensor Types & Accuracy SENSOR INPUT ACCURACY1 INPUT RANGE °C °F RTD - 2,3,4-Wire 100Ω Pt DIN α = 0.00385 -200 to 850 -328 to 1562 ±0.14°C -200 to 650 -328 to 1202 ±0.14°C 120Ω Ni -80 to 320 -112 to 608 ±0.14°C 100Ω Ni -60 to 250 -76 to 482 ±0.14°C 10Ω Cu -70 to 150 -94 to 302 ±0.14°C 100Ω Pt SAMA α = 0.003902 Thermocouples 4 Type B NBS 43 to 1800 109 to 3272 ±0.8°C (1.5°F) Type C NBS 0 to 2320 32 to 4208 ±0.8°C (1.5°F) Type E NBS -270 to 1000 -454 to 1832 ±0.3°C (0.5°F) Type J NBS -210 to 1200 -346 to 2192 ±0.3°C (0.5°F) Type K NBS -270 to 1372 -454 to 2502 ±0.3°C (0.5°F) Type L NBS -200 to 900 -328 to 1652 ±0.3°C (0.5°F) Type N NBS 270 to 1300 518 to 2372 ±0.3°C (0.5°F) Type R NBS 50 to 1768 122 to 3214 ±0.8°C (1.5°F) Type S NBS -50 to 1768 -58 to 3214 ±0.8°C (1.5°F) Type T NBS -270 to 400 -454 to 752 ±0.3°C (0.5°F) Type U NBS -200 to 600 -328 to 1112 ±0.8°C (1.5°F) Millivolt mV -15 to 115 mV ±0.01 mV Ohm Input ohm 0 to 500Ω 1) Accuracy includes the effects of linearity, repeatability, hysteresis and ambient temperature. 4.50 ±0.06Ω 343 Temperature Transmitters Model 343 Smart Temperature Transmitter Ordering data Model Number DIN Rail Transmitter Field-Mount Transmitter Output • 4-20 mA, Smart Transmitter w/HART Protocol Local Indicator • Not Required • LCD Display1 • SmartDisplay2 Standard Options • None • Special Features (Please Describe) Mounting Bracket • Not Required • 2" Pipe Mount w/SS Hardware3 • Universal Mount w/SS Hardware3 • 2" Pipe Mount all SS3 • DIN-Rail Clip4 Housing • Not Required4 • Aluminum 1/2" NPT3 • Aluminum M20 x 1.53 Hazardous Area Approvals • FM/CSA & ABS Type Approved • CENELEC EEx ia • CENELEC EX N • CENELEC EEx d • Not Required • FM/CSA I.S. only (34D only) Installation Drawings Order No. 343D343F■ ■ ■ ■ -■ ■ ▲▲▲▲ ▲▲ 2.35 (59.7) Dia. A 1 N 1 5 4 2.13 (54.1) - + Front View N Y 2.95 (75.0) 1.93 (49.0) N 1 2 3 5 Dimensions are in inches (millimeters) N 1 2 3 8 9 M N P 4 Side View Model 343D Dimensions (Shown with LCD Display Module) Model 343D Dimensions (Shown with LCD Display Module) Model 343F Dimensions 1) No indication of engineering units. 2) Indicates engineering units & includes push-buttons for local operation. 3) Model 343F Only. 4) Model 343D Only. 4.51