B6U 2-WIRE UNIVERSAL TEMPERATURE TRANSMITTER

B6U 2-WIRE UNIVERSAL TEMPERATURE TRANSMITTER
(HART communication, intrinsically safe)

Functions & Features
• Universal input: mV, V, T/C, RTD, resistance and potentiometer
• High accuracy
• HART communication
• Intrinsically safe approval
• Programming via hand-held communicator or via PC
• A wide variety of T/C and RTD types
• User’s temperature table can be used
• Self diagnostics
• Input-output isolated

MODEL: B6U–[1][2]

ORDERING INFORMATION
• Code number: B6U-[1][2]
Specify a code from below for each of [1] and [2].
  (e.g. B6U-21).
Use Ordering Information Sheet (No. ESU-7451). Factory
standard setting will be used if not otherwise specified.
Specify the country in which the product is to be used with
the Safety Approval code 2.

[1] SAFETY APPROVAL
0: None
1: FM intrinsically safe
2: IECEx/ATEX intrinsic safety
5: FM nonincendive
7: TIIS intrinsic safety (CE not available)

[2] LCD DISPLAY
0: Without
1: With

RELATED PRODUCTS
• Outdoor enclosure (model: 6BX-E)
• USB interface Bell202 modem (model: COP-HU)
Usable in ‘non-hazardous’ area only.
• Hand-held communicator
• AMS (version 6.0 or higher)
• PC configurator software (model: B6UCFG)
Downloadable at M-System’s web site.

GENERAL SPECIFICATIONS
Electrical connection: M3.5 screw terminals (torque 0.8 N·m)
Materials
Transmitter housing: Flame-resistant resin (black)
Screw terminals: Nickel-plated brass
Isolation: Input to output
Burnout (T/C, RTD, Potentiometer & Resistance): Upscale, downscale or no burnout selectable (standard: upscale);
Also detects wire breakdown and overrange input exceeding the electrical design limit for DC input.
Cold Junction Compensation (thermocouple input): CJC sensor incorporated
User-configurable items:
· Input sensor type
· Number of wires (RTD & resistance)
· Input range
· Inverted output
· Burnout
· Damping time (via HART only, standard: 0)
· Sensor calibration (via HART only)
· Output calibration
· Special linearization data (via HART only)
· HART communication mode

HART COMMUNICATION
Protocol: HART communication protocol
HART address range: 0 – 15 (factory set to 0)
Transmission speed: 1200 bps
Digital current: Approx. 1 mAp-p when communicating
Character format: 1 Start Bit, 8 Data Bits, 1 Odd Parity Bit,
1 Stop Bit
Distance: 1.5 km (0.9 miles)
HART communication mode: Master-Slave Mode and Burst Mode (factory set to Master-Slave)
HART network mode: Point-to-Point Mode and Multi-drop Mode; automatically set to Multi-drop Mode when the address is set to other than 0.

LCD DISPLAY (option)
Features:
· Setting and display of input signals, engineering units and the transmitter operating status, etc.
· Removable while the module is powered.
Display size: 36 × 20 mm (1.42” × 0.79”)
Characters
Color: Black
Format:
• 2 rows of 5 alphanumeric characters:
  Top row: 7.4 mm high;
  Bottom row: 6.5 mm high,
• Status indicators and engineering units
For detail of the LCD panel indication, refer to the instruction manual.   
Display range: -99999 to 99999
Decimal point: In top row
Read rate: 150 msec.
Back light: None

INPUT SPECIFICATIONS
The input type is factory-set to K thermocouple, and the input range to 0 to 100°C.
See Table 1 for the available input type, the minimum span, and the maximum range.
■ DC mV & V
Input resistance: ≥ 1 MΩ
■ Thermocouple
Input resistance: ≥ 1 MΩ
Burnout sensing: 130 nA ±10 %
■ RTD (2-wire, 3-wire or 4-wire)
Input resistance: ≥ 1 MΩ
Allowable leadwire resistance: Max. 20 Ω per wire
■ Resistance (2-wire, 3-wire or 4-wire)
Excitation: 0.2 mA ±10 %
Allowable leadwire resistance: Max. 20 Ω per wire
■ Potentiometer
Excitation: 0.2 mA ±10%
Allowable leadwire resistance: Max. 20 Ω per wire

OUTPUT SPECIFICATIONS
Output range: 4 – 20 mA DC
Operational range: 3.8 – 21.6 mA
Load resistance vs. supply voltage:
Load Resistance (Ω) = (Supply Voltage (V) – 12 (V))
÷ 0.024 (A)      (including leadwire resistance)

INSTALLATION
Supply voltage
 · 12 – 42 V DC (non-approved)
 · 12 – 28 V DC (approved)
Operating temperature: 
 · Non-safety-approved unit: -40 to +85℃ (-40 to 185°F) 
 · Safety-approved unit: See Safety Parameters for use in a hazardous location.
 · LCD display (full visibility): -30 to +80℃ (-22 to 185°F)
Operating humidity: 0 to 95 %RH (non-condensing)
Weight: 150 g (0.33 lb) including the LCD

PERFORMANCE
Accuracy: See Table 1 and ‘Explanations of Terms.’
Cold junction compensation error: ±0.5℃ (±0.9°F)
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F) of max. span at -5 to +55°C [23 to 131°F]
Start-up time: Approx. 8 sec.
Response time: ≤ 2 sec. (0 – 90 %) with damping time
set to 0 and when not communicating via HART.
Supply voltage effect: ±0.003 % × [Output Span] / 1 V
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @1 minute (input to output)
Safety integrity level: Suitable for use in a safety instrumented system up to SIL1 or SIL2 if appropriate safety instructions are observed. Consult M-System.

EXPLANATIONS OF TERMS
■ ACCURACY
This transmitter’s accuracy is t