·Some details are not shown. Please refer to specification sheets for all information.

B6U

Field-mounted Two-wire Signal Conditioners
B6-UNIT

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
・Specify code number: B6U-[1][2]
Specify a code from below for each [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:
· Indicates and setts input signal, engineering unit and transmitter status.
· Removable while the module is powered.
Display size: 36 × 20 mm (1.41” × 0.79”)
Characters
Color: Black
Format: 2 rows of 5 alphanumeric characters;
  Top: 7.4 mm high
  Bottom: 6.5 mm high
  6 status characters, 1.9 mm high
Display range: -99999 to 99999
Decimal point: In top row
Read rate: 150 msec.
Back light: None

INPUT SPECIFICATIONS
The input is factory set for use with K thermocouple, 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
Excitation: 0.2 mA ±10 %
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: -40 to +85°C (-40 to 185°F) Electronics
(See Safety Parameters for use in a hazardous location.)
-30 to +80°C (-22 to 185°F) Display (full visibility)
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°C or ±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 theoretically defined as the addition of A/D and D/A conversion errors:

  Accuracy = A/D Conversion Error + D/A Conversion Error

The A/D conversion error means that measured as HART signal which is A/D converted from the analog input signal.
The D/A conversion error of this transmitter is relatively very small so that it does not really affect the unit’s overall performance.
The “Accuracies” given in Table 1 therefore equals the A/D conversion error.
The temperature drift (coefficient) or the cold junction compensation error is not included in the “Accuracy.”
CALCULATION EXAMPLES OF OVERALL ACCURACY IN %
DC Voltage
1) 0 – 200 mV
Absolute value accuracy (Table 1): 40 μV
40 μV ÷ 200000 μV × 100 = 0.02 % < 0.1 %
➠ Overall accuracy = ±0.1% of span
2) 0 – 4 mV
Absolute value accuracy (Table 1): 10 μV
10 μV ÷ 4000 μV × 100 = 0.25 % > 0.1%
➠ Overall accuracy = ±0.25 % of span
Thermocouple
1) K thermocouple, 0 – 1000°C
Absolute value accuracy (Table 1): 0.25°C
0.1% × 1000°C = 1°C > 0.25°C
CJC error (0.5°C) added: 1 + 0.5 = 1.5°C
1.5°C ÷ 1000°C × 100 = 0.15 %
➠ Overall accuracy including CJC error = ±0.15 % of span
2) K thermocouple, 50 – 150°C
Absolute value accuracy (Table 1): 0.25°C
0.1 % × (150 – 50)°C = 0.1°C < 0.25°C
CJC error (0.5°C) added: 0.25 + 0.5 = 0.75°C
0.75°C ÷ (150 – 50)°C × 100 = 0.75 %
➠ Overall accuracy including CJC error = ±0.75 % of span
RTD
1) Pt 100, -200 – 800°C
Absolute value accuracy (Table 1): 0.15°C
0.15°C ÷ (800 – -200)°C × 100 = 0.015 % < 0.1 %
➠ Overall accuracy = ±0.1 % of span
2) Pt 100, 0 – 100°C
Absolute value accuracy (Table 1): 0.15°C
0.15°C ÷ 100°C × 100 = 0.15 % > 0.1 %
➠ Overall accuracy = ±0.15 % of span

STANDARDS & APPROVALS
Refer to the manuals to comply with the standards.
EU conformity:
ATEX Directive 
  Ex ia EN 60079-11 (for ATEX intrinsic safety)
  Ex d EN 60079-1 (for ATEX flameproof)
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
RoHS Directive
  EN 50581
Safety approval:
FM: Intrinsically safe
  Class I, Division 1, Groups A, B, C and D
  Class I, Zone 0, AEx ia IIC
  T4, T5 and T6
  (Class 3600)
  (Class 3610)
  (ANSI/ISA 60079-0)
  (ANSI/ISA 60079-11)
FM: Nonincendive
  Class I, Division 2, Groups A, B, C, and D
  Class I, Zone 2, Group IIC
  T4, T5 and T6
  (Class 3600)
  (Class 3611)
IECEx intrinsic safety
 EX ia IIC T4, T5 and T6 Ga
 (IEC 60079-0)
 (IEC 60079-11)
TIIS: Intrinsic safety
  Ex ia IIC T5 X

Functional safety
  (IEC 61508-1)
  (IEC 61508-2)
  (IEC 61511-1)

SAFETY PARAMETERS
Operating temperature
For IECEx, ATEX and FM:
  T4: -40 to +80°C
  T5: -40 to +65°C
  T6: -40 to +50°C
For TIIS:
  T5: -20 to +60°C
Ex-data:
• Output circuit
  Ui (Vmax): 30 V
  Ii (Imax): 96 mA
  Pi (Pmax): 720 mW
  Ci: 0 μF (TIIS Intrinsic Safety: ‘Negligible value')
  Li: 0 mH (TIIS Intrinsic Safety: ‘Negligible value')
• Sensor circuit
  Uo (Voc): 6.4 V (TIIS Intrinsic Safety: 6.0 V)
  Io (Isc): 30 mA
  Po: 48 mW
  Co (Ca): 20 μF
  Lo (La): 10 mH

INPUT TYPE, RANGE & ACCURACY

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

MOUNTING REQUIREMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.