ES-7451 Rev.23
B6U
Field-mounted Two-wire Signal Conditioners
B6-UNIT SERIES
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
• Functional safety 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 (functional safety not available)
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 our web site.
• LCD display (model: B6U-LCD) (non safety approval)
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 +176°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 us.
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
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
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
(SIL 1 @ IEC 61508-1, -2)
(SIL 2 @ IEC 61511-1)
* Safety approval code "0" is not applicable.
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