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

B3HU2

Space-saving Two-wire Signal
Conditioners B3-UNIT

2-WIRE UNIVERSAL TEMPERATURE TRANSMITTER
(HART communication, low temp. drift)

Functions & Features
• Universal input: Voltage, T/C, RTD and resistance
• High accuracy
• HART communication
• 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: B3HU2–0[1]

ORDERING INFORMATION
• Code number: B3HU2-0[1]
Specify a code from below for [1].
  (e.g. B3HU2-0/Q)
• Specify the specification for option code /Q
  (e.g. /C01/SET)

SAFETY APPROVAL
0: None

[1] OPTIONS
blank: none
/Q: With options (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating
EX-FACTORY SETTING
/SET: Preset according to the Ordering Information Sheet
 (No. ESU-7501)

RELATED PRODUCTS
• USB interface Bell202 modem (model: COP-HU)
• PC configurator software (model: B3HU2CFG)

GENERAL SPECIFICATIONS
Construction: Stand-alone; terminal access at the front
Degree of protection: IP20
Connection: Euro type connector terminal
(applicable wire size: 0.2 to 2.5 mm2, stripped length 8 mm)
Housing material: Flame-resistant resin (gray)
Isolation: Input to output
Cold Junction Compensation: CJC sensor incorporated
Self diagnostics: Detects internal error, burnout
User-configurable items: PC and the transmitter are connected with the COP-HU.
· Input sensor type
· Input range
· Burnout
· Output limits (Upper / Lower)
· Damping time (factory set to 0)
· Linearization
· Output calibration
· Loop test output

HART COMMUNICATION
Protocol: HART communication protocol
HART version: 7
HART address range: 0 – 63 (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.

INPUT SPECIFICATIONS
The input is factory set for use with K thermocouple, single input, 0 to 100°C, internal CJC sensor.
See Table 1 for the available input type, the minimum span and the maximum range.
Voltage
Input resistance: ≥ 1 MΩ
Thermocouple (dual input available)
Input resistance:
≥ 1 MΩ
RTD (2-wire, 3-wire or 4-wire)
Input resistance:
≥ 1 MΩ
Excitation: ≤ 0.25 mA
Allowable leadwire resistance: Max. 10 Ω per wire
Resistance (2-wire, 3-wire or 4-wire)
Input resistance:
≥ 1 MΩ
Excitation: 0.25 mA
Allowable leadwire resistance: Max. 10 Ω per wire

OUTPUT SPECIFICATIONS
Output range: 4 – 20 mA DC
Operational range: 3.75 – 23 mA
Load resistance vs. supply voltage:
Load Resistance (Ω) = (Supply Voltage (V) – 9 (V)) ÷ 0.023 (A)  (including leadwire resistance)
Burnout: 3.75 – 3.8 mA or 21.5 – 23 mA
(factory set to 23 mA)
Upper output limit proportional to the input:
20 – 21.5 mA (factory set to 21.5 mA)
Lower output limit proportional to the input:
3.8 – 4 mA (factory set to 3.8 mA)
Update time: 440 msec. (660 msec. with dual input)
Output characteristics for dual input:
Average or Differential selectable

INSTALLATION
Supply voltage
DC: 9 – 35 V DC
Operating temperature: -40 to +85°C (-40 to +185°F)
Operating humidity: 0 to 95 %RH (non-condensing)
Mounting: DIN rail
Weight: 80 g (2.8 oz)

PERFORMANCE
Accuracy: As indicated in Table 1*1, ±0.075 % of span
or ±0.075 % of max. range*2, whichever is the greatest.
Add the CJC error for T/C input.
*1: max. range = 0 % or 100 % input setting value, absolute value of whichever is greater.
(e.g. 100℃ for -10 to +100℃, 200℃ for -200 to +50℃)
Cold junction compensation error (thermocouple input):
±1.0°C (±1.8°F)
Temp. coefficient: 0.0075 %/°C (0.004 %/°F) of max. range
Response time: ≤ 1 sec. (0 – 90 %) or ≤ 2 sec. (4-wire RTD,
4-wire resistance or dual input T/C; 0 – 90 %) with damping time set to 0
Supply voltage effect: ±0.01 % of span/V
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @1 minute (input to output)

STANDARDS & APPROVALS
EU conformity:
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
RoHS Directive
  EN 50581

INPUT TYPE, RANGE & ACCURACY

DIMENSIONS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.