B&C Electronics BC 7687 Universal controller

The instrument is used when there is a need to add display

functions, control, alarm, and / or automatic cleaning of the
sensor to a transmitter capable of performing any type of
measurement.
The instrument provides:
- measuring display in the selectable range from -9999 to 9999, corresponding to the 0-20 mA or 4-20 mA input;
- Vdc power to power the 4-20 mA loop of the transmitter;
- automatic measurement control function
- alarm from the low/high measurement, the set point overtime operation and the logic input;
- programmable dual analog output for recording and acquisition of the measurement values or PID regulation;
- hold / alarm function activated by two external volt free contacts
- automatic /manual autoclean function.
This unit allows a differential measurement, by using two 0-20 mA or 4-20 mA transmitters featuring the same measurement scale.
FeaturesTechnical DataApplications

Specifications

  • Display: multi-line graphic
  • Input from:  0-20 or 4-20 mA single or differential
    • Scale: – 9999 / +9999 with selectable decimal point
    • Measuring unit: selectable and 4 digit configurable
  • 2 set-point with min/max function, hysteresys and delay time programmable
  • Analog output: 0-20 or 4-20 mA isolated for PID regulation or measure transmission
  • Min/max alarm relay, activate/deactivate function selectable
  • Parameters configuration on two levels with access code selected by the operator
  • Two logic digital input for hold or alarm function, selectable
  • Power supply: 85/264 Vac – 50/60 Hz,  5 VA
  • Enclosure: metallic, IP 65 frontal protection
  • Dimensions: 98x98x104 mm (90x90x95 mm back)
  • Registered design: 002564666-003
Inputs: 4-20 mA, 0-20 mA active or passive
single or differentia
Power supply for passive transmitters: 24Vdc (50 mA max)
Zero: ± 10 %
Sensitivity: 12.5 % ÷ 250 %
Resolution: 1 digit
Accuracy: 0.2 %
Repeatability: 0.1 %
Non-linearity: 0.1 %
Dual filter software: 0.4 ÷ 50.0 seconds for small and large variations
Dual analog output: 0-20 mA / 4-20 mA Rmax 600 Ω
Dual set points HI/LO: ON/OFF – PID – PFM – PWM, SPST relays
Hysteresis: 0 ÷ 1.40 pH, 0 ÷ 200 mV
Delay: 0 ÷ 100.0 seconds
Alarm: SPDT relay with delay 0 ÷ 100.0 seconds
Cleaning function: off / autoclean / manual, relay SPDT
repetition time 0.1 ÷ 100.0 hours
cleaning time 1.0 ÷ 60.0 seconds
holding time 0.0 ÷20.0 minutes
SPST and SPDT relay contacts: 220V – 5 A resistive load
Operating temperature: -10 ÷ 60 °C
Humidity: 95% without condensation
Power supply: 85 ÷ 264Vac – 50/60 Hz
9 ÷ 36Vdc, 12 ÷ 24Vac (option 091.42x
Terminal blocks: removable
Weight: 1360 g (BC 6587)
450 g (BC 7687)
Enclosure: ABS, IP 65 protection (BC 6587)
Metallic, IP 65 front panel only (BC 7687)
Dimensions: 256x230x89 mm (BC 6587)
98x98x104 mm, 90x90x95 mm panel cutout (BC 7687)
EMC/RFI conformity: EN 61326
Registered design: 002564666-002 (BC 6587)
002564666-003 (BC 7687)