Home / Products / B&C / Parameter / B&C Electronics BC 7687 Universal controller

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

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)

Applications BC 7687