Page 232 - Bürkert

Technical Data (continued)
Without Fieldbus communication
Power supply 24 VDC
Residual ripple with DC 10%
Voltage tolerance ±10 %
Power consumption < 2 W
8685 / 8686
Output Max. 100 mA per output/ short-circuit protected
Electrical connection
Multipole M12 (8-pin)
2
Cable gland M12x1.5 (cable Ø6.5 mm), screw terminals (1.0 mm / max. port cross-section 0.25 mm 2)

Type 8685 / 8686 2G II Ex ia IIC T4 Gb
Ignition protection IIG Ex ia IIC T4 Gb (BVS 13 ATEX E 039 X)
Ex ia IIC T4 Gb (IECEx BVS 13.0047 X)
Operating conditions Medium temperature of adapted process valve Type 2036
T(media) : 0-130 °C (safety requirement value)
Power supply
Limit switches Operates with Ex i-NAMUR switch amplifier: 8.2V DC
1)
Operates with Ex barrier : max. input voltage Ui < 12V DC
Pilot valve Control valve component for Ex valve coils 2)
Limit switches- Status Only electrical feedback
Power consumption Operates with Ex i-NAMUR- switch amplifier:
< 1.2 mA (terminal position reached)
> 2.1 mA (terminal position not reached)
1)
Operates with Ex barrier : max. input voltage Ii < 50 mA
Electrical connection Cable gland M12x1.5 (cable- 6.5 mm),
2
2
screw terminals 1.0 mm /max. port cross-section: 8685: 0.25 mm ; 8686; 0.14 mm 2
1) Electrical feed-in through intrinsically safe electric circuit of type of protection Ex ia IIC 2) Feed-in valves
Each circuit (end position) has the following safety related max data: Max. input power Pi = 1.1 mW
Max. input voltage Ui = 12V DC / max. input circuit Ii = 50 mA Max input voltage and max. input circuit acc. following table:
Max. input power Pi = 60 mW Ui [V] 15 18 20 22 25 28 30 35
Internal capacity and inductance negligible Ii[mA] 900 440 309 224 158 120 101 73
Internal capacity and inductance negligible
With Fieldbus communication; AS- Interface Type 8685
Profile S-O.A.E (A/B slave, max 62 slaves/master)
Power supply 29.5 to 31.6 VDC
via bus lines Acc. to specification
separated from bus signal On request
Max. power consumption 35 mA
(2 terminal position reached)
Electrical connection M12 4-pin with 1 m cable on flat cable clip
Programming data See operating manual

With Fieldbus communication; AS- Interface Type 8686
Profile S-O.A.E (A/B slave, max 62 slaves/master)
Power supply 29.5 to 31.6 VDC
via bus lines Acc. to specification
separated from bus signal On request
Max. power consumption
Max. power consumption (2 valves activated and 2 feedback active) ≤ 120 mA
Outputs
Contact rating ≤ 2x0.8 W (above AS- Interface)
Watch-dog function Integrated
Inputs
Sensor operating voltage 24 V ±10% (above AS- Interface)
Acceptable current load ≤ 50 mA short circuit protected
Switching level High 10 V
Input current High ≤ 1.5 mA
Input current Low ≤ 0.1 mA
Electrical connection M12 4-pin with 1 m cable on flat cable clip
Programming data See operating instruction

Options
• Type 8686 ASI version with external power supply
• Type 8686 24 V DC version with cable gland

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