Burkert Type 8643 - Manual (Page 16)

16
System Description
Designation Values
Max. power requirement
Bus voltage
Power consumption of bus
200 mA (17 V)
140 mA (24 V)
110 mA (32 V)
9 ... 32 V DC
12 mA /17 mA FDE
power supply voltage
2-wire version
Max. power requirement
Bus voltage
320 mA (17 V)
220 mA (24 V)
160 mA (32 V)
17 ... 32 V DC
inputs 8, intrinsically safe, NAMUR
(in accordance with EN 60947-5-6)
outputs
Outputs for pilot valves
min. switching current
min. holding current
Internal resistance
Off-load voltage
4, intrinsically safe
30 mA
1)
15 mA
330 ohm
24 V
1) Power reduction to holding current after minimum 50 ms.
Designation Values
Electrical connections for inputs and outputs Screw terminals (up to 2.5 mm²)
Field bus interface
4-wire version
Ignition protection type
Electrical connection
2-wire version
Ignition protection type
Communication in accordance with IEC 1158-2
in accordance with FISCO
EEx i
4 screw terminals bus (up to 2.5 mm²)
3 screw terminals shield
(1x directly and 2x capacitively earthed)
EEx e
Auxiliary supply
Ignition protection type
Electrical connection
For 4-wire version only
Increased safety EEX e
4 screw terminals (up to 2.5 mm²)
Device key (see rating plate)
2-wire version (polyester housing)
2-wire version (aluminium housing)
4-wire version (polyester housing)
4-wire version (aluminium housing) 8643-2-PO-XX-X-XXX
8643-2-AL-XX-X-XXX
8643-4-PO-XX-X-XXX
8643-2-AL-XX-X-XXX
The cable resistance to the sensors and actuators may be max. 20 • Ω.
The Power I/O Box Type 8643 may be supplied with low safety voltage in accordance with VDE 0631 only. •
english
Type 8643 PA