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Field Device Coupler Ex e / Ex i
Series 9411/21
Technical Data
Trunk,
non intrinsically safe / Ex e
Connections
Voltage range
Low voltage monitoring
Max. DC current
2 trunk connections (in, out), internally interconnected
16 V ... 32 V
U < 16 V, spurs deenergized
at 16 V at 24 V at 32 V
0 mA each spur 28 mA 24 mA 22 mA
20 mA each spur 120 mA 80 mA 65 mA
40 mA each spur 220 mA 140 mA 105 mA
3 sprus á 40 mA, 235 mA 150 mA 105 mA
1 spur in short-circuit
short-circuit all spurs < 80 mA < 60 mA < 50 mA
Max. power dissipation
Indication
Reverse polarity protection
Max. number of
Field Device Couplers
1.4 W
LED green „PWR“
(U ) 16 V on trunk)
yes
4 per trunk
Termination The Field Device Couplers have a built-in termination resistor 100 Ohm + 1 uF (IEC 61158-2).
A jumper between terminals TERM 1 and 2 connects termination to the trunk.
Spurs,
intrinsically safe FISCO Ex i
Number 4
Number of field devices
Max. cable length
Output voltage
Current range
Min. no-load voltage
Max. internal resistance
Max. short-circuit current
Indication each spur
Earthing of cable screens
(trunk and spurs)
Direct earthing
Capacitive earthing
Power management
1 per spur
120 m
) 10 V bei 40 mA per spur
0 mA ... 40 mA per spur
12 V
65 Ohms
50 mA
LED yellow „S1“ ... „S4“
on grounding bar
over 4.7 nF at terminal „S“;
(grounding bolt M 6)
remark:
for types 9411/21-212-31 and 9411/21-222-31 (metal enclosure) the bolt is internally connected to
the enclosure
When the trunk voltage exceeds 16 V the spurs are energized one after the other to avoid high
starting current resulting from field devices. A short circuit detected on a spur will deenergize the
respective spur until the short-circuit is removed. Regardless how many spurs are short-circuited
the trunk is loaded with max one spur short-circuit current. Thus the trunk current and the device
power dissipation are minimized under all conditions.
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General Catalogue 23.02.2006