19
INM9312-FB-ST-SS-1
Oct 2008
19
Reverse polarity protection
yes
Max. number of Fieldbus
Barriers per trunk
4
Termination
Built-in terminator (100
Ω
+ 1
μ
F according to IEC 61158-2).
A jumper between terminals indicated by
connects terminator to the
trunk.
Spurs, intrinsically safe
FISCO Ex i
Number
8
Number of field devices
1 per spur
Max. cable length
120m
Output voltage
≥
10V @ 40mA per spur
Current range
0 mA – 40mA per spur
Total available current
(to all spurs)
160mA max.
Min. no-load voltage
12V
Max. internal resistance
65
Ω
Max. short-circuit current
50mA
Indication each spur
LED yellow “S1“ – “S8“
Earthing of cable screens
(trunk and spurs)
Direct earthing
cable shields connected directly to earthing bar; no connection to ‘S’ terminal
Capacitive earthing
via 4.7nF, connected to ‘S’ terminals
Error detection
Spur short-circuit
≥
42mA
Error indication each spur
LED yellow “S1“ – “S8“, flashing
Error indication all spurs
LED red “ERR“, flashing
Error indication Fieldbus
Barrier LED
red
“ERR“
Indication of spur causing
overload
LED yellow “S1“ – “S8“, flashing quickly
Electromagnetic
Tested under the following standards and regulations:
compatibility
EN 61326 (IEC/EN 61000-4-1 to 6 and 11; EN 55022 class B);
NAMUR NE 21 (IEC/EN 61000-4-1 to 6, 8 and 11; EN 55022 class B)
Ambient conditions
Operating temperature
–40°C to +70°C
Storage temperature
–40°C to +75°C
Relative humidity
< 95%
(no condensation)
Mechanical data
Terminals
3 pole
screw terminals
(+, -, screen)
(-ST versions)
trunk Ex e
spurs Ex i
rigid
0.2 – 4mm
2
flexible
0.25 – 2.5mm
2
Installation
on DIN rail to EN 50022, or mounting plate
Mounting position
horizontal or vertical
Protection
Intrinsically safe terminals
IP 20
Ex e terminals
IP 30 (enclosure may be opened in hazardous area under power)
Fire protection class (UL-94) HB
T
