2 Safety Barriers

2
Dual-Channel Safety Barriers
Safety Barrier Polarity: + / Signal Barrier Polarity: +
Series 9002/13
Dual-Channel Safety Barriers
Safety Barrier Polarity: + / Signal Barrier Polarity: +
Safe area
+ve
Control room
equipment
0V
+ve
U N
Hazardous area
+ve
Intrinsically safe
field device(s)
+ve
• Diode return barrier for supply and
return signals in one unit with
very small entity current (I o) addition
from the second channel
• Allows the connection of unregulated
power supplies, U N, to channel 1
• Operational current limited to 35 mA
• Approved for installation in Division 2
and Zone 2
/PA
05827E02
Selection Table
Channel U N R min R max I max ãU Safety Data Order number
U o I o P o IIC IIB
1
2
1+2
L o C o L o C o
V O O mA V V mA mW mH mF mH mF
20 - 35
26
- -
292
- -
- -
327
- -
- -
107
- -
- -
- -
3.5
- -
28
28
28
97
0
100
679
21
700
1.8
50
1.55
0.083
0.083
0.08
12
150
11
*)
Only for channel 1: leakage at < 26 V / > 26 V I leak ( 1 mA / 35 mA
0.65
0.65
0.635
9002/13-280-100-041 *)
Functional and Maximum Safety Values
U N Nominal voltage ãU Additional voltage drop
through the safety barrier
R min
R max
I max
Minimum resistance
of the safety barrier
Maximum resistance
of the safety barrier
Maximum current
through the safety barrier
L o
Maximum permissible
external inductance
U o Maximum voltage C o Maximum permissible
external capacity
I o
P o
Maximum current
Maximum power
2/13
Automation 03.08.2010