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Measuring device, Power supply, Controller, RFID system, Enclosure
Text version of the page
2/15
2
Automation 17.04.2008
Dual-Channel Safety Barriers
Signal Barrier Polarity: + / Signal Barrier Polarity: -
Series 9002/34
Dual-channel safety barriers
Signal barrier polarity: + / signal barrier polarity: -
05828E02
• Diode return barrier for DC
current return signals with very small
entity current (Io) addition
• Application specific for passive 4/20 mA
signals (from 4-wire transmitters) with
isolated analog input at the control system
• One positive polarity channel and one
negative polarity channel
• Approved for installation in Divison 2
and Zone 2
Selection Table
Channel UN Imax. ÄU Safety-specific data Order number
Uo Io IIC IIB
Lo Co Lo Co
V mA V V mA mH mF mH mF
12
1+2
16
5
21
100
100
3.5*)
3.5*)
28
8
28
000
1000
1000
1000
0.22
8.4
0.083
1000
1000
1000
1.14
100
0.65
9002/34-280-000-001
Functional and Maximum Safety Values
UN Rated operating voltage Uo Maximum voltage Co Maximum permissible
external capacity
Imax. Maximum current
through the safety barrier
Io Maximum current
ãU Additional voltage drop
through the safety barrier
Lo Maximum permissible
external inductance
+ve
-ve
+ve
-ve
0V
RL UN
/ PA
Intrinsically safe
field device(s)
Control room
equipment
Safe area Hazardous area
*) 2,5 V to 20 mA