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EK280
Application Manual
149
7.5.2 Ex isolator MTL5051
The MTL5051 is an approved "associated apparatus" and can therefore be used as an interface isolator, if
the EK280 is installed in Zone 1.
7.5.2.1 Connection
Explosion hazard!
If EK280 operation takes place in a potentially explosive atmosphere, ensure that all
safety instructions in the EK280 Operating Instructions are followed.
24V
=
MTL5051
- +
13 14
EK280
1 2 3 4 5 6
7 8 9 10
11
12
Device
with
RS232,
e.g. PC
TxD
DTR
RxD
DCD
TxD
Ri
GnD
GND
RxD
Uext+
Uext-
7.5.2.2 MTL5051 switch positions
1a = OFF
1b = ON
2a = OFF
2b = ON