Ex Isolator Mtl5051 - Honeywell Elster EK280 Applications Manual

EK280

6.4.2 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.
6.4.2.1 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.
EK280
6.4.2.2 MTL5051 switch positions
1a = OFF
1b = ON
2a = OFF
2b = ON
Application Manual
TxD
DTR
RxD
DCD
Ri
GND
Uext+
Uext-
MTL5051
54
24V =
- +
13 14
RS232
device,
i.e. PC
TxD
GnD
RxD