The MTL9121 and 9122 Intrinsically Safe power supplies install on a DIN
Rail and are powered by a typical bulk 24 VDC power supply. The IS power
supplies connect to the segment wiring to power the fieldbus devices that are
not self-powered. On the top of each supply is a 3 pin connector for connection
to the safe area host fieldbus and a 3 pin connector for connection to the safe
area 24 V power. On the bottom of each supply is a 3 pin connector for
connection to the IS area. The following figure shows the connectors on the
power supplies.
Note
The hazardous area wiring must remain separated from the safe area wiring. This includes the shield drain wires as they must be separate wires all the way to the ground connection.