Installation Instructions Manual

5
Bul. 937C Transmitter Supply Converter Installation Instructions
Connection
The removable terminals of the Bulletin 937 Converters simplify the
connection and the switch cabinet assembly. They make it possible to
replace devices quickly and without error if a customer service becomes
necessary.
Terminals are equipped with screws, are self-opening, have a large
connection area for a wire cross-section up to 2.5 mm/14 AWG and
coded plugs, making it impossible to mix them up.
The intrinsically safe field circuit is connected to the blue
terminals 1 and 3. These may be guided into the potentially
explosive areas with connector cables in accordance with
DIN EN 60079-14. Terminal 2 is always left unconnected.
The non-intrinsically safe field circuit is connected to the
black terminals 1
through 3.
You can con n e c t :
•
a 3-wire transmitter
•
a 2-wire transmitter with HART
•
an active current source
Connection terminals (Input) IS Side
1+
2-
3
mA
ERR 24 V DC
Power Rail
Zone 0, 1, 2
Div. 1, 2
mA
HART
1
3.
2