Installing Electrical Connections
Page 12 of 40
9023744 - 3rd edition - October 2005
4-Wire Connection
1 Remove dummy plug.
2 Screw second cable gland (see Order List, page 31) into housing and secure
with nut.
Important:
The cable gland is a part of the approved device and only the one listed in the Order
List is allowed to be used. It is suitable for cable diameters of 7 to 12 mm.
Non-observance will affect the ex-approval!
● The cable resistance per core for the connection to the transmitter terminals K1
and K3 must not exceed 20 Ohms.
● The sum total of the input resistance of the central controller and the line
resistances of both cores for the connection to the transmitter terminals K3
and K4 must not exceed 350 Ohms.
● Connect screen to terminal E of the transmitter.
● Ground the transmitter via external terminal, but do not ground screen at the
central controller,
or
● do not ground transmitter via external terminal, but ground screen in the central
controller.
● Central controller and supply unit can also be combined in one unit.
00923744_1.eps
1 2
01023744_1_en.eps
K1
K2
K3
K4
E
0 V
4 to 20 mA
Central controller
K1
K2
K3
K4
E
E
Supply unit
24 V ±20 %, 0.3 A
+24 V
0 V
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