Samson 430 Series, Mounting And Operating Instructions

Page: 38 / 78

38 EB 7030 EN
Connections
7.2 Electrical connections
Electrical connection only applies to the con -
troller stations with additional i/p converter
for controlled variable x, external set point
w
ext
and/or with inductive limit contacts.
For electrical installation, observe the rele -
vant electrotechnical regulations and the ac -
cident prevention regulations that apply in
the country of use. In Germany, these are
the VDE regulations and the accident pre
-
vention regulations of the employers’ liability
insurance.
Incorrect electrical connection will render the
explosion protection unsafe.
Do not loosen enameled screws in or on the
housing.
Adhere to the terminal assignment specified
in the certificate!
Adhere to the terminal assignment specified
in the certificate. Switching the assignment of
the electrical terminals may cause the explo
-
sion protection to become ineffective.
WARNING !
Fig. 21: Electrical connection, Type 3430 Indicating Controller with Type 3438 Transmitter Module
+ –
–
+
+
–
+
–
X
4...20 mA
L
N
PE
4 3
+ – 3 4
11 12 13
Pt 100
ϑ
14
–
+
–
+
T
I
I
P
PID
W
Y
H
Y
A
Y
38
W
ext
27
Z
8/9
Supply Output External
Setpoint
~
EEx i
24V–
EEx i
Sensor connection: no line calibration is required for four-
wire connection.
The resistance of the wires must be identical and the per -
missible line resistance of 50 Ω per wire must not be ex -
ceeded.
Route the sensor lines from the relay or contactor lines sep -
arately.
Safe area Ex Zone 1
Type 3438