Samson 3730-4 - Page 55

EB 8384-4 EN 55
Connections
smaller than 0.1mm. Protect the conductor
ends against splicing, e.g. by using wire-end
ferrules. When two separate cables or wires
are used for connection, an additional cable
gland can be installed. Seal cable entries left
unused with plugs. Fit equipment used in
ambient temperatures below –20°C with
metal cable entries.
Equipment for use in zone2/zone22
In equipment operated according to type of
protection ExnA II (non-sparking equipment)
according to EN60079-15:2003, circuits
may be connected, interrupted or switched
while energized only during installation,
maintenance or repair.
Equipment connected to energy-limited cir-
cuits with type of protection ExnL (ener-
gy-limited equipment) according to
EN60079-15:2003 may be switched under
normal operating conditions.
The maximum permissible values specied
in the statement of conformity and its ad-
denda apply when interconnecting the
equipment with energy-limited circuits in
type of protection ExnLIIC.
Cable entry
Cable entry with M20x1.5 cable gland.
See section on Actuator stem retracts FE (AIR
TO CLOSE) for clamping range.
There is a second M20x1.5 threaded hole
in the housing that can be used for addition-
al connection, when required.
The screw terminals are designed for wire
cross-sections of 0.2 to 2.5mm². Tighten the
screws by 0.5 to 0.6Nm.
The power supply for the positioner can be
supplied either over the connection to the
eldbus segment or over a DC voltage
source (9 to 32V) connected to the bus ter-
minals in the positioner.
Note
u
Option
+81 -82 IEC 1158-2 +87 -88 +85 -86 +41 -42
AB
24 V DC BE1 BE2
G
Forced venting
function with
solenoid valve
(optional)
Bus line
Binary contacts
(optional)
Switching amplier
EN60947-5-6
Inductive limit
switch (optional)
Leakage
sensor
Fig.20: Electrical connections