Samson 3725 - Electric Power Supply; Cable Entry; Connecting the Electrical Power

46 EB 8394 EN
Mounting and start-up
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:
Î 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:
Î Equipment may be switched under nor-
mal operating conditions.
The maximum permissible values specied in
the statement of conformity and its addenda
apply when interconnecting the equipment
with energy-limited circuits in type of protec-
tion ExnLIIC.
5.8.1 Electric power supply
Î Only use a current source and never a
voltage source!
Î Keep the reference variable within the
static destruction limit of ±33V.
5.8.2 Cable entry
The M20x1.5 cable gland is designed for a
clamping range of 6 to 12mm.
The cage clamp terminals hold wire
cross-sections of 0.2 to 1.5mm².
Î To unlock the cage clamp terminals:
place a slotted screwdriver on the plastic
part (Fig.17) and lightly push it into the
terminal block.
Î Insert or remove the wire without force.
5.8.3 Connecting the electrical
power
Risk of malfunction due to incorrect sequence
of mounting, installation, and start-up.
Keep the following sequence.
1. Remove the protective caps from the
pneumatic connections.
2. Mount the positioner on the valve.
3. Connect the supply air.
4. Connect the electrical power.
5. Perform the start-up settings.
Î Connect the electrical power (mA signal)
as shown in Fig.17.
NOTICE
!