FL SWITCH SFNB…
2642_en_H PHOENIX CONTACT 6
6 Installation
Install the FL SWITCH SFNB… on a clean mounting rail. To
avoid contact resistance only use clean, corrosion-free
mounting rails that meet the EN 60715 standard. End
clamps can be mounted on both sides of the module to stop
the modules from slipping on the rail.
6.1 Assembly
1. Place the module onto the rail from above. The upper
holding keyway must be hooked onto the top edge of
the rail.
2. Push the module from the front towards the mounting
surface.
3. Once the module has been snapped on properly, check
that it is fixed securely on the rail.
6.2 Removal
1. Insert a suitable tool (e.g., needle-nose pliers) into the
arresting latch and pull it down.
2. Pull the module slightly away from the mounting
surface.
3. Lift the module from the rail.
6.3 Power Connection
The switch is designed for SELV and PELV operation at
+24 V DC according to IEC 61140/EN 61140. Only SELV
and PELV according to the defined standards may be used
for supply purposes.
Snapping the switch onto a grounded mounting rail
connects it to the ground potential. In an environment
particularly prone to EMI, noise immunity can be increased
by an additional low-impedance connection to functional
earth ground (see Figure 2).
Figure 2 Power connections
Use power conductors between 0.2 - 2.5 mm²
(24 - 12 AWG). Torque connection screws to 0.5 - 0.6 Nm
(5 - 7 lb-in.).
6.4 Ethernet Interface
The FL SWITCH SFNB… has either five or eight Ethernet
ports on the front in RJ45 format to which only twisted-pair
cables with an impedance of 100 Ω can be connected. The
data transmission speed is 10/100 Mbps. In addition, every
port has an auto crossing function: it is not necessary to
make a distinction between 1:1 or crossover Ethernet
cables.
Figure 3 RJ45 pin assignment
CAUTION:
Only qualified personnel may start up and operate
this device. Qualified personnel are persons
authorized to start up, ground and mark devices,
systems, and equipment according to the
standards of safety technology.
NOTE:
The FL SWITCH SFNB… module is designed for
SELV and PELV operation according to
IEC 61140/EN 61140.
NOTE:
Connect the mounting rail to protective earth
ground using a grounding terminal block. The
modules are grounded when they are snapped
onto the rail. Connect protective earth ground
with low impedance.
24 V DC
GND US
X6
+ –
RJ45
n.c.
n.c.
TD-
n.c.
n.c.
TD+
RD-
RD+
8765 4321
