FP4, FP4W
22
and 0.125 mm
2
(AWG26) or wider gauge, the maximum length is 1200 m. The derivations
must be short, never more than 20 m.
To minimize the reflections from the end of the RS-485 cable it is required to place
a line termination near each of the 2 ends of the bus. The device has an internal
termination system, activated by DIP switch on the left side of the terminal block. The
correct operation of the terminator requires setting both switches in the same position.
The ‘common’ wire should be used for all RS-485 ports. For FP4 device as a common
signal the power supply ‘-’ (terminal no. 26) or functional ground (terminal no. 27) have to
be used. For the FP4W device supplied from 230 VAC source (jumpers in the 24OUT
configuration), the '-' terminal (terminal 3 or 4) should be used as a common signal.
5.7 Ethernet port
Ethernet (100Base-T) port is located in the rear panel of the FP4 device or at the
bottom of the FP4W device. Outputs connections are compliant with EIA/TIA-568A/B.
A LAN cable (Patch Cord) ended with RJ-45 plug may be connected to this port.
5.8 Power supply connection (FP4)
Fig. 5.16 Power wiring diagram (FP4).
The device requires 24 VDC power supply. If supplied from 230/110 VAC, it is
recommended to use high efficiency industrial switching power supply at minimum 15 W of
delivered power.
To ensure safety, the device's supply must satisfy the conditions
applicable
to
lower
voltage
sources
SELV
(Safety
Extra
Low-Voltage), supplied with the 24 VDC as per the IEC60950-1.
In order to eliminate interference, it is recommended to connect the ground wire to the
terminal block (terminal no. 27). It is so called functional ground. This connection is not
required due to safety requirements.
Details are described in section
TECHNICAL SPECIFICATION
.
5.9 Power supply connection (FP4W)
The device is delivered in the 24OUT jumpers configuration, which enables supplying
the device from 230 VAC source. In this configuration, additional devices can be supplied
via terminals 1-4 (max. 100 mA).
