Installation Guide User Manual

5
Wiring the Console
Intrinsically Safe Wiring
Non-intrinsically safe wiring cannot be run in the
same conduit as intrinsically safe wiring.
Probe Wiring
The probe wiring is intrinsically safe and kept separate
from all other wiring. Conduit must only enter the console
enclosure through the designated knockouts. Installation
may require the conduit to enter on top or bottom. Do not
loose the conduit plugs and make sure any openings are
covered by the plugs.
Probe Terminals
Figure 3: Probe Wiring
Attach the probe wiring in order as shown on the label
below.
Probe Input Specications
Number of Channels: 6
Safety Rating: Class I, Division 1, Group D, [Ex ia] IIA
Entity Parameters
Uo = 28.35 V
Io = 157.5 mA
Co = 1.04 uF
Lo = 1.4 mH
Po = 1.1 W
Terms dened
Term Denition
Uo Maximum Output Voltage
Io Maximum Output Current
Po Maximum Output Power
Co Maximum External Capacitance
Lo Maximum External Inductance
Cables Required for Liquid Level Probes
Use cables and wires compliant with national and local
codes to insure reliable communication between the
console and probes. To ensure reliable communication
between a console and probes, FFS recommends using
the types of cable shown below up to a recommended
length of:
All cable to be shielded twisted pair, 22AWG or greater
and oil / water resistant.
Distance
feet (m)
Capacitance
(pF)
per foot
Inductance
(µH)
per foot
Belden Cable
500 (152) <100 <0.2
87760
87761*
1000 (305) <60 <0.2
88760
8760
8770
1500 (457) <20 <0.3 89182*
Note: An asterisk (*) indicates cables that may be ordered
from FFS.