Chapter 2 Installation
FastFlo™ 620S Instruction Manual
2-4
IM-62S
Wiring Connections
The NEMA 4X enclosure contains an integral wiring compartment with one dual
strip terminal block for power and signal connections and one dual strip terminal
block for sensor connections. The enclosure has one 1/2 inch female NPT con-
duit entry. The terminal designations are labeled inside the enclosure cover.
Figure 2-2. Wiring Access
Input Power Wiring
Depending on the flow meter configuration, connect 18 to 30 VDC (625
mA load, maximum) as shown below. Confirm power configuration
be-
fore
applying power. See the flow meter nameplate for input power rat-
ing
.
Figure 2-3. Input Power Connections
Smart electronics
and wiring connections
inside cov er
To access components:
1. Loosen 4 screws.
2. Remov e cov er.
1/2 inch
FNPT
conduit
entry
TB2
PWR (+)
PWR (–)
+
–
Power & signal
1
2
15
16
Sensor
1
2
5
6
TB1
Warning!
All wiring procedures
must be performed
with the power Off.
Warning!
To avoid potential electric
shock, follow National
Electric Code safety prac-
tices or your local code
when wiring this unit to a
power source and to pe-
ripheral devices. Failure to
do so could result in injury
or death.
Note!
The FastFlo input power is
a Sierra exclusive at 18 to
30 VDC.
