IDEC SMARTRELAY User Manual page 44

IDEC SmartRelay installation and wiring
2.3 Wiring IDEC SmartRelay
Connecting a potentiometer to inputs I1, I2, I7 and I8
To allow you to achieve 10 V as the maximum value when you completely turn the
potentiometer once, you must connect a series resistor on the potentiometer's input side
regardless of the input voltage (see figure below).
We suggest the following sizes of potentiometers and associated series resistors:
Voltage
12 V
24 V
When using a potentiometer and 10 V input voltage as the maximum value, you must ensure
that with a connected input voltage of 24 V, 14 V must release via the series resistor to
ensure a maximum supply of 10 V when you turn the potentiometer one full rotation. With a
voltage of 12 V, you can neglected this.
Note
The FL1F-J2B2 expansion module provides additional analog inputs.
Always use shielded cables for analog signals, and keep these as short as possible.
Sensor connections
Connect sensors to IDEC SmartRelay as shown below.
FL1F-B12RCE/H12RCE and FL1F-B12RCA/H12RCA/H12SCD
32
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Potentiometer
5 kΩ
5 kΩ
The inputs of these devices are not isolated
and therefore require a common reference
potential (chassis ground).
With FL1F-H12RCE/B12RCE and FL1F-
H12SCD modules, you can tap analog
signals between the supply voltage and
chassis ground (* = series resistor (6.6 kΩ)
at 24 VDC).
Series Resistor
-
6.6 kΩ
IDEC SmartRelay Manual