FX16 Master Controller Technical Bulletin 53
Digital Inputs
The FX16 Master Controller features eight opto-isolated digital inputs
from potential free contacts. A digital input is active depending on its
Polarity setting (in the related Digital Input object setup configuration
using FX Builder). The default setting is Direct, which means that it is
active (true) when closed.
See I/O Technical Details for the complete FX16 I/O table.
Powering the Digital Inputs
FX16D and FX16X (Not Rev. A) Master Controller
You must power the eight FX16 Master Controller digital inputs with
24 V (through terminals 34 and 35). You can use either AC or DC
voltage to power the digital inputs. If you use DC voltage, make sure
the power supply of the DIs stays independent from the controller
power supply, as the FX16 (not Rev. A) Master Controller is only
compatible with AC power. The digital inputs can use the same power
supply as FX16 Master Controller or you can separately power them to
maintain the isolation from the internal processor (CPU) circuits.
3221
DI1
DI2
DI8
DI V ~ Hot
242322 33 34 35
24V
V ~ Hot
939291
V ~ Com
Earth
FX16
120/230VAC
24 VAC
DI V ~ Com
DICom
DICom
DICom
2
A
Figure 47: Powering the Digital Inputs - FX16D and FX16X (Not Rev. A)
Controller
15 VA
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