User Manual
DIC324
2.3.4
Input channel diagram
The wiring diagram of input channel (number x) is shown in Figure 2-5. Using a limiting
resistor, input signal is transferred to optron. Jumpers XP13-XP20 enable to change the
connection type (two-wire, single-wire, potential-free contact). Output signal from optron is
received at FPGA matrix input.
+3.3V
+DIx
-DIx
+Vin
-Vin
1
(2)
RN
3
5
7
(4)
(6)
(8)
FPGA
DC-DC
Fig. 2-5: Diagram of DIC324 input channel
For galvanic isolation, the following optrons are used: TCMT-1600 (Vishay). Input channel
implementation, similar to the one of DIC112/DIC122.
Switches (jumpers):
−
Selection of input signal connection mode. Jumpers (XP13-XP20) of changing the
signal connection type make it possible to set the type of input signal: differential,
single-wire, potential-free contact
1
1
a
b
Fig. 2-6: Connection type jumpers
a)
– differential (set at the time of delivery); b) – single-wire.
−
Selection of contact connection 33 connectors XP10: +Vin
or
–Vin, is set
using the jumper at XP12 connector.
20
