User's Manual

Doc.: HD0389-00-Manuale_TL_GWCxxxx_r.0.1_EN.doc-00 17/04/2011 Page 14 of 49
2.2.2. I/O electrical specifications
Digital inputs opto-insulated, 200kHz bandwidth, 24Vdc
PNP/Push-Pull (5Vdc upon request).
Digital inputs connection schema
To avoid damages to input circuitry, please do not exceed minimum and
maximum ratings reported in the following table:
Digital input
Logical state 0 Logical state 1
Nominal
voltage
Limits
UL
V
IL
mA
UH
V
IH
mA
Max.
1.5 ND 5 17
5 Vdc ± 5%
Min.
0 ND 2 3
Max.
ND ND 19.2 7
24 Vdc ± 20%
Min.
ND ND 28.8 12
f
MAX
200kHz
Protections
Protected against polarity inversion
The external device connected to the GWC should have a dedicated
power supply.
Digital inputs electrical connection
Depending upon external device output type, please adopt the most
appropriate electrical connection schema between those reported hereafter.
PNP source
i
R1
R3
DZ
R2
VSS
+Input VCC
8
6
VEE
7
5
3
2
n.c.
4
n.c.
1
+Input
VSS
VSS
PNP source
VDD
VSS
VSS
connessione
User Device
R1
R3
DZ
R2
VSS
+Input VCC
8
6
VEE
7
5
3
2
n.c.
4
n.c.
1
Opto
+Input
VSS
VSS