NIOT-E-NPIX-RS485: Extension module for RS-485
21/35
Block diagram
R
COM0
G
R
R
+3V3
BCM22(GPIO)
R
COM1
G
R
R
+3V3
BCM25(GPIO)
BCM17(BCM_TX_EN)
D
R
SN65ALS176
A
VP
Pin
Signal
Connector
R=1MOhm
C=2.2nF/1000V
PE
NXE1S0305MC
L
L
+3V3
GND
IN
OUT
ISO+5V
ISOGND
ISO-Area
GND-Area
C
C
DCDC-Converter
ISOGND
3,3V DC
5V DC
SI8642BC-B-IS1
VDD2
GND2
A1
A2
6
X400
VDD1
GND1
I
S
O
L
A
T
I
O
N
B1
B2
A3
A4
B3
B4
R
R
R
BCM23(GPIO)
BCM26(GPIO)
LED0_GREEN
LED0_RED
LED1_GREEN
LED1_RED
C
ISO+5V
ISOGND
BCM14(BCM_TXD0)
BCM15(BCM_RXD0)
EN
TX
RX
C
+3V3
GND
EN1
+3V3
EN2
ISO+5V
R
R
DE
R=1,5K
B
RE
RXD/TXD-P
3
RXD/TXD-N
8
5
ISOGND
ISOGND
Little Fuse
CNTR_P
R=100K
ISO+5V
R=100K
ISOGND
Block diagram: NPIX-RS485
6
ystem
connector
A
B
C
D
E
F
G
L=600Ohm@100MHz
L=600Ohm@100MHz
C=10µF/10V
C=10µF/10V
n.c.
1
n.c.
2
n.c.
4
n.c.
7
10
PE
11
n.c.
9
Connector
case
Figure 21: NIOT-E-NPIX-RS485 block diagram
netPI Extension Modules | NPIX
DOC171201HW01EN | Revision 1 | English | 2018-01 | Released | Public
© Hilscher 2018