10 Industrial Ethernet Communication Adapter Modules (ECAM)
80
PXR Electronic trip unit
01/21 MN012005EN
www.eaton.com
The fieldbus wiring is done as follows:
Figure 17: Ethernet communication adapter modules wiring
a
Modbus RTU input
b
Bus termination resistor (for the final node)
c
Modbus RTU-compatible cable:triple wire: two twisted signal wires; one shielded COM wire
d
HF-compatible functional grounding
e
Modbus cable
f
RS-485 Sub DB9 male connector
g
Front view
h
Bottom view
i
RJ45 input
j
RJ45 output
The Sub DB9 male connector wiring must be done as follows:
Figure 18: Sub DB9 Male connector wiring
①
④
②
③
⑥
⑤
PXR-RCAM_MRTU-I
120R
⑦
⑧
⑨
⑩
PWR
X2.1
ETHERNET/IP
X2.2
GW
MRTU
NZM
MS
NS
LA1
LA2
Sub DB9 male connector
Pin
Signal
Description
1
Not available
Not used
2
Not available
Not used
3
Not available
Not used
4
Not available
Not used
5
GND
Ground
6
Not available
Output for external bus termination
7
Not available
Not used
8
B
NZM Line B
9
A
NZM Line A
Connector
Shield
Functional earth (braided shield)
5
GND
4
N/A
3
N/A
2
N/A
1
N/A
9
A
8
B
7
N/A
6
N/A
