Module Specifications; Terminal Blocks - Moxa Technologies ioThinx 4500 45ML-5401 User Manual

ioThinx 4500 (45ML) Module Series

Module Specifications

Terminal Blocks

Wire range: 18 to 24 AWG
Wire strip length: 9 to 10 mm
Unit: mm (in.)
45ML-5401
Pin Assignment
The following tables shows the 45ML-5401 pin assignments.
Pin RS-232
1 GND
2 TxD1
3 RxD1
4 RTS1
5 CTS1
6 TxD2
7 RxD2
8 RTS2
9 CTS2
10 GND
Setting Up Termination Resistors
When setting up your RS-485 and RS-422 networks for long-distance communication, you should use
termination resistors to prevent signal reflections. The following figures illustrate how to properly configure
termination for a 2-wire RS-485 network, and an RS-422 network.
The 45ML-5401 Series comes with 10 kilo-ohm pull-high/low resistors built in. You will usually only need to
install termination resistors (typically 120 Ω) on the first and last devices on your network.
RS-422 RS-485
GND GND
TxD1+ Data1+
TxD1- Data1-
RxD1+ –
RxD1- –
TxD2+ Data2+
TxD2- Data2-
RxD2+ –
RxD2- –
GND GND
3-2
Hardware Installation
Pin RS-232 RS-422
11 GND GND
12 TxD3 TxD3+
13 RxD3 TxD3-
14 RTS3 RxD3+
15 CTS3 RxD3-
16 TxD4 TxD4+
17 RxD4 TxD4-
18 RTS4 RxD4+
19 CTS4 RxD4-
20 GND GND
RS-485
GND
Data3+
Data3-
–
–
Data4+
Data4-
–
–
GND