CET PMC-1302-3 User manual

PMC-1302-3
Ethernet Serial/LoRa Gateway
User Manual
Version: V1.2
July 3, 2020,

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This manual may not be reproduced in whole or in part by any means without the express
written permission from CET Electric Technology (CET).
The information contained in this Manual is believed to be accurate at the time of
publication; however, CET assumes no responsibility for any errors which may appear here
and reserves the right to make changes without notice. Please consult CET or your local
representative for latest product specifications.

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Limited warranty
CET Electric Technology (CET) offers the customer a minimum of 12-month
functional warranty on the device for faulty parts or workmanship from the date
of dispatch from the distributor. This warranty is on a return to factory for
repair basis.
CET does not accept liability for any damage caused by device malfunctions.
CET accepts no responsibility for the suitability of the device to the application
for which it was purchased.
Failure to install, set up or operate the device according to the instructions herein
will void the warranty.
Only CET’s duly authorized representative may open your device. The unit
should only be opened in a fully anti-static environment. Failure to do so may
damage the electronic components and will void the warranty.

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Table of Contents
Chapter 1 Introduction .............................................................................................................................5
1.1 Overview.....................................................................................................................................5
1.2 Features ......................................................................................................................................5
1.3 Applications ................................................................................................................................5
1.4 Getting more information ..........................................................................................................5
Chapter 2 Installation................................................................................................................................6
2.1 Appearance.................................................................................................................................6
2.2 Mounting ....................................................................................................................................6
2.3 RS-485 Wiring .............................................................................................................................7
2.4 Ethernet Port (10/100BaseT) ......................................................................................................7
2.5 Power Supply Wiring ..................................................................................................................7
Chapter 3 Operating the PMC-1302-3 ESG ...............................................................................................8
3.1 Front Panel LED Indicators..........................................................................................................8
3.2 Reset Button ...............................................................................................................................8
3.3 Typical Application......................................................................................................................8
Chapter 4 Configuring the PMC-1302-3 ESG via Web Interface ...............................................................9
4.1 Web Console Login .....................................................................................................................9
4.2 Ethernet....................................................................................................................................10
4.3 Serial Port & LoRa .....................................................................................................................10
4.4 Change Password......................................................................................................................13
4.5 Device Information ...................................................................................................................13
4.6 Exit……………………………………………………………………………………………………………………………………….13
4.7 Reboot ......................................................................................................................................14
Chapter 5 Communications through the PMC-1302-3 ESG ....................................................................15
5.1 Topological Graph .....................................................................................................................15
5.2 Configuring the PMC-1302-3 ESG.............................................................................................15
5.3 Configuring PecStar iEMS .........................................................................................................16
Appendix A - Technical Specifications.....................................................................................................18
Appendix B - Standards Compliance.......................................................................................................19
Appendix C - Ordering Guide ..................................................................................................................20

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Chapter 1 Introduction
This chapter provides an overview of the PMC-1302-3 ESG and summarizes many of its key features.
1.1 Overview
The PMC-1302-3 ESG is an Industrial Ethernet Serial/LoRa Gateway which provides one 10/100BaseT
Ethernet port, two RS-485 ports and an optional wireless LoRa port with configurable ISM Bands. It is
the ideal equipment for connecting RS-485 and optionally LoRa enabled devices to an IP-based
Ethernet LAN, making it possible to access serial and optionally LoRa enabled devices over your
Ethernet network for any SCADA or Automation applications. The PMC-1302-3 ESG has been
specifically designed with industrial automation in mind and therefore provides un-surpassed
performance and reliability under the harshest industrial or commercial environments.
1.2 Features
1x10/100BaseT
2xRS-485 port
Optional LoRa port with configurable ISM Bands for EU863-870, RU864-870, IN865-867,
US902-928, AU915-928, AS920-923 and AS923-925
8kV ESD protection
1.5kV isolation protection for Ethernet port
3kV isolation protection for RS-485
One-key Reset to default factory
Simple configuration via its built-in web interface
DIN Rail Mount
Extended operating temperature
1.3 Applications
The PMC-1302-3 ESG supports the efficient transfer of serial packets between the upstream
network-based applications, the downstream RS-485 serial and optionally LoRa wireless devices via a
TCP/IP connection. Instead of using a Windows based "Virtual COM" driver with a port-mapping
utility, which is often plagued with driver incompatibility among the many different Windows
versions, the PMC-1302-3 ESG allows applications to directly connect to it via a TCP/IP connection for
the transparent transfer of serial packets inside TCP/IP frames to and from downstream devices.
Perfectly suited for communicating with industrial devices that have timing sensitive protocols, the
PMC-1302-3 ESG provides a reliable interface which allows SCADA or similar applications that already
support direct connection with Ethernet Gateway to communicate with serial devices independent of
the serial protocols used.
The PMC-1302-3 ESG optionally supports the LoRa port with configurable ISM Bands for wireless IoT
applications in most countries.
1.4 Getting more information
Additional information is available from CET via the following sources:
Visit www.cet-global.com
Contact your local representative
Contact CET directly via email at [e-mail]

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Chapter 2 Installation
2.1 Appearance
Figure 2-1 Appearance
Figure 2-2 Upper Connector Arrangement
Figure 2-3 Lower Connectors Arrangement
2.2 Mounting
The PMC-1302-3 ESG should be installed in a dry environment with no dust and kept away from heat,
radiation and electrical noise sources.
Installation steps:
Before installation, make sure that the DIN rail is already in place.
Move the installation clip at the back of the PMC-1302-3 downward to the “unlock” position.
Align the top of the mounting channel at the back of the PMC-1302-3 at an angle against the
top of the DIN rail as shown in Figure 2-4 below.
Rotate the bottom of the PMC-1302-3 towards the back while applying a slight pressure to
make sure that the device is completely and securely fixed on to the DIN rail.
Push the installation clip upward to the “lock” position to secure the PMC-1302-3 on to the DIN
Rail.

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Figure 2-4 DIN-Rail Mounting
2.3 RS-485 Wiring
The PMC-1302-3 ESG provides two RS-485 ports (P2 and P3). Up to 32 devices can be connected on a
RS-485 bus. The overall length of the RS-485 cable connecting all devices should not exceed 1200m.
If the master station does not have a RS-485 communications port, a RS-232/RS-485, USB/RS-485 or
Ethernet/RS-485 converter with optically isolated outputs and surge protection should be used.
The following figure illustrates the RS-485 communications connections on the PMC-1302-3 ESG:
Figure 2-5 S485 Communications Connections
2.4 Ethernet Port (10/100BaseT)
The PMC-1302-3 ESG comes standard with an Ethernet Port (P1) using the MDI/MIDX Auto-detect
RJ45 connector which means users can connect with a straight-through cable or an Ethernet
cross-over cable. The table below lists the meaning for each pin.
RJ45 Connector
Pin
Meaning
1
Transmit Data+
2
Transmit Data-
3
Receive Data+
4,5,7,8
NC
6
Receive Data-
Table 2-1 RJ45 Connector Pin Description for 10/100BaseT Applications
2.5 Power Supply Wiring
For AC supply, connect the live wire to the L/+ terminal and the neutral wire to the N/- terminal.
Figure 2-6 Power Supply Connections

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Chapter 3 Operating the PMC-1302-3 ESG
3.1 Front Panel LED Indicators
There are three or four LED indicators on the PMC-1302-3 ESG’s Front Panel as described in the
following table.
LED Indicator
Color
Status
Function
Run
Green
On
System is running abnormally
Off
Power off or system is running abnormally
Blinking
Power is on and system is running normally
Data
(LoRa option only)
Yellow
On
LoRa is running abnormally
Blinking
LoRa is receiving or transmitting data
P2
Green
Blinking
P2 is receiving data
Yellow
Blinking
P2 is transmitting data
P3
Green
Blinking
P3 is receiving data
Yellow
Blinking
P3 is transmitting data
Table 3-1 LED Indicators
3.2 Reset Button
There is a Reset button at the lower right-hand corner of the PMC-1302-3’s front panel. Pressing and
holding the Reset button for 1 to 5 seconds will cause the PMC-1302-3 ESG to initiate a reboot
sequence. The reboot process would be completed in approximately 30 seconds. Pressing and
holding the Reset button for more than 5 seconds will reset the PMC-1302-3 ESG to default factory
configuration.
3.3 Typical Application
The following figure shows the typical application for the PMC-1302-3 ESG.
Figure 3-1 Typical Application

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Chapter 4 Configuring the PMC-1302-3 ESG via Web Interface
4.1 Web Console Login
1) Open your Internet Explorer with the scripting function enabled. To enable scripting for your
browser, right click on your Internet Explorer icon and then select Properties from the pop-up
dialog box. The Internet Options window appears. Select the Security tab and then click on the
Custom Level button near the bottom of the window. The Security Settings window appears.
Enable the three options as shown below and then click OK.
Figure 4-1 Internet Setting
2) The default IP Address of the PMC-1302-3 ESG’s Ethernet Port is 192.168.0.127. Configure the IP
Address and the Subnet Mask of the PC as 192.168.0.100 and 255.255.255.0 as shown below.
Figure 4-2 Setting IP Address
3) Enter the IP Address of the PMC-1302-3 ESG in the Address input box of the Internet Explorer
and then press <Enter>.
4) The PMC-1302-3’s Web Console Login page appears. Enter the User Name and Password and
then click Login. The default user name is “user”, and the default password is “123456”.

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Figure 4-3 Login Interface
5) Once the log-in credentials are confirmed, the following page appears.
Figure 4-4 Basic Settings
4.2 Ethernet
The P1 (Ethernet) port’s settings can be configured here based on the actual situation. Click Save to
confirm your changes. Please be reminded that the IP Address and Default Gateway for the Ethernet
port should be in the same subnet.
Figure 4-5 P1 Settings
4.3 Serial Port & LoRa
The PMC-1302-3 comes standard with two RS-485 ports (P2 and P3) and an optional LoRa wireless
port (P4). All setup parameters such as Baudrate, Data Bits, Parity, Stop Bits, IP Port and Timeout
can be configured here to match the settings of the downstream RS-485 devices. Please be reminded
that the IP Port number of the Serial Gateway feature for P2 (default = 20001) and P3 (default =
20002) should be different. Click Save to confirm your changes. The following table shows the setup
parameters for P2, P3 and P4. Most setup parameters are basic and self-explanatory.
Please note that the Packet Timeout (s) parameter refers to the timeout setting for the IP connection
instead of the serial or LoRa connection, meaning that the IP connection will be closed if there are no