CET PMC-1302 User manual

PMC-1302
Ethernet Serial Gateway
User Manual
Version: V1.1
February 28, 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 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 ESG via Web Interface ..................................................................9
4.1 Web Console Login.....................................................................................................................9
4.2 Ethernet....................................................................................................................................10
4.3 Serial Port .................................................................................................................................10
4.4 Change Password .....................................................................................................................11
4.5 Device Information...................................................................................................................11
4.6 Exit ...........................................................................................................................................12
4.7 Reboot......................................................................................................................................12
Chapter 5 Communications through the PMC-1302 ESG .......................................................................13
5.1 Topological Graph.....................................................................................................................13
5.2 Configuring the PMC-1302 ESG................................................................................................13
5.3 Configuring PecStar iEMS .........................................................................................................14
Appendix A - Technical Specifications..................................................................................................... 17
Appendix B - Standards Compliance....................................................................................................... 18
Appendix C - Ordering Guide..................................................................................................................19

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Chapter 1 Introduction
This chapter provides an overview of the PMC-1302 ESG and summarizes many of its key features.
1.1 Overview
The PMC-1302 ESG is an Industrial Ethernet Serial Gateway which provides one 10/100BaseT Ethernet
port and two RS-485 ports. It is the ideal equipment for connecting RS-485 enabled serial devices to
an IP-based Ethernet LAN, making it possible to access serial devices over your Ethernet network for
any SCADA or Automation applications. The PMC-1302 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
8 kV ESD protection
1.5 kV 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 ESG supports the efficient transfer of serial packets between the upstream
network-based applications and the downstream RS-485 serial 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 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 serial devices. Perfectly suited for
communicating with industrial devices that have timing sensitive protocols, the PMC-1302 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.
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 [email protected]

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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 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 downward to the “unlock” position.
Align the top of the mounting channel at the back of the PMC-1302 at an angle against the top of
the DIN rail as shown in Figure 2-4 below.
Rotate the bottom of the PMC-1302 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 on to the DIN
Rail.

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Figure 2-4 DIN-Rail Mounting
2.3 RS-485 Wiring
The PMC-1302 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 ESG:
Figure 2-5 RS485 Communications Connections
2.4 Ethernet Port (10/100BaseT)
The PMC-1302 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 ESG
3.1 Front Panel LED Indicators
There are three LED indicators on the PMC-1302 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
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’s front panel. Pressing and
holding the Reset button for 1 to 5 seconds will cause the PMC-1302 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 ESG to default factory
configuration.
3.3 Typical Application
The following figure shows the typical application for the PMC-1302 ESG.
Figure 3-1 Typical Application

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Chapter 4 Configuring the PMC-1302 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 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 ESG in the Address input box of the Internet Explorer and
then press <Enter>.
4) The PMC-1302’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
The PMC-1302 comes standard with two RS-485 ports: P2 and P3. 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 RS485 devices. Please be reminded that the IP Port number of the Serial
Gateway feature for P2 (default = 20000) and P3 (default = 20001) should be different. Click Save to
confirm your changes. The following table shows the setup parameters for P2 and P3. Most setup
parameters are basic and self-explanatory. Please note that the Packet Timeout (ms) parameter refers
to the timeout setting for the IP connection instead of the serial connection, meaning that the IP
connection will be closed if there are no activities between the application software and the
PMC-1302 ESG for the specified amount of time. This is to prevent a potential lock up of the IP
connection at the PMC-1302 ESG if the application software fails to close the IP connection for some
unknown reasons. It is recommended that the default Packet Timeout of 300 seconds be used.