Advantech SmartFlex SR304 User manual

Hardware Manual
Industrial Cellular Router
SmartFlex SR304
Advantech Czech s.r.o., Sokolska 71, 562 04 Usti nad Orlici, Czech Republic
Document No. MAN-0037-EN, revision from 19th December, 2023.

© 2023 Advantech Czech s.r.o. No part of this publication may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photography, recording, or any information storage and retrieval system without written consent.
Information in this manual is subject to change without notice, and it does not represent a commitment on the part of Advantech.
Advantech Czech s.r.o. shall not be liable for incidental or consequential damages resulting from the furnishing, performance,
or use of this manual.
All brand names used in this manual are the registered trademarks of their respective owners. The use of trademarks or other
designations in this publication is for reference purposes only and does not constitute an endorsement by the trademark holder.

Used symbols
Danger – Information regarding user safety or potential damage to the router.
Attention – Problems that can arise in specific situations.
Information – Useful tips or information of special interest.

Contents
1. Router Description 1
1.1 Usage of the Router ......................................... 2
2. Contents of Package 5
3. Router Design 6
3.1 Router versions ............................................ 6
3.2 Product Revisions .......................................... 8
3.3 Delivery identification ........................................ 9
3.4 Order codes .............................................. 10
3.5 Basic dimensions of the router box ................................. 12
3.6 Mounting Recommendations .................................... 12
3.7 Removal from the DIN rail ...................................... 13
3.8 Description of the rear panel ..................................... 14
3.9 Description of the front panel .................................... 14
3.9.1 Status indication ....................................... 15
3.9.2 Power connector PWR .................................... 16
3.9.3 Antenna connector ANT, DIV, GPS and WiFi ....................... 17
3.9.4 SIM card reader ....................................... 18
3.9.5 MicroSD card reader ..................................... 19
3.9.6 Ethernet Ports (ETH0 and ETH1) .............................. 20
3.9.7 Power over Ethernet (PoE) ................................. 21
3.9.8 USB Port ........................................... 23
3.9.9 I/O Port ............................................ 24
3.9.10 Reset ............................................. 26
3.10 Interfaces Description ........................................ 27
3.10.1 SWITCH Interface ...................................... 27
3.10.2 RS232-RS485/422 Interface ................................ 28
3.10.3 RS485/422-RS485/422 Interface .............................. 30
3.10.4 RS232-RS485-ETH Interface ................................ 32
4. First Use 35
4.1 Connecting the router before first use ............................... 35
4.2 Start .................................................. 36
4.3 Configuration ............................................. 36
4.3.1 Configuration by web browser ................................ 36
5. Technical Parameters 38
5.1 Basic parameters ........................................... 38
5.2 Standards and Regulations ..................................... 39
5.3 Type tests and environmental conditions .............................. 40
5.4 Technical parameters of Cellular Module .............................. 41
5.5 Parameters of GNSS ......................................... 42
5.6 Technical parameters of WiFi .................................... 42
5.7 Technical parameters of I/O port .................................. 43

5.8 Technical Parameters of Power over Ethernet (PoE) ....................... 43
5.9 Other Technical Parameters ..................................... 44
Appendix A: Troubleshooting 45
Appendix B: Customer Support 48
Appendix C: Regulatory & Safety Information 49
Appendix D: Related Documents 50

List of Figures
1 Access to the Internet from LAN .................................. 2
2 Backed up access to the Internet .................................. 3
3 Using VPN tunnel .......................................... 3
4 Serial Gateway ............................................ 4
5 Contents of package ......................................... 5
6 Basic version (plastic) ........................................ 6
7 Basic version with WiFi (plastic) ................................... 6
8 Basic version (metal) ......................................... 6
9 Basic version with WiFi (metal) ................................... 6
10 Version SWITCH (plastic) ...................................... 7
11 Version SWITCH and WiFi (plastic) ................................. 7
12 Version RS232-RS485 (plastic) ................................... 7
13 Ver. RS232-RS485 & WiFi (plastic) ................................. 7
14 Version RS232-RS485-ETH (plastic) ................................ 7
15 Version SWITCH (metal) ....................................... 7
16 Version SWITCH and WiFi (metal) ................................. 7
17 Version RS232-RS485 (metal) ................................... 7
18 Version RS232-RS485 & WiFi (metal) ............................... 7
19 Version RS232-RS485-ETH (metal) ................................ 7
20 RS232-RS485-ETH & WiFi (plastic) ................................ 8
21 RS232-RS485-ETH & WiFi (metal) ................................. 8
22 RS485-RS485 (metal) ........................................ 8
23 Label examples ............................................ 9
24 Basic dimensions of the router box ................................. 12
25 Default position of plastic and metal DIN rail clip ......................... 13
26 Removal from the DIN rail ...................................... 13
27 SmartFlex front panel ........................................ 14
28 Power connector ........................................... 16
29 Connection of power supply ..................................... 16
30 Connecting the antenna ....................................... 17
31 SIM cards ............................................... 18
32 MicroSD card ............................................. 19
33 Ethernet connector .......................................... 20
34 Connection of Ethernet cable .................................... 20
35 PoE PD usage ............................................ 21
36 PoE PSE usage ........................................... 22
37 USB connector ............................................ 23
38 I/O connector ............................................. 24
39 Binary connection .......................................... 25
40 Router reset .............................................. 26
41 Version with SWITCH board ..................................... 27
42 Version with RS232-RS485/422 interface ............................. 28
43 RS232 connector ........................................... 28
44 RS485/422 connector ........................................ 29
45 Version with RS485-RS485 interface ................................ 30
46 RS485/422 connector ........................................ 30
47 Version with RS232-RS485-ETH interface ............................. 32

48 Ethernet connector .......................................... 32
49 RS485 connector ........................................... 33
50 RS232 connector ........................................... 33
51 Router connection .......................................... 35
52 Entering the IP address of the router ................................ 36
53 Entering login information ...................................... 36
54 Router web interface ......................................... 37

List of Tables
1 Router versions ............................................ 6
2 HW Revisions History ........................................ 8
3 Delivery identification ........................................ 9
4 Order codes overview ........................................ 10
5 Power over Ethernet ......................................... 10
6 Type of router box .......................................... 11
7 Type of power supply ......................................... 11
8 Examples of order code ....................................... 11
9 Front panel description ........................................ 14
10 LED status indication ......................................... 15
11 Connection of power connector ................................... 16
12 Technical specifications of microSD card .............................. 19
13 Ethernet connector pinout ...................................... 20
14 Insulation strength of Ethernet ports ................................ 20
15 Connection of USB connector .................................... 23
16 Connection of I/O port ........................................ 24
17 Characteristics of inputs ....................................... 24
18 Description of router reset and restart ............................... 26
19 State indication of the SWITCH interface .............................. 27
20 SWITCH interface parameters .................................... 27
21 Connection of RS232 connector .................................. 28
22 Connection of RS485 connector .................................. 29
23 Connection of RS422 connector .................................. 29
24 Technical specification of RS232 and RS485 ........................... 29
25 Connection of RS485 connector .................................. 30
26 Connection of RS422 connector .................................. 31
27 Technical specification RS485 .................................... 31
28 Connections of the Ethernet Connector .............................. 32
29 Connections of Terminal Block Connector RS485 ......................... 33
30 Connections of Terminal Block Connector RS232 ......................... 33
31 State indication of the RS232-RS485-ETH interface ....................... 34
32 Technical specification of RS232, RS485 and Ethernet ...................... 34
33 Basic parameters ........................................... 38
34 Standards and Regulations ..................................... 39
35 Type tests and environmental conditions .............................. 40
36 Technical parameters of cellular module .............................. 41
37 Technical parameters of GNSS ................................... 42
38 Technical parameters of WiFi .................................... 42
39 Characteristics of inputs ....................................... 43
40 PoE PD: parameters for opposite PSE ............................... 43
41 PoE PSE parameters ........................................ 43
42 Other technical parameters ..................................... 44

1. Router Description
SmartFlex SR304 is an industrial cellular router intended for the market in Europe, Middle East and Africa
(EMEA) areas. This device may also be operated in south-eastern Asia. This router is an ideal device
for wireless communication in mobile networks that make use of LTE, HSPA+, UMTS, EDGE or GPRS
technology. Due to the high speed of data transfer up to 150 Mbps (download) and up to 50 Mbps (upload)
is this router an ideal solution for specialized M2M devices and IoT as well as for wireless connection of
traffic and security camera systems, individual computers, LAN networks, automatic teller machines (ATM)
and other self-service terminals.
The standard configuration includes two Ethernet 10/100 ports, one USB 2.0 Host port, two binary inputs
and one output (I/O connector). The device also has two readers for 3 V and 1.8 V SIM cards, which are
located on the rear panel of the router. The router also includes a microSD card port that supports up to
64 GB card storage (32 GB in the case of SDHC cards). The router can be equipped with a WiFi module,
but this must be part of the initial configuration – it cannot be assembled to the router at some point in the
future.
The router can be equipped with PoE PD (Power over Ethernet – Powered Device), which allows the
router to be powered via Ethernet. It can also be equipped with PoE PSE (Power over Ethernet – Power
Source Equipment), which lets the router to power other devices via Ethernet. The SmartFlex router can
also be configured with a wide variety of port options. These can be SWITCH – three switched Ethernet
ports; RS232-RS485/422 – combination of serial interfaces; RS232-RS485-ETH – combination of serial
interfaces and Ethernet port with higher insulation. The router can be provided in either a plastic or metal
casing, depending upon the customer’s requirements.
Configuration of the router may be done via a password-protected Web interface. Web interface provides
detailed statistics about the router’s activities, signal strength, detailed system log etc. The router supports
the creation of VPN tunnels using IPSec, OpenVPN and L2TP to ensure safe communication. DHCP, NAT,
NAT-T, DynDNS, NTP, VRRP, control by SMS, backup primary connection and many other functions are
supported.
The router provides diagnostic functions which include automatically monitoring the PPP connection, au-
tomatic restart in case of connection losses, and a hardware watchdog that monitors the router status. The
user may insert Linux scripts which are started on various actions. It is possible to create up to four differ-
ent configurations for the same router. These configurations can be switched whenever necessary via Web
interface, SMS or binary input status. The router can automatically upgrade its configuration and firmware
from your central server. This allows for mass reconfiguration of numerous routers at the same time.
The router also supports additional software like R-SeeNet for permanent traffic monitoring of routers.
SmartFlex SR304 Hardware Manual 1

1. Router Description 1.1 Usage of the Router
Examples of possible applications
• mobile office
• fleet management
• security system
• telematic
• telemetric
• remote monitoring
• vending and dispatcher machines
1.1 Usage of the Router
The router is primarily intended for these four basic situations:
I. Access to the Internet from LAN
Figure 1: Access to the Internet from LAN
SmartFlex SR304 Hardware Manual 2

1. Router Description 1.1 Usage of the Router
II. Backed up access to the Internet (from LAN)
Figure 2: Backed up access to the Internet
III. Secure networks interconnection or using VPN
Figure 3: Using VPN tunnel
SmartFlex SR304 Hardware Manual 3

1. Router Description 1.1 Usage of the Router
IV. Serial Gateway
Figure 4: Serial Gateway
SmartFlex SR304 Hardware Manual 4

2. Contents of Package
Basic delivered set of router includes:
• router,
• power supply,
• crossover UTP cable,
• up to three external antennas,
• loose power and I/O connector (+8 pins1),
• 4-pins and 5-pins terminal block for RS485 and RS232
(only for version with interface RS232-RS485/422),
• 3-pins and 4-pins terminal block for RS485 and RS232
(only for version with interface RS232-RS485-ETH),
• clip for the DIN rail,
• printed Quick Start Guide Leaflet.
Figure 5: Contents of package
Temperature range for power supply is reduced to 0 ◦C to +40 ◦C!
1These pins are designed for cables with a diameter from 0.2 to 0.8 mm2
SmartFlex SR304 Hardware Manual 5

3. Router Design
3.1 Router versions
Check with your local Advantech sales representative for available options and HW configurations.
SmartFlex SR304 router is supplied in the following versions (see table below). All versions are available
in plastic or metal box according to customer requirements. All versions are available with PoE PD (Power
over Ethernet – powered device) so you can power the router from both ETH0 and ETH1 interfaces, or with
PoE PSE (power source equipment) so you can power other devices by the router.
Router versions
SIM
BIN
BOUT
USB
SD
ETH
WiFi
232 485
Basic version 2 x 2 x 1 x 1 x 1 x 2 x
Basic version with WiFi 2 x 2 x 1 x 1 x 1 x 2 x 1 x
Version with SWITCH board 2 x 2 x 1 x 1 x 1 x 5 x
Version with SWITCH board & WiFi 2 x 2 x 1 x 1 x 1 x 5 x 1 x
Version with RS232-RS485/422 board 2 x 2 x 1 x 1 x 1 x 2 x 1 x 1 x
Version with RS232-RS485/422 & WiFi 2 x 2 x 1 x 1 x 1 x 2 x 1 x 1 x 1 x
Version with RS232-RS485-ETH board 2 x 2 x 1 x 1 x 1 x 3 x 1 x 1 x
Version with RS232-RS485-ETH & WiFi 2 x 2 x 1 x 1 x 1 x 3 x 1 x 1 x 1 x
Version with RS485-RS485 2 x 2 x 1 x 1 x 1 x 2 x 2 x
Table 1: Router versions
Figure 6: Basic version (plastic)
Figure 7: Basic version with WiFi (plastic)
Figure 8: Basic version (metal)
Figure 9: Basic version with WiFi (metal)
SmartFlex SR304 Hardware Manual 6

3. Router Design 3.1 Router versions
Figure 10: Version SWITCH (plastic)
Figure 11: Version SWITCH and WiFi (plastic)
Figure 12: Version RS232-RS485 (plastic)
Figure 13: Ver. RS232-RS485 & WiFi (plastic)
Figure 14: Version RS232-RS485-ETH (plastic)
Figure 15: Version SWITCH (metal)
Figure 16: Version SWITCH and WiFi (metal)
Figure 17: Version RS232-RS485 (metal)
Figure 18: Version RS232-RS485 & WiFi (metal)
Figure 19: Version RS232-RS485-ETH (metal)
SmartFlex SR304 Hardware Manual 7

3. Router Design 3.2 Product Revisions
Figure 20: RS232-RS485-ETH & WiFi (plastic) Figure 21: RS232-RS485-ETH & WiFi (metal)
Figure 22: RS485-RS485 (metal)
3.2 Product Revisions
For the product revision history, see the table below. The revision number is printed on the packaging
and product labels.
The router GUI can also display the product revision under Status -> General -> System Information ->
Product Revision. Please note that the default revision (Rev.1.0) is unavailable here.
Rev.# Description
1.0 Initial version (revision number not printed on the labels).
2.0 New SIM slot type; see PCN-2022-03 for details.
Table 2: HW Revisions History
SmartFlex SR304 Hardware Manual 8

3. Router Design 3.3 Delivery identification
3.3 Delivery identification
Trade name Product name Description
SmartFlex SR304 SmartFlex Router in a plastic or metal box
Table 3: Delivery identification
Figure 23: Label examples
SmartFlex SR304 Hardware Manual 9

3. Router Design 3.4 Order codes
3.4 Order codes
Order codes overview is shown in the table below.
Product Name Order code Features – interfaces
SR304 BB-SR3040x0yz∗LTE module for EMEA, 2x ETH, 1x USB, 2x BI,
1x BO, 1x microSD reader, 2x SIM reader
SR304 BB-SR3041x0yz∗LTE module for EMEA, 2x ETH, 1x USB, 2x BI,
1x BO, 1x microSD reader, 2x SIM reader, WiFi
SR304 BB-SR3040x1yz∗LTE module for EMEA, 5x ETH, 1x USB, 2x BI,
1x BO, 1x microSD reader, 2x SIM reader
SR304 BB-SR3041x1yz∗LTE module for EMEA, 5x ETH, 1x USB, 2x BI,
1x BO, 1x microSD reader, 2x SIM reader, WiFi
SR304 BB-SR3040x3yz∗LTE module for EMEA, 2x ETH, 1x USB, 2x BI, 1x BO,
1x microSD reader, 2x SIM reader, RS232, RS485
SR304 BB-SR3041x3yz∗LTE module for EMEA, 2x ETH, 1x USB, 2x BI, 1x BO,
1x microSD reader, 2x SIM reader, WiFi, RS232, RS485
SR304 BB-SR3040x4yz∗LTE module for EMEA, 3x ETH, 1x USB, 2x BI, 1x BO,
1x microSD reader, 2x SIM reader, RS232, RS485
SR304 BB-SR3041x4yz∗LTE module for EMEA, 3x ETH, 1x USB, 2x BI, 1x BO,
1x microSD reader, 2x SIM reader, WiFi, RS232, RS485
SR304 BB-SR3040x6yz∗LTE module for EMEA, 2x ETH, 1x USB, 2x BI, 1x BO,
1x microSD reader, 2x SIM reader, 2x RS485
Table 4: Order codes overview
∗Replace the letters "x", "y" and "z" with the values from the following tables:
Letter "x" – Power over Ethernet (PoE)
Power over Ethernet (PoE) Number "x" in code
Version without PoE 0
PoE PSE – Power Source Equipment – powers other devices 8
PoE PD – Powered Device – can be powered via Ethernet 9
Table 5: Power over Ethernet
SmartFlex SR304 Hardware Manual 10

3. Router Design 3.4 Order codes
Letter "y" – type of the router box
Type of box Number "y" in code
Plastic 1
Metal 2
Table 6: Type of router box
Letter "z" – type of the power supply connector
Type of power supply Number "z" in code
Without accessories 0
European 1
Interchangeable plug
adapters (EU, US, UK,
AUS)
5
Table 7: Type of power supply
Examples of complete order code:
Order code Features – interfaces Box Power
supply
BB-SR30408011 LTE module for EMEA, 2x ETH, 1x USB, 2x BI, 1x
BO, 1x microSD reader, 2x SIM reader, PoE PSE
plastic Europe
BB-SR30409121 LTE module for EMEA, 5x ETH, 1x USB, 2x BI, 1x
BO, 1x microSD reader, 2x SIM reader, PoE PD
metal Europe
BB-SR30400410 LTE module for EMEA, 3x ETH, 1x USB, 2x BI, 1x
BO, 1x microSD reader, 2x SIM reader,
RS232, RS485
plastic None
BB-SR30410320 LTE module for EMEA, 2x ETH, 1x USB, 2x BI,
1x BO, 1x microSD reader, 2x SIM reader, WiFi,
RS232, RS485
metal None
Table 8: Examples of order code
SmartFlex SR304 Hardware Manual 11

3. Router Design 3.5 Basic dimensions of the router box
3.5 Basic dimensions of the router box
Figure 24: Basic dimensions of the router box
3.6 Mounting Recommendations
• It is possible to place the router on a flat surface,
• DIN rail EN 60715 with the included plastic or metal clip.
For most applications with a built-in router within a switchboard, it is possible to recognize two kinds of
environments:
• A non-public, industry environment of low voltage with high interference,
• a public environment of low voltage and without high interference.
For both of these environments, it is possible to mount the router to a switchboard, after which there is
no need to have examination immunity or issues in connection with EMC according to EN 61439-1:2011.
In compliance with the EN 61439-1:2011 specification, it is necessary to observe the following as-
sembly instructions for a router attached to a switchboard:
• For whip antennas it is recommended to observe a minimum distance of 6 cm from cables and metal
surfaces on every side in order to avoid interference. When using an external antenna separate from
the switchboard it is necessary to fit a lightning conductor.
• When mounting a router on sheet-steel we recommend using a cable antenna.
• For all cables, we recommend to bind the bunch, and for this we recommend:
–The length of the bunch (the combination of power supply and data cables) should be a max-
imum 1.5 m. If the length of data cables exceeds 1.5 m or if the cable is leading towards the
switchboard, we recommend installing surge protectors.
–Data cables must not have a reticular tension of ∼230 V/50 Hz or ∼120 V/60 Hz.
• Sufficient space must be left between each connector for the handling of cables,
• To ensure the correct functioning of the router we recommend the use of an earth-bonding distribu-
tion frame for the grounding of the power supply of the router, data cables and antenna within the
switchboard.
SmartFlex SR304 Hardware Manual 12