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Total Lan Ports▾
028
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06
Power input type 1▾
ACDC
3800380
Power input type 2▾
ACDC
3800380
Operational Temperature▾
-4085
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Ingress Protection▾
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EMG8508 Series

8-Port EN 50155 Certified Railway IP67 waterproof Managed Gigabit PoE Switch

  • 8 x 10/100/1000 BASE-T(X) ports, M12 connector
  • Up to 8 x 802.3af or 802.3at compliant PoE ports providing maximum 240W PoE power budget
  • EN50155, EN50121-4, IEC60571 and UL 61010-2-201 certified
  • Redundant power input, DC or High Voltage DC
  • Ruggedized IP67 aluminum enclosure
  • Works from -40°C~70°C
  • 2x Relay outputs, 5-pin M12 A-Coding
  • Security features based on IEC62443-4-2

ATOP’s EMG8508 IP67-rated Railway-compliant Ethernet switch is the best solution for providing high-speed Gigabit connectivity in track-side or on-board Railway applications. Its rugged, aluminum enclosure can effectively protect the Switch core in any environment.

The 8-M12 Connectors Gigabit ports can supply up to 30W of PoE Power (802.3af or 802.3at) to your PoE device providing an overall maximum budget of 240W. This makes EMG8508 the ideal solution for on-board or off-board surveillance by simplifying the wiring where it’s difficult, risky and expensive to introduce new elements.

The embedded redundant-power supply input provides a reliable and failure-proof safety mechanism to minimize down-times. EMG8508 comes in either redundant Low-Voltage DC power input (12~57 VDC, 47~57 VDC for PoE models) or in redundant High-Voltage DC power input (50~145 VDC). Each power module, including a Relay-output alarm, uses a S-coding M12 connector that makes EMG8508 ideal and simple for engineers setting up a Fault-Alarm System.

To prevent network intrusions, it is necessary to have a good accessing control mechanism that can identify, authenticate and authorize users. EMG8508 supports user account, password policy, and authentication interface managements functions that comply with IEC62443 standard.

Its IP67 housing protection, combined with a wide operating temperature of -40 to 70°C and wall mounting capacities make it suitable to most Railway applications in harsh environments or industrial field applications.
Switch Properties  
Priority Queues 8
VLAN Table 4,096
MAC-Based VLAN 512
VLAN ID Range VID 1 to 4,094
Trunk Group 4
Static IGMP Groups 128
Dynamic IGMP Groups 256
MAC Table Size 16k
Packet Buffer Size 1.5 MB
Jumbo Frame 9216 Byte
ETHERNET  
Standards IEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X)
IEEE 802.3ab for 1000BaseT(X)
IEEE 802.3z for 1000BaseX IEEE 802.3af / 802.3at for Power over Ethernet
IEEE 802.3x for Flow Control, back pressure flow control
IEEE 802.1d-2004 for Spanning Tree Protocol
IEEE 802.1w for Rapid Spanning Tree Protocol
IEEE 802.1s for Multiple Spanning Tree Protocol
IEEE 802.1Q for VLAN Tagging
IEEE 802.1p for Class of Service
IEEE 802.1X for Authentication
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.3az for Energy Efficient Ethernet
Protocols IPv4, IPv6, IGMPv1/v2/v3, IGMP Snooping,GARP,GMRP, GVRP, SNMPv1/v2c/ v3, SNMP Inform, ICMP, Telnet, SSH, DHCP Server/Relay/Client, DHCP Option 66/67/82, BootP, RARP, TFTP, NTP Server/Client, SNTP, SMTP, SMTP (Gmail), RMON, HTTP, HTTPS, Syslog, MRP (Client), LLDP, IEEE 1588 PTP V1/V2, IEEE 1588 Hardware E2E Transparent Clock, 802.1x, EAP, RADIUS, TACACS+, Mirror port, QoS, ACL, Serial Console, U-Ring, STP, RSTP, MSTP, Redundancy Compatible Ring, Voice VLAN, sFlow, PoE continue
Redundancy ITU-T G.8032 ERPS, STP, RSTP, MSTP, MRP(Manager/Client), Compatible Ring/Chain, U-Ring
Automation Profiles Modbus/TCP status registers
SNMP MIB MIB II, IF-MIB, SNMPv2 MIB, BRIDGE-MIB, RMON MIB Group 1,2,3,9, RFC RFC 1157, RFC 1213, RFC 1215, RFC 1493, RFC 1643, RFC 1757, RFC 2011, RFC 2012, RFC 2013, RFC 2233, RFC 2571, RFC 2742, RFC 2819, RFC 2863, RFC 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 2674
Interfaces Value
LED Indicators PWR1, PWR2, Alarm, Ethernet Act/Link, SFP Link, PoE, Ring
Ethernet Ports 8 x 10/100/1000BASE-T(X) auto negotiation speed - M12 connector
Console RS232 (A-coding M12 connector)
Relay Output 2 relay outputs with current carrying capacity of 1A @ 24 VDC
(through A-coding M12 connector)
Fiber Optics Portsw No
Power  
Input Voltage 50~145 VDC for High voltage product
12~57 VDC for Non-PoE models
45~57 VDC for 802.3af mode /51~57 VDC for 802.3at mode
Input Current/Power (System) 50 – 145 VDC, 0.27A max. , 13.5W (For High voltage Models)
12 – 57 VAC, 1.19A max. , 14.28W  (For Non-PoE Models)
Input Current (with PoE, full loading) 45 – 57 VDC, 3.08A max. , 138.6W (PoE 802.3af Mode, 8-ports)
51 – 57 VDC, 5.03A max. , 256.53W (PoE 802.3at Mode. 8-ports)
Power Input 2 x S-Coding M12 connectors (4 Pin)
Reverse Polarity Protection Yes
Physical Characteristics  
Housing IP67 protection according to EN 60529
Dimension (W x H x D) 216 x 232 x 72 mm
Weight 2kg
Installation Wall-mount (Optional Din-Rail Kit)
Environmental Limits Value
Operating Temperature -40°C to +70°C (-40°F to +158°F)
Storage Temperature -40°C~85°C (-40°F~185°F)
Ambient Relative Humidity 5%~95%, 55°C (Non-condensing)
Regulatory Approvals  
Safety UL/IEC/EN 61010-1, UL/IEC(CB) 61010-2-201
EMC FCC Part 15, Subpart B, Class A
EN 55032, EN 55024, EN 61000-3-2, EN 61000-3-3, EN 61000-6-2, EN 61000-6-4
Rail Traffic EN50155, EN50121-4, IEC60571, EN45545-2
Test Item Value Level
IEC 61000-4-2 ESD Contact Discharge
Air Discharge		 ±8kV
±15kV		 4
4
IEC 61000-4-3 RS 80-1000MHz 10 V/m 3
IEC 61000-4-4 EFT DC Power Port
AC Power Port
Signal Port		 ±2.0KV
±2.0KV
±2.0KV		 3
IEC 61000-4-5 Surge DC Power Port
DC Power Port
Signal Port		 Line-to Line±1.0KV
Line-to Earth±2.0KV
Line-to Earth±2.0KV		 3
3
3
IEC 61000-4-6 CS 0.15-80MHz 10 V rms 3
IEC 61000-4-8 PFMF Enclosure 50Hz 300A/m 3
RoHS Yes
MTBF 19.08 years (mean avg. per model; MIL-HDBK-217F-based prediction)
Warranty 5 Years

DIMENSIONS & LAYOUT

Product Layout
Mechanical Dimensions (Unit = mm)
Mechanical Dimensions (Unit = mm)
Mechanical Dimensions (Unit = mm)
MODEL NAME PART NUMBER M12 PORTS SFP SLOTS PoE PORTS
EMG8508 1P1EMG85080001G 8 - -
EMG8508-4PoE 1P1EMG85080002G 8 - 4
EMG8508-8PoE 1P1EMG85080003G 8 - 8
EMG8508-HV 1P1EMG85080004G 8 - -

Optional Accessories

MODEL NAME PART NUMBER DESCRIPTION
DIN-Rail Kit 70100000000062G DIN Rail accessories with screw
VESA Kit 70100000000063G VESA accessories with screw
SDR-75-24 50500752240001G DIN RAIL POWER SUPPLY / T;AC 88~264V to 24VDC 3.2A;75W
SDR-240-48 50502401480001G DIN RAIL POWER SUPPLY / T;AC 100~240V to 48V DC 5A;240W
SDR-480-48 50504801480001G DIN RAIL POWER SUPPLY / T;AC 100~240V to 48V DC 10A;480W
M12 Sealing Cap Plastic 3990079G Plastic sealing cap for unoccupied M12 plugs (1560251)
M12 Sealing Cap Metal 59908571G Metal sealing cap for unoccupied M12 plugs (1430488)
M12 screw plug Plastic 3990078G Plastic Screw Locking for unoccupied M12 sockets (1553129)
M12 screw plug Metal 59908561G Metal Screw Locking for unoccupied M12 sockets (1503302)

Datasheet

VERSION NAME TIME SIZE DOWNLOAD
v1.5 Datasheet EN 2023-10-02 789.65 KB
7 older versions

Hardware Installation Guide

VERSION NAME TIME SIZE DOWNLOAD
v2.1 EMG8508/EMG8510 Hardware Installation Guide 2024-08-20 658.52 KB
1 older version

Manual

VERSION NAME TIME SIZE DOWNLOAD
v2.0 EHG75XX/EHG95XX/RHG75XX/EMG85XX User Manual 2022-10-21 5.59 MB
v1.7 EHG75XX/ EMG85XX/ RHG75XX/ RHG95XX/ EHG95XX User Manual 2020-12-18 5.42 MB

Firmware

VERSION NAME TIME SIZE DOWNLOAD
v8.20 EHG75XX/EHG95XX/RHG7528/RHG9528/EMG85XX Firmware 2025-05-26 19.06 MB
5 older versions
v7.92 EMG85XX Firmware 2024-12-20 18.44 MB
v2.88 EHG75XX Firmware 2020-12-18 14.48 MB
1 older version

MIB

VERSION NAME TIME SIZE DOWNLOAD
EMG85XX MIB 2022-12-05 20.71 KB

Utility

VERSION NAME TIME SIZE DOWNLOAD
v5.60 Management Utility for Windows 2021-01-18 23.65 MB
1 older version
See in NMU Network Management Utility 2020-10-19

STP/DXF drawings

VERSION NAME TIME SIZE DOWNLOAD
EMG8508 STP 2024-12-20 7.62 MB

Test reports

VERSION NAME TIME SIZE DOWNLOAD
EMG85XX Declarations of Conformity 2023-03-20 316.20 KB
v1.0 EMG8508-EMG8510 Certifications CE 2019-11-19 3.55 MB
v1.0 EMG8508-EMG8510 Certifications EN45545 2019-11-19 1.79 MB
v1.0 EMG8508-EMG8510 Certifications EN50155 EN50121-4 2019-11-19 5.13 MB
v1.0 EMG8508-EMG8510 Certifications FCC 2019-11-19 1.28 MB
v1.0 EMG8508-EMG8510 Certifications IEC(CB) 2019-11-19 462.75 KB
v1.0 EMG8508-EMG8510 Certifications IEC60571 2019-11-19 3.94 MB
v1.0 EMG8508-EMG8510 Certifications UL 2019-11-19 12.81 MB

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