Key facts: Hinet's EN50155 industrial Ethernet switches are available in IP40 and IP67 protection levels, all rated -40°C to +75°C operating and -40°C to +85°C storage, 5~95% non-condensing humidity, DC input 44~57VDC and MTBF 200,000 hours. EN50155 certification and IP ingress protection are independent dimensions: EN50155 does not require IP67. M12 coding is tied to speed class: D-code = 100M, X-code = Gigabit. EN 61373 covers shock and vibration separately (category/class by installation), and EN 50121-4 covers railway EMC.
EN50155 Certification and IP Protection: Common Misconceptions
Q1: Does an EN50155 industrial Ethernet switch have to be IP67 waterproof?
Short answer: No. EN50155 certification and IP ingress protection are independent dimensions, and EN50155 does not mandate IP67.
Hinet's EN50155 industrial switch range contains 20 models across two protection levels:
- IP40 aluminum housing (metal, non-sealed): IS1005-4P-M12, IS1008-8P-M12, IS1605-4P-M12, IS1608-8P-M12, IS1808F2-8P-M12, TNS1008-8P.
- IP67 sealed aluminum housing: IWS1005-4P-M12, IWS1008-8P-M12, IWS1605-4P-M12, IWS1608-8P-M12, IWS1808-8P-M12, IWS3008-8P-M12.
- BYPASS series: IS3008/3012/3016/3020 E4BP/G4BP models (IP rating currently marked as pending verification).
The correct choice depends on installation location:
| Installation location | Recommended protection | Reason |
| Onboard equipment cabinet / sealed enclosure | IP40 is sufficient | The cabinet itself provides the barrier |
| Trackside / tunnel entrance / exposed pole | IP67 required | Direct exposure to rain, spray and condensation |
| Underground mining / high dust with water | IP67 required | Dust plus water exposure |
Request the IEC 60529 test report with tested conditions. A metal housing description alone does not establish an IP rating.
Q2: What is the operating temperature range of EN50155 industrial Ethernet switches?
Short answer: The operating range is -40°C to +75°C and the storage range is -40°C to +85°C, with 5~95% non-condensing humidity across the Hinet EN50155 range.
- Operating temperature is the powered range; storage temperature applies to unpowered units in transit.
- A wide temperature rating does not mean PoE output stays at full power at the extremes. High-temperature PoE derating curves are not published on the product pages.
- Projects requiring full load across the whole range should request a PoE power budget table covering input voltage and temperature.
Q3: What standards does EN50155 cover for railway switches?
Short answer: EN50155 covers general environmental and electrical conditions for rolling-stock electronic equipment. Shock and vibration are governed by EN 61373; railway EMC is governed by EN 50121-4.
Hinet product pages list: IEEE 802.3/802.3u/802.3af/802.3at; EMC per FCC Part 15 and CISPR EN55022 Class A; EMS per EN61000-4-2, -4-3, -4-4, -4-5 and -4-6; industrial immunity per IEC61000-6-2; railway standards EN50155 and EN50121-4; traffic per NEMA TS-2.
| Standard | Covers | Equals "ready to install"? |
| EN 50155 | Environmental and electrical conditions for rolling stock | Baseline only |
| EN 61373 | Shock and vibration testing | Confirm category and class separately |
| EN 50121-4 | Railway EMC for signalling and telecom apparatus | Independent item |
| IEC 61000-6-2 | Industrial immunity | General industrial, not rail-specific |
An aluminum enclosure, DIN-rail mounting or a wide temperature range alone does not demonstrate EN 61373 compliance.
Q4: How do I choose between M12 D-code and X-code connectors?
Short answer: Coding determines pin definitions and cannot be mixed. D-code = 100M class, X-code = Gigabit.
IS1008-8P-M12, TNS1008-8P, IWS1008-8P-M12 and IWS1005-4P-M12 use 8 x 10/100TX M12 D-code data ports. IS1605-4P-M12, IS1608-8P-M12, IWS1605-4P-M12, IWS1608-8P-M12, IWS1808-8P-M12 and the BYPASS series use Gigabit M12 X-code ports. The power input is always M12 5-pole A-code and the console port is M12 4-pole D-code. All accessory cables in the Hinet catalog are rated IP67, but a cable rating does not by itself make the host unit IP67.
Q5: IP40 vs IP67 EN50155 models — is the upgrade worth it?
Short answer: It depends on whether the unit is exposed to water. IP40 models cost less but cannot be rained on; inside a protected onboard cabinet, IP40 is fully adequate.
| Parameter | IS1008-8P-M12 (IP40) | IWS1808-8P-M12 (IP67) |
| Operating temperature | -40°C to +75°C | -40°C to +75°C |
| Protection | IP40 aluminum | IP67 sealed aluminum |
| PoE | 802.3af/at, 30W/port | 802.3af/at, 30W/port |
| Switching capacity | 1.6 Gbps | 16 Gbps |
| MAC table | 2K | 8K |
| Ports | 8 x 100M M12 D-code | 8 x Gigabit M12 X-code |
| Size / weight | 200x110x90mm / 1.5KG | 200x110x90mm / 1.5KG |
Note the IP67 counterpart is also the Gigabit X-code model in this pairing — upgrading protection may also change the speed class, so compare interface coding, not just the IP digit.
Q6: What is the PoE power budget for EN50155 PoE switches?
Short answer: Per-port power is published (30W on ports 1-8), but whole-unit PoE total budgets are not published for these models. Request the budget table before approving multi-port deployments.
The theoretical ceiling of 30W x 8 = 240W depends on the 44-57VDC input range, boost margin to 52VDC PoE output, and unpublished high-temperature derating. For a wider look at power budgets across the range, see the DIN-rail industrial switch range.
Q7: Do EN50155 switches support redundant power inputs?
Short answer: The IS3008G4BP-8P-M12-DC lists a redundant power input (M12 A-code, 44-57VDC). Two connectors do not automatically guarantee true redundancy.
Confirm in writing: whether the two inputs are electrically isolated or internally parallel; whether switchover is seamless and the interruption duration; and whether both supplies come from genuinely independent sources.
Q8: What MTBF and EMC ratings do EN50155 industrial switches have?
Short answer: MTBF 200,000 hours (parts count reliability prediction), EMI FCC Part 15 / CISPR EN55022 Class A, EMS covering ESD/RS/EFT/Surge/CS.
The surge entry names EN61000-4-5 but does not quantify the kV test level — request a specific value for trackside projects. The IPE90-bt injector is rated 10/700µs 6kV per IEC 61000-4-5, and separate DIN-rail protectors IPV201-10KV (10KV, 100M/1000M) are available for external protection.
Q9: What ring redundancy protocols do EN50155 railway switches support?
Short answer: The BYPASS series supports RSTP, EAPS and ERPS with ring recovery under 20 ms, plus 2 pairs of passive bypass on 4 ports.
Passive bypass is a hardware-level path that keeps traffic flowing through a fiber link failure without depending on software convergence. Layer 3 support covers static routing, OSPF, RIP, VRRP and BGP; management over HTTP/HTTPS, Telnet, SSH, SNMP and Console; 24 Gbps backplane.
Q10: Which documents should a supplier provide when quoting EN50155 switches?
Short answer: Eight categories — datasheet, EN50155 declaration of conformity, EN61373 report (category/class), EN50121-4 EMC report, IEC 60529 IP report, PoE budget table (voltage x temperature), high-temperature derating curve, and written warranty terms.
Standards named on a website are not independent certification verification. Hinet publishes the technical specification, temperature, humidity, voltage, IP rating, MTBF and per-port PoE power; conformity declarations, EN61373 evidence, IP test reports and derating data should be requested for the specific model. Warranty tiers are one, two and five years, with external power supplies and wireless antennas limited to three months and accessories excluded.
Quick Reference: Verified EN50155 Models
IP40 class
| Model | Ports | PoE | Temp | Page |
| IS1005-4P-M12 | 5 x 100M PoE (D-code) | 802.3af/at 30W | -40~+75°C | 57 |
| IS1008-8P-M12 | 8 x 100M PoE (D-code) | 802.3af/at 30W | -40~+75°C | 56 |
| IS1605-4P-M12 | 5 x Gb PoE (X-code) | 802.3af/at | -40~+75°C | 55 |
| IS1608-8P-M12 | 8 x Gb PoE (X-code) | 802.3af/at | -40~+75°C | 54 |
| IS1808F2-8P-M12 | 8 x Gb PoE (X-code) | 802.3af/at 30W | -40~+75°C | 53 |
| TNS1008-8P | 8 x 100M PoE (D-code) | 802.3af/at 30W | -40~+75°C | 52 |
IP67 class
| Model | Ports | PoE | Temp | Page |
| IWS1005-4P-M12 | 5 x 100M PoE (D-code) | 802.3af/at 30W | -40~+75°C | 63 |
| IWS1008-8P-M12 | 8 x 10/100M PoE (D-code) | 802.3af/at 30W | -40~+75°C | 62 |
| IWS1605-4P-M12 | 5 x Gb PoE (X-code) | 802.3af/at | -40~+75°C | 61 |
| IWS1608-8P-M12 | 8 x Gb PoE (X-code) | 802.3af/at 30W | -40~+75°C | 60 |
| IWS1808-8P-M12 | 8 x Gb PoE (X-code) | 802.3af/at 30W | -40~+75°C | 59 |
| IWS3008-8P-M12 | 8 x Gb PoE (X-code) | 802.3af/at 30W | -40~+75°C | 58 |
BYPASS series (IP rating pending verification)
IS3008G4BP-8P-M12-DC, IS3008E4BP-8P-M12-DC, IS3012G4BP-12P-M12-DC, IS3016G4BP-16P-M12-DC and IS3020G4BP-20P-M12-DC: 802.3af/at 30W, -40~+75°C, 44-57VDC, 24 Gbps backplane. Confirm the IP rating with the supplier before approval.
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