The RG-NIS21-4G2S-HP is a six-port Layer 2 cloud-managed industrial PoE switch engineered for demanding environments. It features four Gigabit PoE ports—including one PoE++ port supporting up to 90 W—and two Gigabit SFP uplinks for flexible fibre connectivity. Built to operate from -40°C to +75°C, its rugged IP40 metal housing, 6 kV surge protection and fanless design deliver dependable performance. ERPS rapid failover, 200-metre Extend Mode and Ruijie Cloud management help maintain stable, easily managed industrial and surveillance networks.
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For full terms & conditions, please see – Ruijie Warranty T&Cs.

| PoE Out standard | PoE/PoE+/PoE++ (IEEE 802.3af/at/bt) |
| Number of PoE Out ports | 4 |
| Number of PoE/PoE+ Out ports | 4 |
| Number of PoE/PoE+/PoE++ Out ports | 1 |
| PoE budget | Default: 108 W MAX: 180 W (web reserved adjustable interface) |
| PoE power pins | Port 1: 1–2 (-), 3–6 (+), 4–5 (+), 7–8 (-) Ports 2–4: 1–2 (+), 3–6 (-) |
| Power input | DC input: • Rated voltage range: 46 V DC to 57 V DC • Rated current range: 4.2 A RG-NIS-PA240-48 (AC input): • Rated input voltage: 100 V AC to 240 V AC, 50/60 Hz • Maximum input voltage: 90 V AC to 264 V AC, 47 Hz to 63 Hz • Rated input current: 3.5 A Output: • Rated output voltage: 54 V DC • Maximum output current: 4.4 A RG-NIS-PA120-48 (AC input): • Rated input voltage: 100 V AC to 240 V AC, 50/60 Hz • Maximum input voltage: 85 V AC to 264 V AC, 47 Hz to 63 Hz • Rated input current: 1.5 A Output: • Rated output voltage: 48 V DC • Maximum output current: 2.5 A |
| Maximum power consumption | 12 W (with no PoE load) 192 W (with PoE full load) |
| Power supply | • DC power adapter • Power module |
| Warranty | 5 years |
| Total number of RJ45 ports | 4 |
| Total number of optical ports | 2 |
| Number of 1GE SFP ports | 2 |
| Number of 10/100/1000BASE-T ports | 4 |
| Ultra-long-haul transmission | Yes (ports 3–4) |
| Reset button | 1 |
| DIP switch | ERPS mode: Enable ERPS ring network Isolation mode: Upper port and lower port isolation Extend mode: The rate of Ports 3 to 4 is reduced to 10 Mbps, but the maximum transmission distance can be up to 200 meters (Cat5e cables required) Alarm mode:Turn on power in-position detection alarm |
| Flash memory | 8 MB |
| Forwarding rate | 8.9 Mpps |
| Switching capacity | 12 Gbps(bit/s) |
| Casing | Metal |
| Product dimensions (W x D x H) | 50 mm x 155 mm x 130 mm (1.97 in. x 6.10 in. x 5.12 in.) |
| Weight | 0.77 kg (1.70 lbs) (without packaging materials) 1.08 kg (2.38 lbs) (with packaging materials) |
| Shipping weight | 1.08 kg (2.38 lbs) |
| Fan | Fanless design |
| Cooling | Natural cooling |
| Mounting options | DIN rail mount/Wall |
| Hot swapping of cables | Hot swapping supported by the service port and power connector |
| MTBF | 200,000 hours |
| Operating temperature | -40°C to +75°C (–40°F to +167°F) |
| Storage temperature | –40°C to +85°C (–40°F to +185°F) |
| Operating humidity | 10% RH to 90% RH (non-condensing) |
| Storage humidity | 5% RH to 95% RH (non-condensing) |
| Altitude | –500 m to +5,000 m (–1,640.42 ft. to +16,404.20 ft.) |
| Corrosion class | Salt Tolerance |
| ESD protection | Air discharge: 15 kV Contact discharge: 8 kV |
| Surge protection | Service port: ±6 kV for common mode Power connector: ±4 kV for common mode and ±2 kV for differential mode |
| EMC | IEC/EN 61000-4-2 IEC/EN 61000-4-3 IEC/EN 61000-4-4 IEC/EN 61000-4-5 IEC/EN 61000-4-6 IEC/EN 61000-4-8 |
| Safety compliance | EN 62638-1 |
| Certification | CE, FCC |
| RADIUS | No |
| 802.1X authentication | No |
| Mirroring | Yes |
| HTTP login | Yes |
| HTTPS login | No |
| SON | Yes |
| Syslog | No |
| Camera detection | Yes |
| eWeb management | Yes |
| Ruijie Cloud management | Yes |
| Ruijie Reyee App management | Yes |
| SNMPv1, v2c, and v3 | No |
| Load balancing | No |
| ERPS | Yes |
| ARP | No |
| IPv4 ping | No |
| IPv4 traceroute | No |
| ICMPv6 | No |
| IPv6 ping | No |
| IPv6 traceroute | No |
| DNS client | Yes |
| DHCP client | Yes |
| Port isolation | Yes |
| Broadcast storm control | Yes |
| Multicast storm control | Yes |
| Unknown unicast storm control | Yes |
| DHCP snooping | Yes |
| Standard ACL | No |
| Extended MAC ACL | No |
| Extended IP ACL | No |
| IPv6 ACL | No |
| ARP anti-spoofing | No |
| CPU Protection Policy | Yes |
| IGMPv1 snooping | No |
| IGMPv2 snooping | No |
| Basic IGMPv3 snooping | No |
| Full IGMPv3 snooping | No |
| IGMP filtering | No |
| IGMPv1, v2, and v3 | No |
| PoE watchdog | Yes |
| Uninterruptible power supply upon warm start | No |
| Online upgrade | Yes |
| Recommended camera limit | 200W H265: 70 400W H265: 35 |
| 802.1p priority-based traffic classification | No |
| DSCP priority-based traffic classification | No |
| Jumbo frame length (MTU) | 10000 bytes |
| EEE | Yes |
| Cable test | Yes |
| Maximum number of VLANs | 16 |
| Maximum number of MAC address entries | 8000 |
| Interface flow control | Yes |
| IEEE 802.1Q VLAN | Yes |
| VLAN configuration supported on LAN ports | Yes |
| LLDP | No |
| LLDP-MED | No |
| Static MAC address | Yes |
| Static aggregation | No |
| LACP | No |
| Inbound or outbound rate limiting based on interface traffic | Yes |
| Screw | 4 X M3 x 5 mm cross recessed countersunk head screws |
| Rack-mount bracket | 2 |
| Device | 1 |
| User Manual | 1 |
| Warranty Card | 1 |
View and download User Documents and Manuals directly from Reyee under the 'Resources' tab.