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Overview
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GR521 is a compact industrial cellular router that provides reliable connectivity in rigorous conditions common in industries like smart meter, monitoring, and retail.  This model is equipped with 4G LTE, DB9, and two Ethernet ports, making it ideal for quickly setting up primary and backup connectivity with remote management capabilities.


GR521 can be widely used in smart metering, video survelliance, vending machine and EV charging scenarios.


Highlights
WAN/Cellular Auto-failover
Compact Size
Dual SIM
FOTA/Remote Configuration
Multiple Network Protocols
VPN for Data Security
Technical Specification
Features
* Dual SIM backup
* 1×WAN/LAN+1×LAN
* DB9(RS232/485)
* 1×DI/1×DO
Physical Specification
* Dimension: 100×80×29.3mm
* Weight: About 183g
* Casing material: Aluminum housing
* Mounting: DIN
Operating Environment
* Normal Temp: -30℃ ~ +75℃
* Storage Temp: -40℃ ~ +85℃
* Humidity: 5%~95% RH
Mobile
* Modem: LTE Cat.4, LTE: Max. DL 150Mbps / UL 50Mbps; HSPA+: Max. DL 42Mbps / UL 5.76Mbps; EDGE: Max. DL236.8kbps/UL 236.8kbps
* Status: Signal strength (RSSI), SINR, RSRP, RSRQ, EC/IO, RSCP, Bytes sent/received, connected band, IMSI, ICCID
* SIM Management: SIM select, SIM lock
* AutoAPN
* Network select, Band lock, Used band status display
Ethernet
* WAN/LAN: WAN/LAN1, 10/100 Mbps, compliance with IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX
* LAN: LAN2, 10/100 Mbps, compliance with IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX
Serial Port
* RS-232: RX, TX, GND, Baudrate (300-115200bps)
* RS-485: A, B, Baudrate (300-115200bps)
Physical Interface
* Ethernet: RJ45 port×2, 10M/100M
* I/O: 1×Digital Input, 1×Digital Output on 4-pin power connector
* Status LED: Power, Signal, Net state, SIM Select, LAN1, LAN2, RX, TX, DI/DO
* SIM: 2×SIM slot (Mini SIM – 2FF), 1.8 V/3 V; 1×eSIM QFN 5×6 (optional)
* Antenna: SMA Female, 2 for LTE
* Power supply: 4-pin industrial DC power socket
* Serial: 2×3-pin 3.5 mm socket
* Reset: Factory reset button
* Serial: DB9
Power
* Connector: 4-pin industrial DC power socket
* Input voltage range: 5 ~ 12 VDC, reverse polarity protection
* Power consumption*: Idle: <2 W, Max: <10 W
Function
* Automatic switching to available backup connection, Mobile, Ethernet, each of which can be used as an automatic Failover
* Network Protocols: TCP, UDP, DHCP, DHCP RELAY, ICMP, NAT, HTTP, HTTPs, DNS, ARP, NTP, SSH, DDNS, MQTT etc.
* Routing: Static Routing, Policy routing etc.
* Firewall: NAT, DMZ, Port Forword, IP/MAC Filter, Access Control List
* VPN: PPTP/L2TP/GRE/IPSec
* Remote Management: HTTP, SSH, SNMP V2/V3, FOTA
Certification
* CE*, RoHS*
STANDARD ORDER CODES
* GR521-EU-LS-S
- LTE-FDD: B1, B3, B5, B7, B8, B20, B28
- LTE-TDD: B38,B40, B41
- WCDMA: B1, B5, B8
- GSM: 850/900/1800MHz
* GR521-LA-LS-S
- LTE-FDD: B1, B2, B3, B4, B5, B7, B8, B28, B66
- LTE-TDD: B38, B40
- WCDMA: B1, B2, B3, B4, B5, B8
- GSM: 850/900/1800/1900MHz
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