Y212-G 4G Serial Gateway Specification

Reference: Y212-G / Y212-GWR Technical Manual

Y212-G

Contents

1. Overview
2. Ordering Information
3. Key Features
4. Technical Specifications
5. Interfaces and Pin Definitions
6. Mechanical and Environmental
7. Installation and Wiring
8. Important Notes

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1. Overview

Y212-G is an industrial serial-to-4G gateway designed to bring RS232 and RS485 devices online quickly. With a built-in global LTE module, SIM slot, and SMA antenna interface, it enables plug-and-play data collection, transparent transmission, remote configuration, OTA upgrade, and alarm reporting without changing legacy field wiring.

It is well suited for PLCs, meters, sensors, pump stations, distribution cabinets, and other remote serial assets that need stable cellular backhaul and low-maintenance deployment.

Item	Description
Product Type	Industrial 4G serial gateway
Cellular Uplink	Global LTE Cat.4, Cat.1 compatible
Serial Interface	RS232 + RS485
Local I/O	2 x GPIO plus 1 x 0 to 8 V analog input
Power Input	5 to 28 VDC, optional 6 to 65 VDC wide-range version
Typical Use	Serial-to-cloud connectivity, remote maintenance, and field data collection

Highlights

• Global 4G coverage for cross-region deployments
• RS232 and RS485 in one device for easier field integration
• Built-in GPIO and analog input for simple local signal collection
• OTA, logs, and remote diagnostics reduce on-site maintenance
• Compact design supports both panel and DIN-rail installation

Typical Applications

• Smart agriculture: Collect data from temperature, humidity, and irrigation sensors and upload it to the cloud
• Industrial automation: Connect legacy PLCs and meters to cloud platforms over RS485 for remote diagnostics
• Energy monitoring: Report status and alarms from distribution rooms and PV inverters
• Environmental monitoring: Aggregate data from weather and water-quality sensors at remote stations

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2. Ordering Information

2.1 Model Naming

Y212 - G
  |     \- G: 4G / 5G cellular communication family, including LTE Cat.1
  \------- Y212: Y2 series serial data collection terminal

2.2 SKU and Configuration

SKU	Description	Network Bands	Power Range
Y212-G	Qualcomm Cat.4 global serial gateway, RS232 + RS485, 2 x IO, 1 x AD, remote maintenance support	Global 4G, 7 modes and 15 bands: LTE-FDD B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B20/B25/B26/B28; LTE-TDD B34/B38/B39/B40/B41; WCDMA B1/B2/B5/B8; CDMA2000 BC0; GSM EGSM900/DCS1800/PCS1900	5 to 28 VDC, optional wide-range version 6 to 65 VDC

2.3 Package Contents

• Y212-G main unit x1
• 4G omnidirectional antenna, SMA x1
• SIM eject pin x1
• DIN-rail clip, optional x1
• Quick-start card and warranty card

2.4 Optional Accessories

• USB-to-RS485 debug cable
• 12/24 VDC industrial power adapter
• Lightning protection kit and shielded twisted pair cable

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3. Key Features

1. Global 4G Cat.4: One device supports major global LTE bands for fast international deployment.
2. RS232 + RS485 in One Box: Connect common serial devices without adding external converters.
3. Cloud-Ready Protocols: Supports TCP, UDP, HTTP, HTTPS, MQTT, MQTTS, and WebSocket.
4. Remote OTA and Diagnostics: Configure, upgrade, and troubleshoot devices without site visits.
5. Built-In I/O and Analog Input: 2 x GPIO plus 1 x 0 to 8 V input support local status collection.
6. Wide Input, Industrial Protection: 5 to 28 VDC standard or 6 to 65 VDC wide-range input with surge and reverse-polarity protection.
7. Flexible Online Modes: Always-online, wake-up, on-demand, and scheduled modes fit different response and power needs.
8. Compact Industrial Installation: Panel or 35 mm DIN-rail mounting speeds up cabinet deployment.

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4. Technical Specifications

4.1 Wireless and Network

Parameter	Specification
Cellular Module	Qualcomm LTE Cat.4, Cat.1 compatible, backward-compatible with GPRS and EDGE, multiple hardware watchdogs
Radio Modes	Global, 7 modes and 15 bands: LTE-FDD B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B20/B25/B26/B28; LTE-TDD B34/B38/B39/B40/B41; WCDMA B1/B2/B5/B8; CDMA2000 BC0; GSM EGSM900/DCS1800/PCS1900
Protocol Stack	TCP, UDP, HTTP, HTTPS, MQTT, MQTTS, WebSocket
SIM	Drawer-style 1.8 V / 3 V SIM or USIM, full-size card
Antenna Interface	50 ohm SMA female, supports 4G and GNSS coexistence antennas
GNSS Positioning	Optional BeiDou plus GPS module with serial and server-side output

4.2 Communication Interfaces

Parameter	Specification
Main Serial Port	RS232 + RS485, shared terminal, 1200 to 921600 bps, default 9600-8-N-1
Secondary UART	TTL 3.3 V / 5 V, supported on some hardware revisions
GPIO	2 x, configurable as input or output, 3.3 V or 1.8 V logic
Analog Input	1 x 0 to 8 V, default input impedance >100 kohm
USB	Available through a debug cable for PC configuration, optional accessory

4.3 Electrical and Power Consumption

Parameter	Specification
Supply Voltage	5 to 28 VDC, standard version; 6 to 65 VDC, wide-range version
Recommended Power	Power adapter rated >=2 A
Typical Consumption	Online idle 20 to 40 mA @ 12 V; data transmission 60 to 100 mA @ 12 V; GNSS adds about 30 to 40 mA
Protection	Reverse-polarity protection, over-voltage protection, surge protection, hardware and software watchdog

4.4 Input and Output Capability

Parameter	Specification
IO1 / IO2	Configurable through GPI / GPO commands, input or output mode selectable
AD Range	0 to 8 V; for best linearity, 0 to 6 V is recommended
Sampling Mode	Periodic sampling or command-triggered sampling, with data forwarded to the server

4.5 Environmental

Parameter	Specification
Operating Temperature	-40 to 85 C
Storage Temperature	-45 to 90 C
Relative Humidity	5 to 95% RH, non-condensing
Altitude	<= 2000 m
Reliability	MTBF > 200,000 h, typical

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5. Interfaces and Pin Definitions

5.1 Terminal Definition

Pin	Signal	Description
1	IO1	Configurable digital input or output, high level 3.3 V or 1.8 V
2	232-RX	Connect to external device TX, RS232 input
3	232-TX	Connect to external device RX, RS232 output
4	485B-	RS485 differential B-
5	485A+	RS485 differential A+
6	AD	0 to 8 V analog input
7	R2-TTL	Secondary UART RX2 on Qualcomm version
8	T2-TTL	Secondary UART TX2 on Qualcomm version
9	IO2	Configurable digital input or output
10	GND	System ground
11	GND	System ground, paralleled with pin 10
12	Vin+	DC positive input, 5 to 28 V standard or 6 to 65 V wide-range

5.2 Interface Summary

Interface	Description
Power Terminal	3.5 mm pluggable 12-pin terminal, recommended 14 to 24 AWG wire, external 2 A fast fuse suggested
SIM Slot	Drawer-style full-size SIM, push-to-eject with lock support
Antenna Port	SMA female, use 4G omnidirectional or directional antenna with good grounding
LEDs	Net, Server, and Data/GPS indicators show network and data status
Reset Button	Press 3 to 5 s for soft reset; press >10 s to restore factory parameters

5.3 LED Status

LED	Status	Description
Net	Off	Network not registered
Net	64 ms on / 3 s off	Registration failed, retrying
Net	64 ms on / 1 s off	Network registered, waiting for server
Net	64 ms on / 300 ms off	Network link established
Server	Off	Not connected to center server
Server	On	Connected to center server
Data/GPS	Off	No data activity or GNSS disabled
Data/GPS	Blinking	Data TX/RX active or GNSS searching satellites
Data/GPS	On	GNSS fix acquired on positioning version

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6. Mechanical and Environmental

Item	Specification
Housing Material	Metal enclosure or ABS DIN-rail enclosure, UL94 V-0 flame retardant
Standard Dimensions	80 x 63.8 x 21.3 mm, DIN-rail version
Mounting	35 mm DIN rail, panel screws, or double-sided adhesive
Weight	About 180 g, including housing and terminal
Protection Rating	IP20, indoor installation
Cooling Clearance	Top and bottom >=15 mm, left and right >=10 mm, front >=40 mm

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7. Installation and Wiring

1. Install the antenna: Confirm the supplied 4G or GNSS antenna model, tighten it clockwise to the SMA connector, keep it vertical, and avoid metal obstruction.
2. Insert the SIM card: Use the included tool to press the yellow eject button, place an activated IoT SIM in the tray, and push it back in.
3. Wire the power input: Connect GND to pin 11 and DC positive to pin 12. Verify polarity and voltage range before power-up. An external 2 A fuse is recommended.
4. Connect the serial port: Use RS232 on pins 2 and 3 or RS485 on pins 4 and 5. Use shielded twisted pair and proper grounding. If a secondary TTL UART is required, connect pins 7 and 8.
5. Connect IO and analog signals: Wire dry or wet contacts to IO1 and IO2 as needed and keep the analog signal within 0 to 8 V.
6. Mount the device: Snap it onto a 35 mm DIN rail or secure it with screws to prevent loosening in vibration-prone environments.
7. Power on and commission: Check the Net, Server, and Data/GPS LEDs, then complete parameter configuration and connectivity testing through the serial port or remote platform.

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8. Important Notes

1. Power Requirements: Use a stable DC power source with sufficient current margin to avoid voltage drop caused by shared high-power loads.
2. Antenna Separation: 4G and GNSS antennas are not interchangeable. Keep at least 30 cm apart and ensure proper grounding.
3. Data Security: HTTPS and MQTTS are optional. They must be enabled on the platform side with correct certificate configuration.
4. Firmware Upgrade: Perform OTA only on a stable network and never power off during upgrade.
5. Lightning Protection: In outdoor or high-surge environments, use surge protection and proper grounding to protect the communication interfaces.

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• Manufacturer: Hunan YenGear Tech Co., Ltd.
• Address: Room 21014, Building 1, Fudi Xingguang Tiandi, Yingxin Road, Yuhua District, Changsha, Hunan, China
• Email: hi@yengear.com
• Website: www.yengear.com