Y503-222-L LoRaWAN RTU, 2DI/2DO/2AI and RS485

LoRaWAN I/O RTU

Y503-222-L connects two digital inputs, two switched voltage outputs, a 0–10 V input, a 4–20 mA input and isolated RS485 to a LoRaWAN gateway and Network Server.

LoRaWAN
2 DI
2 Voltage DO
0–10 V Input
4–20 mA Input
RS485

Y503-222-L LoRaWAN RTU, 2DI/2DO/2AI and RS485

Key Features

Two digital inputs share COM and accept dry contacts or powered signals up to 28 VDC, with wiring matched to the sensor

Two switched voltage outputs follow the RTU supply voltage; they are not dry relay contacts

Separate fixed-function analog terminals: one 0–10 V AV input and one 4–20 mA AI input, with no analog output

Isolated RS485 supports configured polling and transparent transport, including Modbus RTU data

LoRaWAN 1.0.3, OTAA/ABP and Class A/Class C, with periodic, heartbeat and state-change reporting

Timed output, pulse control and local input-to-output rules require compatible firmware and a confirmed output-load rating

Specifications

LoRaWAN Radio

Protocol: LoRaWAN 1.0.3
Activation: OTAA / ABP
Device Classes: Class A / Class C
Frequency Plans: EU433, CN470 (reference), EU868, AU915, US915, AS923; region-specific hardware; specify the AS923 sub-plan when ordering
Transmit Power: -1 to 22 dBm, subject to regional configuration
Bandwidth: 125 kHz
Spreading Factor: SF7–SF12
Receiver Sensitivity: -135 dBm at SF12, BW125 kHz

Digital Inputs

Channels: 2 DI with shared COM
Signal Types: Dry contact or powered contact; NPN/PNP wiring depends on COM connection
Maximum Voltage: DC 28 V

Digital Outputs

Channels: 2 switched voltage outputs
On State Voltage: Follows the applied RTU supply voltage
Output Type: Voltage outputs, not voltage-free relay contacts or analog outputs
Current Limit: Maximum specified output current: 1 A. Contact YenGear for per-channel and combined load limits before connecting two loads.
Supply Sizing: Use a 2 A adapter when the connected output load exceeds 200 mA; budget combined loads and starting current

Analog Inputs

Voltage Input: 1 fixed AV terminal, 0–10 V
Current Input: 1 fixed AI terminal, 4–20 mA
Accuracy: ±0.5% of full scale
Reported Resolution: 0.001 V / 0.001 mA; measurement accuracy is ±0.5% of full scale
Analog Outputs: None
Maximum Input: 10.7 V at AV; 22 mA at AI. Normal measurement ranges are 0–10 V and 4–20 mA.

Serial Interface

RS485: 1 isolated RS485 A/B
ESD Protection: 15 kV
Baud Rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
Format: 8 data bits; 1 or 2 stop bits; none, odd, or even parity
Initial Setting: 9600 bps, 8-N-1
Operation: Scheduled polling and transparent transport, including configured Modbus RTU frames

Reporting And Control

Reporting: Periodic acquisition, heartbeat, and input/output state-change reporting
Control: Remote output commands; timed control, pulse output, and local input-to-output rules require compatible firmware
Commissioning: Check startup state and communication-loss behavior for the installed firmware. A radio acknowledgement does not prove that the connected equipment changed state.

Power Supply

Voltage: DC 9–28 V; use one supply for parallel power inputs
Reference Adapter: DC 12 V / 1 A; larger supply where required by output load
Maximum Working Current: 0.5 A for the RTU; budget controlled loads separately
Average Power: ≤0.5 W; load and operating conditions affect total consumption

Environmental

Operating Temperature: -40 to 85 °C
Storage Temperature: -50 to 95 °C
Humidity: 5–95% RH, non-condensing

Mechanical

Dimensions: 104 × 97.6 × 25.6 mm
Weight: Approximately 0.7 kg
Mounting: Wall or panel surface; follow supplied mounting drawing
Antenna Connector: SMA female

Deployment

Gateway Compatibility: Y501-L or Y511-L with matching regional plan and channels, using an external Network Server or optional local NS/AS
Downlinks: Class A receives downlinks after an uplink. Class C provides more receive opportunities. Delivery time depends on airtime, server scheduling and regional radio limits.
Payload: Configuration tools, uplink decoders and downlink commands must match the installed firmware