Overview
The ARTU100-K32 is a remote terminal unit integrating 32 digital inputs supporting active DC12V or dry contact. Data is uploaded via dual RS485 interfaces with Modbus-RTU protocol, with optional Ethernet, 2G, 4G, LoRa modules. Ideal for large power distribution systems, substation monitoring, and industrial automation requiring large-scale digital input monitoring.
Highlight
32-Channel Digital Input
- 32 DI (active/passive)
- Active: DC12V wet contact
- Passive: dry contact
- Individual status LEDs
- Pulse counting supported
Reliable Communication
- Dual RS485 ports
- Modbus-RTU protocol
- Baud rate up to 38400bps
- Optional Ethernet/4G/LoRa
- Transparent transmission
Wide Power Supply
- AC/DC 85-265V
- DC48V optional
- ≤9W (unit only)
- ≤15W (with modules)
- Industrial grade
Easy Setup & Indication
- DIN rail/wall mount
- 35 status LEDs (POW/COM/EXT/DI)
- 10-bit DIP switch
- Temp: -20~60℃
- No special tools needed
Function
| Digital Input (DI) | 32 channels, active DC12V or dry contact selectable. Read status via Modbus 02H. Debounce time configurable (ms). Pulse counting supported per channel (up to 86 DI total with expansion). |
| Event Recording (SOE) | Up to 100 events stored cyclically. Timestamp (ms) and channel status. Triggered by DI changes. Clear by writing 0xA8B8 to reg 0x2100. |
| Parameter Configuration | Modbus registers for address, baud rate, DI debounce, pulse count clear, etc. DIP switch for local/remote setting mode. |
| Modbus Function Codes | 02H: Read DI status 03H/04H: Read registers 10H: Write multiple registers Abnormal response with error codes. |
Specification
| Parameter | Value |
| Power Supply | AC/DC 85～265V or DC 48V |
| Power Consumption | ≤9W (unit only); ≤15W (with 3 modules) |
| Digital Inputs | 32 channels, active DC12V / dry contact selectable |
| Communication | 2 x RS485, Modbus-RTU, baud rate 1200~38400bps |
| Optional Communication | Ethernet (TCP/IP, 10/100M), 2G, 4G, LoRa, WiFi |
| DIP Switch | 10-bit for address/baud rate/mode setting |
| Status LEDs | 35 indicators (POW, COM, EXT, DI1-DI32) |
| Operating Temperature | -20℃ ～ +60℃ |
| Storage Temperature | -40℃ ～ +70℃ |
| Relative Humidity | ≤95% (non-condensing) |
| Altitude | ≤2500m |
| Insulation Resistance | >100MΩ (input/output to case) |
| Dielectric Strength | Power to case: AC 2kV 1min; DI to case: AC 1kV 1min |
| Dimensions (W×H×D) | 90mm × 110mm × 60mm (main unit, approx.) |
| Mounting | DIN rail or wall mounting |
| Weight | Approx. 0.3 kg |
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Expansion Modules
| Model | Description | Key Parameters |
| MKA18 | 18-ch digital input (active AC 220V) | AC 220V wet contact |
| MK18 | 18-ch digital input (passive dry contact) | Dry contact, internal power |
| MJ16 | 16-ch digital output (normally open relay) | AC 250V/3A, DC 30V/3A |
| MJC12 | 12-ch digital output (normally closed relay) | AC 250V/3A, DC 30V/3A |
| MA84 | 8-ch analog input + 4-ch analog output | AI: 0-5V/1-5V/0-20mA/4-20mA selectable; AO: same ranges |
| AWT100-WF | WiFi wireless communication terminal | 2.4GHz, 802.11 b/g/n, transparent data transmission |
| AWT100-4G | 4G wireless communication terminal | 4G network, transparent data transmission |
| AWT100-Lora | LoRa wireless communication terminal | 506.5MHz, works with ATC600 receiver |
| AWT100-LW | LoRaWAN wireless communication terminal | LoRaWAN protocol |
| AWT100-CE | Ethernet communication terminal | 10/100M Self-adaptive, TCP/IP, Modbus TCP support |
| MPOW | Power module (required when using any expansion module) | Powers the expansion modules |
Up to 3 expansion modules can be connected to one ARTU100-KJ8 main unit.
MPOW power module is mandatory when using any expansion module.
Modules can be mixed according to application requirements.
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FAQ
It supports wide-range power supply: AC/DC 85-265V or DC 48V. Users can select according to site power availability.
DI1-DI8 and DI17-DI32 share common power terminals (38, 39, 40). Ensure correct common connection. Refer to section 4.3 of the manual for details.
Two methods: 1) Local setting via DIP switch (mode 0); 2) Remote setting via Modbus commands (mode 1). DIP switches 1-5 for address, 6-7 for baud rate, 8 for mode.
ARTU100-K32 provides only DI inputs. For output control, expansion modules such as MJ16 (16 DO) or MJC12 (12 DO) can be added and controlled via the main unit’s 485 communication.
Up to 3 modules can be connected. Optional modules include MKA18/MK18 (18 DI), MJ16 (16 DO), MA84 (8 AI + 4 AO), AWT100 series wireless communication modules. MPOW power module is required.
Read registers starting from 0x5600 via Modbus. Each DI corresponds to a 16-bit counter, unit: counts. Debounce time can be configured (registers starting from 0x5100).
Summary
Key advantages: 32DI ultra-high capacity inputs, reliable dual RS485 communication, wide power supply AC/DC 85-265V, low power ≤9W, expandable up to 3 modules, supports pulse counting and SOE event recording, industrial EMC. Value: Comprehensive status acquisition of critical equipment, real-time upload to central monitoring, enhances grid and plant operational reliability.
