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S0 Pulse Counter with MODBUS RTU Interface – TDI340
TDI340
New product
S0 Pulse Counter with MODBUS RTU Interface
The TDI340 is a high-precision S0 pulse counter featuring a robust MODBUS RTU interface and four galvanically isolated digital inputs. Engineered for professional energy, water, gas and industrial process monitoring, it delivers reliable long-term performance thanks to non-volatile memory and a wide operating voltage range.
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Product Overview
Designed according to IEC 62053-31 requirements, the TDI340 accurately measures S0 pulses using polling or edge-triggered modes (rising, falling or both), making it suitable for demanding industrial and automation environments.
Each of the four digital inputs includes an independent counter stored in non-volatile memory, which ensures no data is lost during power interruptions.
Beyond raw pulse counting, the device provides registers for true calculated physical values, enabling direct measurement of energy, water, gas and other utility consumption.
It also offers real-time monitoring of digital input states (OPEN/CLOSE) and configurable Low-to-High / High-to-Low delay filters from 0 to 656 seconds (10 ms step) for additional digital noise suppression.
With a flexible supply range of 5–28 VDC, the TDI340 is an excellent fit for various industrial data-acquisition and automation systems.
Main Features
- RS-485 interface supporting up to 63 nodes
- Non-volatile memory for counters and settings
- Wide 5–28 VDC power supply range
- Low power consumption
- Galvanically isolated digital inputs
- Extensive communication and configuration options
- Built-in 120-ohm termination resistor
- DIN-rail mounting
- Firmware update via interface
S0 Pulse Counter Applications
- Remote electricity meter monitoring
- Industrial process control
- Remote water meter supervision
- Monitoring of devices with S0 pulse outputs
- Remote data acquisition
- Gas meter monitoring
- Energy management
- Process monitoring and analytics
Compatible With
- TCW260 Energy Monitoring Module
- Third-party MODBUS RTU master devices
Technical Specifications
| Category | Details |
|---|---|
| Dimensions | 35 × 86 × 59 mm (2-module enclosure) |
| Weight | 60 g |
| Mounting | 35 mm DIN top-hat rail |
| Operating temperature | -20 to 60°C |
| Operating humidity | 10 to 90% RH (non-condensing) |
| Storage temperature | -25 to 65°C |
| Storage humidity | 5 to 95% RH (non-condensing) |
| Ingress protection | IP40 (connections IP20) |
| Operating voltage | 5 to 30 VDC (-15/+20% IEC 62368-1) |
| Current consumption | 50 mA @ 5V |
| Isolation | Functional, 1 kV DC |
| Operating modes | OPEN/CLOSED (dry contact) and COUNTER (S0 compatible) |
| Max. count value | 2³² − 1 |
| Max. input voltage | +5.5 VDC |
| Max. source impedance (“0”) | 800 Ω |
| Min. source impedance (“1”) | 1 MΩ |
| Max. input current | 3 mA (0 Ω source impedance) |
| Max. frequency (edge mode) | 100 Hz |
| Polling period | 10 ms |
| L-H / H-L delay | 0 to 65535 × polling period; not available in edge mode |
| Protocol | Modbus RTU |
| Physical layer | RS-485 |
| Bus transceivers | Up to 63 |
| Bus cable | Twisted, shielded, 2 × 0.5 mm² |
| Response time | ≤ 50 ms |
| Master time-out | ≥ device response time + answer time |
| Connectors | 3.81 mm screwless pluggable, 28–16 AWG (0.081–1.31 mm²) |
| Warranty | 3 years |
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