Remote Signaling & Control Unit
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Remote signaling and control units from YADA Electronics — a Guangdong-based manufacturer (Beijing Stock Exchange: 920556) building Modbus remote I/O for substation automation, plant telemetry and unmanned site control. This category holds the YM-D16K8, a 16-channel digital input / 8-channel relay output module on RS-485 Modbus RTU.
What Remote I/O Solves
Metering tells you how much energy passed a point. It does not tell you whether a breaker is open, a door is ajar, a pump is running or a fault relay has picked up — and it cannot switch anything. Remote I/O covers that gap: dry-contact status in, relay control out, on the same RS-485 bus the meters already use. On an unmanned site this is the difference between reading data and actually operating the installation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | YM-D16K8 |
| Digital inputs | 16 channels, discrete signal acquisition |
| Relay outputs | 8 channels |
| Communication | RS-485 Modbus RTU |
| Operating mode | Remote acquisition and control; input-driven relay output can be configured |
| Integration | Shares the RS-485 bus with YADA meters, analysers and sensors |
Typical Applications
- Substation and switchroom telemetry — breaker position, trip-relay status and alarm contacts.
- EV charging sites — cabinet door status, emergency-stop position, contactor control.
- Data centres — combining with water-immersion and temperature sensors for facility alarms.
- Unmanned solar and storage sites — remote reset and isolation without a site visit.
- Industrial plant — machine run / fault status collected alongside energy data.
How To Specify A Remote I/O Module
- Count the dry contacts you need to read and the circuits you need to switch, with spare channels for later additions.
- Confirm the contacts are volt-free — discrete inputs expect dry contacts, not live signals.
- Check the relay rating against the load being switched; use an interposing contactor for anything substantial.
- Confirm the Modbus address range is free on the existing RS-485 bus.
- Decide whether any input should drive an output locally — that mapping is configurable and keeps safety interlocks working if the master is offline.
Frequently Asked Questions
Can it share the RS-485 bus with the energy meters?
Yes — that is the intended deployment. One master polls meters, analysers, sensors and the I/O module on the same bus, provided Modbus addresses do not collide.
Can an input switch an output without the master?
Yes. The unit can be set so a discrete input controls a relay output directly, which keeps local interlocks working when the communication link is down.
What can the relay outputs drive?
Confirm the relay contact rating against your load. For motors, heaters or contactors, drive an interposing contactor rather than the load directly.
Related Product Categories
- Environmental Sensors — temperature, humidity and water-immersion inputs for the same site.
- Power Meters — electrical measurement alongside the digital status.
- AC Energy Meters — energy accounting on the same RS-485 bus.
- Power Quality Analyzers — condition monitoring for the monitored switchboard.
- Surge Protection Devices — protecting the signal and power circuits at the cabinet.
Request A Remote I/O Quote
Send the number of dry contacts to read, the circuits to switch and their load, the existing RS-485 bus layout and any local interlock behaviour you need.