Light Stream DI LITE - Technical datasheet
Features
8 inputs for anything
Connect buttons, switches, reed switches, position sensors, and meters — anything that closes a contact. Up to eight devices in any combination.
Metering water, electricity, and gas
The module counts pulses from meters. Readings are not reset when power is lost.
Up to 4 commands from one button
The module distinguishes short, long, double, and "short then long" presses. Up to four different commands can be assigned to a single ordinary button.
No press is ever lost
The module counts presses itself, so the control system learns about a press even if it occurred between polls.
Rotary knobs and encoders
Up to three AB encoders or up to two ABZ encoders can be connected — for example, a brightness control knob. The remaining inputs continue to work normally.
Fast signals
Counts pulses at frequencies up to 3.1 kHz and measures the input signal frequency.
Protection against wiring mistakes
The inputs withstand from −20 to +40 V: accidentally applying power to an input will not damage the module. Any buttons and cables will work.
Testing without a computer
LEDs show the state of the inputs and the connection: close an input and you immediately see that the wiring is correct.
Dimensions
36 × 90 × 58 mm
Specifications
Ergonomics
| Parameter | Value |
|---|---|
| Mounting | 35 mm DIN rail |
| Overall dimensions (W × H × D) | 36 mm • 90 mm • 58 mm |
| Weight (with box) | 90 g |
| Controls and indication | LEDs: inputs and RS-485 communication |
Inputs
| Parameter | Value |
|---|---|
| Quantity | 8 |
| Type | "dry contact", "open collector"; group isolation |
| Input voltage | about 12 V DC |
| Current on closure | about 2 mA |
| Permissible external voltage | −20 to +40 V |
| Pulse frequency | up to 9 Hz by default; up to 3.1 kHz |
| Press types | short, long, double, "short then long" |
| Encoders | up to 3 × AB or up to 2 × ABZ |
Interfaces
| Parameter | Value |
|---|---|
| Interface | RS-485, no galvanic isolation |
| Power and RS-485 terminals | V+, GND, A, B; 3.5 mm pitch |
| Wire cross-section with ferrule | 0.35–1 mm² (single), 0.35–0.5 mm² (twin) |
| Tightening torque | 0.2 N·m |
Power supply
| Parameter | Value |
|---|---|
| Supply voltage | 9–28 V DC |
| Power consumption | 0.1 W |
| Ready after power-on | ~2 s |
Modbus
| Parameter | Value |
|---|---|
| Protocol | Modbus RTU |
| Address | 1–247, factory address on the label on the side of the enclosure |
| Baud rate | 1200–115,200 bps, default 9600 |
| Default format | 8N2 |
| Firmware update | over RS-485, settings are preserved |
Operating conditions
| Parameter | Value |
|---|---|
| Temperature | −40 to +80 °C |
| Humidity | up to 95%, non-condensing |
| Climatic design (GOST 15150-69) | O2.1* |
| Service life | 5 years |
Wiring
| Terminals | Purpose |
|---|---|
| V+, GND | power supply 9–28 V DC |
| A, B | RS-485 bus |
| Inputs 1–8 | buttons, switches, reed switches, meters, encoders |
| iGND | common wire for inputs: an input triggers when closed to iGND |
Caution
- If devices on the RS-485 bus are powered from different sources, connect their GND terminals, otherwise communication will be unreliable.
- For an encoder, reduce the debounce time on its inputs to 2–5 ms — with the factory default of 50 ms, the encoder loses steps.
Package contents
- Light Stream DI LITE
Maintenance
Connecting cables and wires must be in good condition and securely fastened. If the device works properly and no new features are needed, installing updates is not required. Before updating, it is recommended to back up the settings so that you can return to the previous version.
Safety
- Do not expose the device to rain or moisture — this will void the warranty.
- Do not remove the cover: there are no user-serviceable parts inside.
- Never connect the device to a dimmer.
- Never connect 0 V to electrical ground.
Warranty
3-year limited manufacturer's warranty (2 years for products sold before 30.09.2024).
Warranty service is not provided:
- for mechanical and other damage to the product caused by the buyer;
- for lamps, fuses, galvanic isolation and protection components;
- if the product was repaired by the buyer or by third parties;
- if the design of the product was modified;
- for equipment operated in violation of the power quality and capacity requirements of GOST 13109-97, under emergency conditions, or exposed to lightning strikes, fire or other extreme conditions;
- for product accessories (including cables, external power supplies, packaging) and parts not included in the delivery;
- if the wiring diagram or the rules of storage, transportation and operation were violated;
- if the product was exposed to chemicals or abrasive cleaning agents;
- if the product was used for purposes other than those stated in the datasheet;
- for damage caused by natural disasters or fire;
- if the manufacturer's (supplier's) label is missing.