Temperature Control

Energetika-VDS DT Programmable Ambient Temperature Regulator

Programmable ambient-temperature regulator with ten memory registers plus weekend register, RTC scheduling, ±1 s/day accuracy, and 2-year lithium backup. 10 A or 20 A relay variants.

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Overview

DT is the programmable ambient regulator in our Energetika-VDS temperature line. Two-line LCD shows ambient temperature and active set-point with current time and date. Operator stores up to ten programmable time / temperature points per day plus a separate weekend register; the regulator switches the relay automatically against the calendar. ±1 °C set-point accuracy, ±1 s/day RTC drift, 3.6 V lithium backup retains schedule for 2 years without mains. Two variants share the same board: DT-10 (10 A relay) and DT-20 (20 A relay), selected at order time.

Key features

Ten programmable time / temperature set-points per day
Separate weekend memory register with operator-selected start day
Real-time clock with ±1 s/day accuracy
3.6 V lithium backup retains schedule for 2 years
Two relay-rating variants share one board, one BOM, one assembly line

Variants

DT-10

10 A relay variant, drives loads up to ~2 kW resistive.

Relay rating: 10 A, 220 V AC, 50 Hz
Order code: DT-10

DT-20

20 A relay variant, drives loads up to ~4 kW resistive.

Relay rating: 20 A, 220 V AC, 50 Hz
Order code: DT-20

How it is used

Rooms, offices, refrigerators, and light-industrial processes where ambient temperature must follow a daily schedule rather than a fixed set-point. Operator stores ten time/temperature points plus a weekend register; the unit switches the relay automatically against the RTC.

How we build it

Single-board ambient regulator built on our DDM Novastar line. SPR-45 prints SAC305 paste; LS60 places the temperature ADC, MCU, RTC crystal, lithium backup holder, LCD ZIF, and the relay coil driver under vision check. The 10 A or 20 A relay is selected at order time and placed by hand before reflow. GF 120HC reflows at 245 °C. AOI on every joint.

Assembled on our in-house Novastar SMT line: SPR-45, LS60, GF-120HT.

Optical inspection and test

AOI inspects placement, RTC crystal alignment, LCD seating, relay polarity, and solder fillet on the relay contact pads. Functional check at the line: relay switch at the ambient set-point, RTC drift under temperature, and backup-retention behaviour after a 24-hour power-off.

Design specifications

Mechanical

Wall-mount enclosure 96.4 × 142.4 × 44.7 mm.

Electrical

220 V AC at 50 Hz. Relay rating per variant: DT-10 = 10 A, DT-20 = 20 A at 220 V AC. ±1 °C set-point accuracy.

Environmental

Ambient probe -10 to +40 °C, ±0.5 °C high-temperature converter accuracy at 25 °C.

Communication

No external comms. RTC ±1 s/day. 3.6 V lithium backup retains schedule for 2 years without mains.

Specifications

Nominal voltage: 220 V AC, 50 Hz
Temperature measurement range: -10 to +40 °C (ambient)
High temperature converter accuracy at 25 °C: 0.5 °C max
Programmable memory registers: 10 weekday + 1 weekend
RTC accuracy: ±1 s/day
Backup supply: 3.6 V lithium, 2 years
External dimensions: 96.4 × 142.4 × 44.7 mm
Wiring: F/0 mains + F/0 relay output, screw terminals on PCB