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K-96 Digital Real Time Counter

Energy & Metering

K-96 Digital Real Time Counter

Single-phase digital real-time operating-hour counter with dual 10 A relays (tariff and maxigraph), 1-minute resolution, and 72-hour lithium backup.

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Overview

K-96 is our entry-level digital RTC-relay product. Two independent 10 A / 230 V relays drive a tariff output (R1) and a max-demand maxigraph output (R2). 4-digit LED display, 1-minute resolution on lapsed time, and a 3.6 V lithium backup that retains the clock and counters for 72 hours through a mains outage. Used in HVAC service, building management, and tariff-zone signalling.

Key features

  • Two independent 10 A relays (tariff + maxigraph)
  • 4-digit LED display with H / M / P / U-I navigation buttons
  • 3.6 V lithium backup, 72-hour clock retention
  • Sealed terminal block under hinged cover with lead-seal points

How it is used

Building services and small commercial sites use the K-96 to log operating time on motors, pumps, HVAC compressors, and lighting circuits, and to provide a tariff signal (R1) plus a max-demand signal (R2) for downstream relays.

How we build it

Built on our DDM Novastar line. SPR-45 prints SAC305 paste with extra deposit on the relay and mains-side pads. LS60 places the controller, RTC crystal, lithium backup cell holder, mains-side components, and small signals under vision check; the two 10 A relays go in by hand before reflow. GF 120HC runs an 8-minute SAC305 profile peaking 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 every board: relay solder coverage on the high-current pads, RTC crystal alignment, battery holder polarity, mains isolation gap, and every passive placement. Functional test (when the customer test plan requires it) at a partner test house: each relay exercised, lapsed-time counter increment verified against a reference, and battery-backed retention checked across a power-cycle.

Design specifications

Mechanical

Wall-mount enclosure 147 × 213 × 59 mm, mounting-hole pitch 96 mm, sealed terminal block under hinged cover, weight 0.70 kg.

Electrical

220 V at 50 Hz, two 10 A / 230 V relays (R1 tariff, R2 maxigraph), accuracy ±1 s/day.

Environmental

Working temperature -20 to +70 °C, storage -40 to +80 °C.

Communication

3.6 V lithium backup retains RTC and counters for 72 hours without mains. Shortest lapped time 1 minute. Front panel: 4-digit LED display, H/M/P/U-I buttons, R1 status LED.

Specifications

Nominal voltage
220 V
Frequency
50 Hz
Outputs
R1 tariff + R2 maxigraph, 10 A / 230 V each
Working temperature
-20 to +70 °C
Storage temperature
-40 to +80 °C
Accuracy
±1 s/day
Backup supply
3.6 V lithium, 72 h
Shortest lapped time
1 minute
Dimensions
147 × 213 × 59 mm
Mounting pitch
96 mm
Weight
0.70 kg

Services used to build this

Relevant industries

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