CHINT · Panel-mount counting relay
Product overview
The CHINT NJJ7-M counting relay counts input pulses and provides programmable counting control for industrial equipment. Select the enhanced M model and its rated control supply; the wide-range supply version and DC 24 V version are separate choices.
Technical selection summary
| Manufacturer model | NJJ7-M; enhanced counting relay |
|---|---|
| Rated control supply | AC/DC 100–240 V, AC 50/60 Hz; or DC 24 V. Confirm the supplied unit label before wiring |
| Display / counting | CR mode: 4-digit count and 4-digit preset on red/green LEDs; CT mode: 8-digit counting using the two display sections |
| Input / speed | Contact or sensor input, NPN/PNP selectable; counting speed 1, 30 or 1000 counts/s |
| Counting modes | Addition, subtraction, reversible A/B/C; select the required sequence and output mode |
| Outputs | 1 changeover contact and open-collector output, maximum DC 30 V / 100 mA |
| Contact switching duty | AC-15: 0.75 A at 220 V, 0.47 A at 380 V; DC-13: 0.27 A at 220 V; Ith 5 A is a separate thermal reference |
| Sensor supply | External sensor power output DC 12 V, maximum 30 mA; not the relay control supply |
| Installation / standard | Panel mounting; opening reference 45.5 × 45.5 mm; −5 to +40 °C; IEC/EN 60947-5-1 |
Use the wiring and timing diagram for the exact NJJ7-M supply and counting mode. Supply voltage, sensor supply and output contact rating serve different purposes. Match sensor polarity and pulse rate; the relay output is a control contact rather than a direct motor power output. Match the complete M model and any required socket or wiring accessories.
Typical applications
- Production pulse counting and batch-count control
- Machine-cycle recording with contact or compatible sensor signals
Specify your enquiry
For a focused quotation, include:
- NJJ7-M supply version and quantity
- Counting mode, input sensor type, pulse rate, preset and output sequence
- Controlled load voltage/current, panel cut-out and wiring requirements
Product reference images and drawings
Match the exact model, construction and supplied revision. Family reference pages can show other ratings or versions.
