Chint NJJ7
Control Relay
Dual LED display counting relay supporting up to 1000 times per second counting speed with flexible sensor inputs.
Product Overview
The Chint NJJ7-M series counting relay functions as a counting and counting control component in control circuits with a rated control supply voltage of AC/DC 100V to 240V or DC24V. Designed for panel-type mounting with a 45.5 mm by 45.5 mm cutout, it features CR and CT LED display modes, selectable counting speeds up to 1000 times/s, dry contact and NPN/PNP sensor inputs, eight output modes, and over 10 years of power-off memory per IEC/EN 60947-5-1.
Technical Parameters
| Electrical life | /mechanical life(10,000 times) |
| Product type | Counting relay (NJJ7-M series) |
| Rated control supply voltage Us and frequency | AC/DC 100V~240V, 50Hz/60Hz; DC24V |
| Operating frequency | 50Hz/60Hz |
| Allowable fluctuation range of rated control power supply voltage | 85%Us~110%Us |
| Contact capacity | Ue/Ie: AC-15 220V/0.75A, 380V/0.47A; DC-13 220V/0.27A; Ith: 5A |
| Electrical life / mechanical life | 10 / 100 (x 10,000 times) |
| Ambient temperature | -5℃~+40℃ |
| Application | Counting or counting control component in control circuits |
| Wide operating voltage range note | Operates normally within the voltage range of AC/DC 100V to 240V |
| Output method | 1 group of transfer contact; open-collector output (30VDC, 100mA max) |
| Counting digits | CR mode: 4 digits (4-digit red LED count value, 4-digit green LED preset value); CT mode: 8 digits (green LED lower 4 digits, red LED higher 4 digits) |
| Counting speed | 1 time/s, 30 times/s, 1000 time/s optional |
| Counting mode | Add, subtract, reversible A, reversible B, reversible C |
| Input signal | Contact input; sensor input (NPN type, PNP type optional) |
| External sensor power supply | 12VDC, 30mA max |
| Value setting range | 0.01~9.99 |
| Output mode | N, F, C, R, K, P, Q, A |
| Output time | 0.01s~9.99s (when output mode is C, R, K, P, Q, A) |
| Power-off memory | More than 10 years (settable) |
| Standards | IEC/EN 60947-5-1 |
| Product series designation | Series NJJ7, derivative code M, control voltage AC/DC100V-240V |
| Model designation | NJJ7-M AC/DC100V-240V |
| Brand | Chint |
| Model | NJJ7 |
| Applicable standard | IEC/EN 60947-5-1 |
Key Selling Points
✓ Dual LED display providing 4-digit red count and green preset values in CR mode, or 8-digit tracking in CT mode.
✓ Selectable counting speeds of 1 time/s, 30 times/s, and 1000 times/s supporting add, subtract, and reversible A/B/C counting modes.
✓ Flexible input compatibility supporting contact inputs or NPN and PNP sensors with a built-in 12VDC 30mA external sensor power supply.
✓ Eight configurable output modes (N, F, C, R, K, P, Q, A) with adjustable output duration from 0.01s to 9.99s.
✓ Dual output configuration with 1 transfer contact group and open-collector output rated at 30VDC 100mA max.
✓ Settable power-off data retention preserving settings and count values for more than 10 years.
Technical Highlights
- Rated control supply voltage: AC/DC 100V~240V (50Hz/60Hz) or DC24V with 85%Us~110%Us allowable fluctuation.
- Contact capacity: AC-15 220V/0.75A, 380V/0.47A; DC-13 220V/0.27A; Ith 5A.
- Output arrangement: 1 group of transfer contacts and open-collector output (30VDC, 100mA max).
- Operating temperature range: -5℃ to +40℃.
- Endurance: 10 x 10,000 electrical operations and 100 x 10,000 mechanical operations.
- Mounting cutout: Panel-mount installation with 45.5 mm x 45.5 mm opening size.
- Standard compliance: IEC/EN 60947-5-1.
Selection Guide
Select the NJJ7-M counting relay model by control supply voltage of AC/DC 100V~240V or DC24V, and configure contact or NPN/PNP sensor inputs to match control circuit requirements.
Reference Datasheet Pages
The following pages were selected from the model catalogue and are included for technical reference:
NJJ7 Catalog and Technical Data
