NewTrend · Asymmetric cycler timer relay
Product overview
NewTrend RT8-S1 provides repeated ON/OFF cycles with independently adjustable t1 and t2 intervals. An external jumper between S and A1 selects a cycle beginning with a pulse or a pause. The 18mm DIN-rail housing has 1 SPDT output contacts and separate supply and output indicators. Choose AC/DC 12-240V (W240) or AC 230V (A230) control supply.
Technical selection summary
| Model | RT8-S1 |
|---|---|
| Output contacts | 1 SPDT |
| A230 power input | AC maximum 6VA / 1.3W |
| Weight | W240: 63g; A230: 62g |
| Function | Asymmetric cycler; pulse-start or pause-start |
| Supply terminals | A1-A2 |
| Control supply options | W240: AC/DC 12-240V; A230: AC 230V; 50-60Hz |
| Supply tolerance | -15% to +10% |
| W240 burden | AC 0.09-3VA / DC 0.05-1.7W |
| Supply indication | Green LED |
| Time setting | Independent t1 and t2; range selector and 10%-100% potentiometer |
| Marked time ranges | 1s, 10s, 1min, 10min, 1h, 10h, 1day, 10days, 30days, 100days |
| Time setting deviation | 10% with mechanical adjustment |
| Repeat accuracy | 0.2% of set value |
| Temperature coefficient | 0.05%/degree C at 20 degrees C |
| Contact rating | 16A, AC-1 |
| Switching voltage | 250VAC / 24VDC |
| Minimum DC breaking power | 500mW |
| Output indication | Red LED |
| Mechanical life | 10,000,000 operations |
| Electrical life (AC-1) | 100,000 operations |
| Reset time | Maximum 200ms |
| Operating temperature | -20 to +55 degrees C |
| Storage temperature | -35 to +75 degrees C |
| Mounting | DIN rail to EN/IEC 60715 |
| Protection | IP40 front panel; IP20 terminals |
| Operating position | Any |
| Overvoltage category | III |
| Pollution degree | 2 |
| Maximum conductor size | Solid: 1 x 2.5mm2 or 2 x 1.5mm2; with sleeve: 1 x 2.5mm2 (AWG 12) |
| Terminal tightening torque | 0.4Nm |
| Body dimensions | 90 x 18 x 64mm |
| Referenced standards | EN 61812-1; IEC 60947-5-1 |
Choose the control supply to match the installation. Set each interval with its marked range and fine-adjustment knob. Confirm the required initial output state and load utilization category when enquiring.
Typical applications
- Periodic ventilation and dehumidification
- Cyclic lighting and illuminated signs
- Circulating-pump and repetitive control circuits
Specify your enquiry
For a focused quotation, include:
- Control supply version: W240 or A230
- Required t1 and t2 intervals and pulse-start or pause-start operation
- Load type, operating voltage, quantity and delivery destination
Download NewTrend RT8-S1 datasheet (PDF)
Product reference images and drawings
Wiring diagram
Pulse-start and pause-start timing diagrams
Common housing dimensions (RT8-S1 front view)
Set t1 and t2 independently. Interval = marked range x fine-adjustment percentage. Without the A1-S jumper, cycling begins with a pulse; with the jumper, cycling begins with a pause. Isolate power before wiring; installation must be performed by qualified electricians.
