NewTrend · Double on-delay timer relay
Product overview
NewTrend RT8-2T combines two independently adjustable on-delay outputs in one 18mm DIN-rail module. Each interval t1 and t2 can be set from 0.1 seconds to 10 days, with ON and OFF settings. The two SPDT outputs support staged switching in control circuits.
Technical selection summary
| Model | RT8-2T |
|---|---|
| Output contacts | 2 SPDT |
| AC power input | AC maximum 6VA / 1.9W |
| Weight | W240: 82g; A230: 82g |
| Function | Two independently adjustable on-delay outputs |
| 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 range selectors and potentiometers |
| Timing range | t1 and t2: 0.1s-10days; ON; OFF |
| Marked time ranges | 1s, 10s, 1min, 10min, 1h, 10h, 1day, 10days; ON; OFF |
| 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 |
Operation
- The two outputs start timing together after supply connection. Output 15-18 transfers after t1; output 25-28 transfers after t2. The S input restarts both timing sequences as shown in the timing chart.
Typical applications
- Staged electric-heating control
- Sequential switching of control loads
- Equipment with two independent on-delay intervals
View or download RT8-2T technical catalogue (PDF)
Product reference images and drawings
RT8-2T – original specifications and connections
RT8-2T – independent delays, adjustment and dimensions
Set t1 and t2 independently using each range selector and its 10%-100% fine-adjustment knob. Each delay equals range multiplied by percentage. ON holds the applicable output on; OFF holds it off. Refer to the timing chart for control-input operation. Installation and wiring must be performed by qualified electricians.
