Littelfuse RS4A22, RS Series, 120VAC, Repeat Cycle Time Delay Relay SPST-NO (1 Form A) 0.1 Min ~ 102.3 Min Delay Chassis Mount
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The RS Series is a solid-state, encapsulated, recycling timer designed for tough industrial environments. It is used by many testing labs as a life cycle tester; by others as a cycle controller. The RS Series has separate DIP switch adjustments for the on delay and the off delay. These make accurate adjustment possible the first time, every time. Time delays of 0.1 seconds to 1023 hours are available in 4 ranges.
Operation (Recycling - ON Time First)
Upon application of input voltage, the output energizes and the T1 ON time begins. At the end of the ON time, the output de-energizes and the T2 OFF time begins. At the end of the OFF time, the output energizes and the cycle repeats as long as input voltage is applied.
Reset: Removing input voltage resets the output and time delays, and returns the sequence to the ON time.
Operation (Recycling - OFF Time First)
Upon application of input voltage, the T2 OFF time begins. At the end of the OFF time, the output energizes and the T1 ON time begins. At the end of the ON time, the output de-energizes and the cycle repeats as long as input voltage is applied.
Reset: Removing input voltage resets the output and time delays, and returns the sequence to the OFF time.
*For CE approved applications, power must be removed from the unit when a switch position is changed.| Time Delay | |
| Range* |
0.1 - 102.3s in 0.1s increments 0.1 - 102.3m in 0.1m increments 1 - 1023m in 1m increments 1 - 1023h in 1h increments |
| Repeat Accuracy | ±0.1% or 20ms, whichever is greater |
| Setting Accuracy | ≤ ±2% or 20ms, whichever is greater |
| Reset Time | ≤ 150ms |
| Time Delay vs Temp. & Voltage | ≤ ± 2% |
| Input | |
| Voltage | 12, or 24VDC; 24, 120, or 230VAC |
| Tolerance | ±20% |
| AC Line Frequency/DC Ripple | 50/60 Hz / ≤ ±10% |
| Power Consumption | AC ≤ 2VA; DC ≤ 1W |
| Output | |
| Type | Solid state |
| Maximum Load Current | 1A steady state, 10A inrush at 60°C |
| OFF State Leakage Current | AC ≅ 5mA @ 230VAC; DC ≅ 1mA |
| Voltage Drop | AC ≅ 2.5V @ 1A; DC ≅ 1V @ 1A |
| Protection | |
| Circuitry | Encapsulated |
| Dielectric Breakdown | ≥ 2000V RMS terminals to mounting surface |
| Insulation Resistance | ≥ 100 MΩ |
| Polarity | DC units are reverse polarity protected |
| Mechanical | |
| Mounting | Surface mount with one #10 (M5 x 0.8) screw |
| Termination | 0.25 in. (6.35 mm) male quick connect terminals |
| Dimensions |
H 76.7 mm (3”) W 50.8 mm (2”) D 38.1 mm (1.5”) |
| Environmental | |
| Operating/Storage Temperature | -40° to 75°C / -40° to 85°C |
| Weight | ≅ 3.9 oz (111 g) |
| Humidity | 95% relative, non-condensing |