The following programming options are available on both uni-directional and bi-directional relays. Devices don’t have to utilize programming, but these options are available to you, should you choose to use some, all, or no programming.
- Various primary trigger configuration options
- Various override trigger configuration options
- Undervoltage Shutdown (volts)
- Undervoltage Shutdown Delay
- Undervoltage Reset (volts)
- Undervoltage Reset Delay
- Overvoltage Shutdown (volts)
- Overvoltage Shutdown Delay
- Overvoltage Reset (volts)
- Overvoltage Reset Delay
- Circuit Breaker Shutdown (amps)
- Circuit Breaker Shutdown Delay
- Circuit Breaker Reset Method
- Sleep Mode
- Sleep Mode Delay
Undervoltage shutdown (volts)…..At what low voltage threshold would you like the device to respond and de-power the loads from the source?
Undervoltage Shutdown Delay (milli-seconds, seconds, minutes, or hours)…..When the undervoltage threshold is met, after what period of time do you want the device to react? The device can respond instantly, or response can be delayed. A delay will cause the device to respond to a static voltage condition, as opposed to the instantly responding to momentary dips in voltage often seen when loads are applied. For example, in a 12 volt system, one may want to protect the battery from deep discharge by low voltage disconnecting the battery from loads at 12.2 volts. One may add a 1 minute delay to insure that the relay will not false-trip during momentary dips in voltage, and open only after the voltage 12.2 volts for at least 1 minute indicating a stable voltage condition.
Undervoltage Reset (volts) …..At what system voltage should the device close and re-power the loads? If the device has low voltage disconnected at 12.2 volts, what elevated voltage would you like the device to restore the connection? This voltage setting usually coincides with the restoration of a charging source. So if the device low voltage disconnects at 12.2 volts, when a charging source is applied, we want the device to close the connection between source and load…..so the undervoltage reset level might be 13 volts (for example) which absolutely indicates a charging source is present.
Undervoltage Reset Delay …..Once the undervoltage reset voltage is sensed, do you want the device to respond immediately or delay the response by a number of seconds or minutes?
Overvoltage Shutdown (volts)…..At what high voltage threshold would you like the device to respond and de-power the loads from the source?
Overvoltage Shutdown Delay (milli-seconds, seconds, minutes, or hours)…..When the overvoltage threshold is met, after what period of time do you want the device to react? The device can respond instantly, or response can be delayed. A delay will cause the device to respond to a static voltage condition, as opposed to instantly responding to momentary peaks in voltage often seen when loads are turned on and off. For example, in a 12 volt system, one may want to protect downstream loads from over-voltage damage. As an example, one might set a 17 volt overvoltage shutdown threshold with a 20 millisecond delay so if the device senses 17 volts for more than 20 milliseconds, the device will open and disconnect the output loads from the source.
Overvoltage Reset (volts)…..At what system voltage should the device close and re-power the loads? If the device has over voltage disconnected at 17 volts, what voltage would you like the device to restore the connection? This voltage setting usually coincides with the safe operating voltage. So if the device over voltage disconnects at 17 volts, if the device senses voltage at 14.9 volts or lower, the device will close and restore the connection between the source and loads.
Overvoltage Reset Delay …..When the overvoltage threshold is met, after what period of time do you want the device to react? The device can respond instantly, or response can be delayed. A delay will cause the device to respond to a static voltage condition, as opposed to instantly responding to momentary peaks in voltage often seen when loads are turned on and off. For example, in a 12 volt system, one may want to protect downstream loads from over-voltage damage. As an example, one might set a 17 volt overvoltage shutdown threshold with a 5 millisecond delay so if the device senses 17 volts for more than 5 milliseconds, the device will open and disconnect the output loads from the source.
Circuit Breaker Shutdown (amps)…..The device can be programmed to behave like a circuit breaker by sensing current flowing from input-to-output, if current exceeds a predefined threshold (+/- 5%), the device will “break” the circuit and open the relay. If you wish your device to have breaker functionality, specify at what amperage you’d like the device to break open. The device’s amperage rating must be above the breaking current threshold. For example, if continuous carrying current is 250 amps and you want it to break open if current exceeds 285 amps, select a 300 amp relay.
Circuit Breaker Shutdown Delay…..Do you want the device to break open instantly once the amperage threshold is detected, or delay the opening by milli-seconds, seconds, or minutes?
Circuit Breaker Reset Method…..Once the device breaks open, it can be reset remotely via a switch connected to the wires of the primary control harness, or on-board the device using a reset switch mounted on the face of the relay module.
Sleep Mode (Yes / No)…..The relay’s onboard processor is constantly running in order to preserve critical self-protection features and respond instantly to changes in voltage, load, or temperature. This requires the relay to draw current from the battery. In some applications, conservation of power is critical due to limited battery resources or periods of storage or non-use. To minimize quiescent current draw, the device can be forced into an optional sleep mode. In sleep mode, instead of constantly monitoring the electrical system, it samples the system once every 10 seconds and determines if the relay should emerge from sleep mode due to a change in system voltage or current, or if nothing has changed, go back into sleep mode for another 10 seconds.
Sleep Mode Delay….Sleep Mode can be activated instantly, or delayed by seconds, minutes, or hours after an event causing the device to open (undervoltage shutdown, overvoltage shutdown, etc…)
Alarm or Warning LED Output Signal…..Specify high or low trigger, steady-on or pulsed.