12/20/2023 0 Comments Relay load board![]() Setpoint compared to either filtered or unfiltered signal. The relay response time of counters is controlled by a selectable gate time from 10 ms to 199.99 s.įront panel pushbuttons or via PC using RS232, RS485 or USB Snubber circuitry is part of the contact relay board to prolong contact life. A programmable time delay and reduction of relay chatter can be achieved in the DPM by selecting 1 to 128 readings in binary steps (17 ms to 2.1 s) prior to updating the output. Using the filtered input reduces the chance of alarm triggering due to noise. Fast response time is one of the major strengths of the DPM-3, which can digitize analog data as often as 60 times per second. Using the unfiltered signal improves response time, which is typically 17 ms for a DPM-3 with the solid state relay board. ![]() Relay action may be derived from either the filtered or unfiltered DPM-3 input signals. Each relay may be set to operate in a hysteresis mode, where turn-on occurs at a specified amount above the setpoint and turn-off occurs at the same amount below the setpoint. In particular, band deviation is ideal to flag an out-of-tolerance condition. ![]() Each relay may be set to operate in a band deviation mode, where an alarm is generated whenever the reading is a specified number of counts above or below the setpoint. In the non-latching mode, the output is automatically reset when the alarm condition no longer exists. In the latching mode, when an alarm or shutdown condition is reached, the output remains in the alarm condition until it is reset by front panel pushbuttons, via the serial interface, or via the rear connector. Each relay may be individually programmed to operate in a latching or non-latching mode. Each relay may be individually programmed to be energized above or below a setpoint, or may be disabled.
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