Over/Under Current Relays Series DIB01/PIB01. The DIB01 and PIB01 series from Carlo Gavazzi are TRMS over/under current monitoring relays for both DC and AC. The DIB and PIB series allow for direct measurement or measurement via a current transformer. The current monitoring relays feature an integrated latch function to maintain the relay output in the ON position. The front LEDs indicate the status of the alarm and the output relay. TRMS over/under current monitoring relays for DC and AC. Current measurement through an internal shunt. Measurement range selection via DIP switches. Adjustable current on a relative scale. Adjustable hysteresis on a relative scale. Adjustable delay function (0.1–30 s). Programmable latching or locking at set level. Output: 1-pole changeover relay, 8 A, DIN rail mount.