This PDF file introduces the features of the DPM 742-BL 4-20mA loop powered indicator, including low voltage drop, bandgap reference, wide adjustment range, auto-polarity display, programmable decimal points, LED backlight, etc.
The DPM 742-BL is a loop‑powered 4‑20 mA current indicator with optional LED backlighting for low‑light readability. It provides zero‑adjusted indication, programmable decimal points, and can be fitted with an IP67/NEMA 4X metal bezel for harsh environments.
The manual covers product features, electrical specifications, dimensions, wiring diagrams, screw‑terminal functions, and step‑by‑step calibration procedures using jumper links. It also explains backlight power requirements and optional bezel installation.
| Accuracy (overall error) | 0.05 % (typ.) |
|---|---|
| Linearity | +1 count |
| Sample rate | 2.5 samples/sec |
| Operating temperature range | 0 °C to 50 °C |
| Temperature stability | 200 ppm/°C |
| Loop voltage drop | 5 V to 5.6 V |
| Supply current | 4 mA to 20 mA |
| Backlight supply voltage | 4.75 V to 5.0 V |
| Backlight supply current (typ.) | 30 mA (typ.) |
| Full‑scale reading @20 mA | 0 to 1999 counts |
| Offset adjustment range | -1900 to +1900 counts |
The LED backlighting operates at a typical 5 V supply with a current of about 30 mA (up to 50 mA at higher temperatures).
IP67 / NEMA 4X protection is available when the optional BEZ 700‑IP metal bezel is installed.