Overview
Specification
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model / Part Number | AO890 / 3BSC690072R1 |
| Module Type | Analog Output |
| Number of Channels | 8 |
| Signal Output | Current loop (0–20 mA, 4–20 mA) |
| Resolution | 12 bit |
| Output Drive | Up to 20 mA (22 mA overload) |
| Isolation | Group‑wise isolated from ground |
| Output Load | < 725 Ω at 20 mA; < 625 Ω at 22 mA |
| Accuracy (Error) | Typ. 0.05 %, Max. 0.1 % at 650 Ω |
| Temperature Drift | Typ. 50 ppm/°C; Max. 100 ppm/°C |
| Rise Time | 1 ms (10 % → 90 %) |
| Current Limiting | Short‑circuit proof output |
| Rated Insulation Voltage | 50 V |
| Dielectric Test Voltage | 500 V AC |
| Power Dissipation | ~3.1 W |
| Current Consumption | +5 V Modulebus: 80 mA; +24 V Modulebus: Typ. 110 mA, Max. <150 mA; +24 V external: Typ. 220 mA, Max. <300 mA |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −40 °C to +70 °C |
| Humidity | 5–95 % non‑condensing |
| Protection Class | IP20 |
| Certifications | CE, IEC 61131‑2, hazardous location approvals |
| Dimensions (W×D×H) | ~45 mm × ~102 mm × 119 mm |
| Weight | ~0.20 kg |
FAQ
Q1: What does intrinsic safety mean for AO890?
Intrinsic safety means each channel limits energy so circuits remain non‑igniting in hazardous areas. It avoids external safety barriers in many cases.
Q2: Can this module support HART communications?
No, AO890 does not include a HART interface. It focuses on reliable analog current output.
Q3: What MTUs are compatible with AO890?
Use TU890 for hazardous area (Ex) and TU891 for non‑Ex applications.
Q4: Does the module support redundancy?
This module does not support redundant pair configurations. It serves as a single analog output unit.
Q5: What safety certifications does it hold?
It carries CE marking and meets hazardous location standards including ATEX Zone 2 interfaces.
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