Frequently Asked Questions (QA)

Q1: How many outputs does the AO845A provide?
A1: Eight unipolar analog outputs (4…20 mA).

Q2: Is HART communication supported?
A2: Yes—HART pass‑through is built-in to communicate with smart field devices.

Q3: What is the resolution and accuracy?
A3: It offers 12‑bit resolution and up to ±0.1% full-scale accuracy.

Q4: Does it include safety diagnostics?
A4: Yes—it supports channel/module error detection and OSP (Output Safe Position).

Q5: What load can it drive and how far?
A5: Up to 750 Ω loads and cable lengths up to 600 m.

Q6: What are its operating temperature limits?
A6: From 0 °C to +55 °C (some approvals start at +5 °C).

Q7: How big and heavy is the module?
A7: Roughly 45 × 102 × 119 mm (111 mm with connector), weighing ~0.21 kg.

Q8: Is redundancy supported?
A8: Yes—you can configure it for single or redundant setups in S800 racks.

Q9: What is the power consumption?
A9: Approx. 3.5 W; draws up to 125 mA from +5 V ModuleBus and 218 mA from +24 V.

Q10: How do diagnostics indicate issues?
A10: LED indicators (Fault, Run, Warning, OSP) display status, along with ModuleBus alerts