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- AO845A
- Analog Output Module
- Sweden
- 45 mm × 102 mm × 119 mm
- 0.21kg
- 3BSE045584R1
- Xiamen, China
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ABB AO845A (3BSE045584R1) — Product Overview
Brand: ABB
Series: S800 I/O (distributed modular I/O system compatible with ABB 800xA and AC 800M platforms)
Product Introduction
The ABB AO845A (catalog number 3BSE045584R1) is an 8‑channel analog output module for the S800 I/O system. It supports 4…20 mA signals, includes HART pass‑through, and offers single or redundant configurations. Designed for demanding process environments, it delivers precision control, self‑supervision, and robust diagnostics to safeguard loop functionality.
Product Parameters
| Parameter | Specification |
|---|---|
| Number of Output Channels | 8 (unipolar, 4…20 mA) |
| HART Support | Yes – pass‑through on channels |
| Resolution | 12‑bit |
| Isolation | One group of 8 channels isolated from ground |
| Under/Over Range | –12.5 % / +15 % |
| Max Output Load | 750 Ω |
| Accuracy/Error | ≤ 0.1 % of full scale |
| Temperature Drift | ≤ 50 ppm/°C |
| Rise Time | Disable: 23 ms; Enable: up to 12.5 ms (max 4 mA) |
| Update Cycle Time | 10 ms |
| Current Limiting | Short‑circuit proof, current‑limited output |
| Max Field Cable Length | 600 m |
| Insulation Voltage | Rated 50 V; dielectric tested at 500 V AC |
| Power Dissipation | Approx. 3.5 W |
| ModuleBus +5 V Current | Max 125 mA |
| External +24 V Current | 218 mA |
| LED Diagnostics | F (Fault), R (Run), W (Warning), O (OSP – output safe position) indicators |
| Operating Temp. | 0 °C to +55 °C (some approvals for +5 °C to +55 °C) |
| Storage Temp. | –40 °C to +70 °C |
| Protection Rating | IP20 |
| Dimensions (W × D × H) | 45 mm × 102 mm (111 mm including connector) × 119 mm |
| Weight | ~0.21 kg |
Product Applications
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Controlling final devices (valves, actuators, drives) via 4…20 mA in process automation, chemical/petrochemical, water treatment, and energy production
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Implementing HART-enabled control loops without separate comms hardware
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Deployments requiring reliability and redundancy, especially where self-diagnostics is essential to reduce unplanned downtime
Product Advantages
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Precision and range: 12-bit resolution, ±0.1% accuracy, support for under/over‑range signaling
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Smart diagnostics: auto‑error detection (channel, module), OSP for safe fallback in faults
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Flexibility: HART pass-through simplifies communications with smart field instruments
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Redundancy-ready: supports both single and redundant configurations
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Compact form: fits S800 racks easily, saving panel space and enabling modular expansion
Related Models in the Same Series
| Model | Description | Key Specs |
|---|---|---|
| AO845A | This model (analog output with HART) | 4…20 mA, 8 channels, redundancy, 12‑bit |
| AO810V2 | 8‑channel analog output without HART | Similar size/weight, fast response, basic diagnostics |
| AO820 | 4‑channel, ±20 mA / ±10 V outputs | Dual‑polarity versatility |
| AO895 | 8‑channel analog output, intrinsic safety & HART | Zone-rated, HART, Ex-certified |
| AO815 | 8‑channel analog output, HART pass‑through | Self-diagnostics, 4…20 mA, S800 style |
Other Popular ABB Models (Same Brand)
| Model | Type | Feature Highlight |
|---|---|---|
| AI845 | Analog Input Module | HART-enabled analog input for loop integration |
| AO810V2 | Analog Output Module | Compact module, fast update, diagnostic LEDs |
| DI828 | Digital Input Module | High-voltage inputs, filtering, isolation |
| DO828 | Digital Output Module | 16 relay outputs, isolated channels |
| AI830A | RTD Analog Input | Temperature sensor support with redundancy |
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
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All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
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We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
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Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
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24-hour after-sales service guarantee team, professional and standardized management service system.