Description

ABB AO890 S800 Analog Output Module

Configured for 8-channel analog current output in S800 I/O systems, the ABB AO890 3BSC690072R1 (AO890 Analog Output Module) provides intrinsically safe 0-20 mA and 4-20 mA signals for direct connection to hazardous-area process equipment. Each channel incorporates intrinsic safety protection and limits overload current to 22 mA.

Hardware Specifications

Parameter	Specification
Model	AO890
Article Number	3BSC690072R1
Brand	ABB
Series	S800 I/O
Module Type	Analog Output
Origin	Not specified in provided data
Number of Channels	8
Signal Specification	0-20 mA, 4-20 mA
Signal Type	Unipolar single ended
HART	No
SOE	No
Redundancy	No
High Integrity	No
Intrinsic Safety	Yes
Resolution	12 bit
Isolation	Groupwise isolated from ground
Under/Over Range	0 / 22 mA
Output Load	Less than 725 ohms at 20 mA; less than 625 ohms up to 22 mA
Output Error	Typ. 0.05%, max. 0.1% at 650 ohms
Temperature Drift	Typ. 50 ppm/deg C, max. 100 ppm/deg C
Rise Time	1 ms, 10% to 90%
Current Limiting	Short-circuit-proof, current-limited output
Rated Insulation Voltage	50 V
Dielectric Test Voltage	500 V AC
Power Dissipation	3.1 W
Current Consumption, +5 V Modulebus	80 mA
Current Consumption, +24 V Modulebus	Typ. 110 mA, max. less than 150 mA
Current Consumption, +24 V External	Typ. 220 mA, max. less than 300 mA
Compatible MTU	TU890, TU891
Keying Code	AD
Operating Temperature	0 to +55 deg C
Storage Temperature	-40 to +70 deg C
Relative Humidity	5 to 95%, non-condensing
Pollution Degree	Degree 2, IEC 60664-1
Corrosion Protection	ISA-S71.04: G3
Protection Class	IP20 according to IEC 60529
Width	45 mm
Depth	102 mm; 111 mm including connector
Height	119 mm
Weight	0.2 kg
Power Consumption	3.1 W
CE Mark	Yes
Electrical Safety	EN 61010-1, EN 61010-2-201
EMC	EN 61000-6-4, EN 61000-6-2
Marine Certifications	ABS, BV, DNV, LR
RoHS	EU RoHS, UAE RoHS, CN RoHS
WEEE	Directive 2012/19/EU

Intrinsic Safety and Process Interface

The AO890 places intrinsic safety protection components on every output channel. Therefore, the module can interface directly with suitable Ex-certified process equipment without separate external intrinsic safety devices.

Each channel supplies up to 20 mA of loop current to a field load. Typical loads include Ex-certified current-to-pressure converters and other current-operated process devices. During overload, the output limits current to 22 mA.

The output circuit provides short-circuit protection and current limiting. Additionally, the module supervises the internal process supply and supports open-wire supervision when the configured threshold exceeds 1 mA.

For Ex applications, the TU890 Compact MTU provides the corresponding termination interface. The TU891 Compact MTU supports non-Ex applications. Both MTUs allow two-wire process connections without additional terminal components.

ABB specifies hazardous-location compatibility including ATEX/IECEx Zone 2 interfaces to Zone 0 and cFMus hazardous-location configurations. Installation must follow the applicable certification conditions and system documentation.

Frequently Asked Questions (FAQ)

Q: How many analog output channels does the AO890 provide?
A: The AO890 provides 8 unipolar single-ended analog output channels supporting 0-20 mA and 4-20 mA signals.

Q: Can the AO890 connect directly to hazardous-area process equipment?
A: Yes. Each channel contains intrinsic safety protection components for connection to suitable Ex-certified process equipment.

Q: Which MTUs are compatible with the AO890?
A: The module supports the TU890 and TU891 Compact MTUs. TU890 is intended for Ex applications, while TU891 supports non-Ex applications.

Field Installation Guidelines

Mount the AO890 on the specified S800 I/O assembly and install the compatible TU890 or TU891 MTU according to the system configuration.

Use TU890 when the application requires the specified Ex interface. Use TU891 for non-Ex process connections. Verify the selected MTU and module keying code before wiring.

Route analog output wiring separately from high-voltage power conductors and high-energy switching circuits. Maintain appropriate segregation according to the applicable installation standards.

For two-wire process devices, connect the field loop through the designated MTU terminals. Confirm polarity before energizing the output circuit.

Where shielded signal cables are used, terminate and ground the shields according to the plant grounding design and applicable EMC requirements. Avoid creating unintended ground loops.

Before commissioning, verify the configured 0-20 mA or 4-20 mA range, field-device load, wiring continuity, and process supply supervision. Confirm that the installation satisfies the applicable hazardous-area certification requirements.

Specifications

• Brand: ABB

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems