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ABB DI802 Digital Input Module

The ABB DI802, also cataloged as the DI802 Digital Input Module, operates as a dedicated hardware component for 120 V AC/DC discrete signal acquisition within the ABB S800 I/O system. The module provides 8 individually isolated digital input channels with current sinking signal processing, optical isolation, EMC protection, and configurable digital filtering for industrial control applications.

Hardware Specifications

Parameter	Specification
Model	DI802 3BSE022360R1
Brand	ABB
Product Type	Digital Input Module
System Platform	ABB S800 I/O
Signal Specification	120 V AC, 110 V DC
Number of Channels	8
Signal Type	Current sinking
HART Support	No
SOE Support	No
Redundancy	No
High Integrity	No
Intrinsic Safety	No
Mechanics	S800L
Input Voltage Range Logic "0"	0 to 30 V AC, 0 to 20 V DC
Input Voltage Range Logic "1"	77 to 130 V AC, 75 to 145 V DC
Input Current	10 mA at 120 V AC, 2.8 mA at 110 V DC
Input Impedance	12 kOhm AC, 39 kOhm DC
Isolation	Individually isolated channels
Filter Times	2 ms, 4 ms, 8 ms, 16 ms selectable
Input Frequency Range	47 to 63 Hz
Maximum Field Cable Length	200 m for AC, 600 m for DC
Rated Insulation Voltage	250 V
Dielectric Test Voltage	2000 V AC
Power Dissipation	Typical 2.8 W
Current Consumption +5 V Modulebus	50 mA
Current Consumption +24 V Modulebus	0 mA
Current Consumption +24 V External	0 mA
Dimensions	110 x 86.1 x 58.5 mm
Weight	0.24 kg
Operating Temp	0 to +55 deg C
Storage Temp	-40 to +70 deg C
Relative Humidity	5 to 95 %, non-condensing
Protection Class	IP20 according to IEC 60529
Power Consumption	Typical 2.8 W

Backplane Bus Communication and I/O Signal Processing

The ABB DI802 integrates with the S800 I/O backplane architecture to transfer digital input status data to the controller. The module processes field voltage signals through current limiting components, EMC protection circuits, input status LEDs, and optical isolation barriers.

Furthermore, each input channel operates independently to maintain channel separation. The module supports selectable digital filtering times of 2 ms, 4 ms, 8 ms, and 16 ms, allowing signal conditioning according to field device switching characteristics.

The input design supports industrial AC and DC discrete signals while maintaining electrical isolation between field wiring and the S800 I/O communication interface.

Frequently Asked Questions

Q: Does the ABB DI802 support redundant operation or high integrity configurations?
A: No. The DI802 does not support redundancy, high integrity functions, or SIL-related configurations. It operates as a standard S800 I/O digital input module.

Q: How does the DI802 isolate field input signals?
A: Each input channel uses optical isolation with EMC protection and current limiting components to separate field signals from internal electronics.

Q: What diagnostic functions are available on the DI802?
A: The module provides status indication through front LEDs and supports process voltage supervision on channel 8 with module error, module warning, and channel error indications.

Field Installation Guidelines

Install the ABB DI802 on the designated S800 I/O mounting arrangement and verify correct module addressing before system commissioning.

Connect field wiring according to the approved terminal assignment. Maintain separation between AC field signal cables and sensitive communication wiring to reduce electrical interference.

Use shielded cables where required by the installation environment and connect shields according to the plant grounding standard. Verify conductor size, terminal torque, and insulation condition before energizing the module.

Confirm that the field voltage matches the specified input range of 77 to 130 V AC or 75 to 145 V DC before operation. Check LED status after power-up to validate channel state and module diagnostics.

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