DO821 3BSE013250R1 Digital Output Relay 8 Ch

DO821 3BSE013250R1 module is an ideal choice for building reliable industrial automation systems. Its powerful drive capabilities and flexible voltage selection (24/48V DC) enable its wide application in critical sectors such as process automation, manufacturing, power, water treatment, and oil and gas. Whether controlling a simple pump start/stop or multiple actuators on a complex production line, the DO821 ensures that commands are executed accurately and reliably.

The DO821 is an 8-channel 230 V a.c./d.c. Relay (NC) output module for the S800 I/O. The maximum output voltage is 250 V a.c. and the maximum continuous output current is 3 A. All outputs are individually isolated. Each output channel consists of an optical isolation barrier, output state indication LED, relay driver, relay and EMC protection components. The relay supply voltage supervision, derived from the 24 V distributed on the ModuleBus, gives an error signal if the voltage disappears, and the Warning LED turns on. The error signal can be read via the ModuleBus. This supervision can be enabled/disabled with a parameter.

Technical Specifications

Attributes Specifications
Product Model DO821
Order Number 3BSE013250R1
Product Type Digital Output Module
Number of Channels  8
Output Type Transistor Output (Sink/Source)
Rated Output Voltage 24 V DC (10.2 - 75 V DC)
Maximum Output Current per Channel 0.5 A
Maximum Total Output Current of Module 4 A
Isolation Method: Channel isolation from backplane bus, inter-channel group isolation
Power Consumption (Backplane 5V) Typical 0.5 W
Compatible Controllers ABB AC 800M Series
I/O Series ABB S800 I/O
Hot-Swap Supported
Electrical Connections via a removable front connector
Safety Certifications CE, UL, ATEX, IECEx, etc. (Subject to actual product label)