FAQs

Q1: What is the output type of the DO821 module?
A: The DO821 uses electromechanical relay outputs (SPST-NO).

Q2: How many channels are available on the DO821?
A: The module features 8 independent relay output channels.

Q3: Can DO821 switch both AC and DC loads?
A: Yes, it supports 24–230 V AC and 24–48 V DC switching.

Q4: Is the module hot swappable?
A: Yes, it supports hot swapping for maintenance without power-down.

Q5: What’s the maximum switching current per channel?
A: Each channel can handle up to 2 A.

Q6: Is there electrical isolation between channels?
A: Yes, both channel-to-channel and channel-to-bus isolation are provided.

Q7: Does the module provide channel status indication?
A: Yes, it has individual LEDs for each output channel.

Q8: Is this module compatible with other S800 I/O modules?
A: Yes, it’s fully compatible with other S800 modules in AC800M systems.

Q9: What is the size and weight of the DO821 module?
A: The module measures 45 x 102 x 119 mm and weighs 0.23 kg.

Q10: What applications is the DO821 best suited for?
A: It is ideal for relay-based switching of motors, lamps, valves, and alarms.