Controlling Relays and Dry Contacts

The AT1000 provides 8 dry contact relays per device, which can be controlled individually or all at once. Each relay is addressed by its number (0-7) and the rank of the AT1000 device in a daisy-chain configuration. The rank 0 refers to the master device.

Closing and Opening Relays

The relay() function requires two parameters:

• Relay number (0-7): The specific relay on the AT1000 device.
• Device rank: The rank of the AT1000 in a daisy-chained setup (0 for the master, 1 for the first slave, etc.).

NodeJS

let relay4 = tester.relay(4, 0); // Select relay number 4 on the master device
relay4.close(); // Close relay 4 (activate)
relay4.open();  // Open relay 4 (deactivate)

// Control all relays at once
tester.relay().close();

Python

relay4 = tester.relay(4, 0)  # Select relay number 4 on the master device
relay4.close()  # Close relay 4 (activate)
relay4.open()  # Open relay 4 (deactivate)

# Control all relays at once
tester.relay().close()  

Reading Relay Status

To check whether a relay is open or closed, use the read() function, passing both the relay number and the device rank. If the read() function return 1, it means the relay is closed.

NodeJS

let relay_status = tester.relay(4, 0).read(); // Read the status of relay 4 on master device
console.log("Relay 4 status on master:", relay_status ? "Closed" : "Open");

Python

relay_status = tester.relay(4, 0).read()  # Read the status of relay 4 on master device
print(f"Relay 4 status on master: {'Closed' if relay_status else 'Open'}")

Relays / Dry contacts are not synchronized

Please note that relays operation are always sequential, and cannot be synchronized using the hold and sync mechanisms.