Digilent USB-ERB24 Electromechanical Relay USB Devices

Features and Specifications

• 24 single-pole double-throw (SPDT)
• Supports configurations as two banks of eight and two banks of four
• 6 amps at 240 VAC/28 VDC
• 72-pin screw terminal
• Contact resistance: 100 megohm max (initial value)
• Onboard switches to configure the logic polarity (active high or low) and power-on state for each relay group
• Daisy Chain Support: Use standard/included USB cable for communications daisy chain; user-supplied custom cable required for power daisy chain

*Please Note: Due to EU regulations, we are unable to ship the MCC USB-ERB08 and USB-ERB24 to EU countries.

USB-ERB Series Overview

The USB-ERB Series enables a PC or laptop to control eight to 24 Form C single pole double-throw (SPDT) electromechanical relays. All devices in these series come in a heavy-duty metal enclosure with integrated mounting slots, which ensures that the devices are rugged enough for any DAQ application whether it is mounted on a DIN rail or on a bench.

Relay Contacts and Connectors

The USB-ERB Series devices provide screw terminal connections to the relay contacts: normally open (NO), normally closed (NC) and common (C). Relays on all devices are controlled by digital I/O lines.

Relay Configuration Switches

USB-ERB Series devices have two onboard switches for configuring the relay logic polarity and output relay power-up state for each relay bank/SSR module group. The current configuration of each switch can be read back with software. Devices are shipped with all relay banks/module groups configured for non-inverted logic and pull-up (relays/modules inactive on power-up).

What's in the Box

• USB-ERB24 24 channel Device
• USB cable
• 9 V power supply
• DAQami Quick Start Printed Insert