• One ULN2803 high voltage and current transistor array
• LED Indication for channel status
• Screw terminal blocks for outputs
• RoHS compliant
The Elexol ULN2803 8 Channel Relay Board is a very useful accessory board that allows much higher voltage and current devices to be interfaced to the low level logic provided by the I/O24 modules.
The board consists of a ULN 2803 and LED indicator setup to indicate which channels are currently active. The ULN2803 consists of 8-bit TTL-input NPN darlington sink drivers. Each darlington driver can handle a maximum of 500mA continuous (when using a single channel only) and can withstand a maximum 50V in its off state. This makes the ULN2803 well suited to provide an interface between the low logic level interfaces and higher current/voltage devices such as relays, solenoids, motors and lamps. The connections to the board are by screw terminals that will accept cables 0.5 – 2mm. The connection between the I/O24 module and the ULN2803 switch board is via a 30 cm IDC connection cable provided with the board. The board has been designed to a 72mm standard width so that it can easily be mounted in DIN rail mounting modules.
Features:
• 1 x ULN2803 high voltage / high current transistor array
• Indication LEDs for channel status
• Screw terminal blocks for outputs
• Easy connection by 10-way box header to suit standard IDC connector for connection to the I/O port
• 72mm standard width for DIN rail modules
• Supplier code : ULN2803 Switch Board