Burk Technology Command Relay
Command Relay for GSC/VRC (910-085-120)

The Command Relay unit provides isolation between a GSC I/O or VRC2500 unit and the controlled equipment. Each Command Relay unit has 8 command output channels with two relays each. Use two Command [...]

Burk Technology Modem Ext 4 Wire
External Four-Wire Modem MT2834BL

The MODEMEXT4WIRE 2-Wire/4-Wire modem is used to connect your computer to the Burk GSC3000 or VRC2500 via a dedicated two-wire or four-wire circuit. Order 2 per full-time connection.