Boost Electronics offers Relay Interface Modules with 4C/O Configuration. Boost Electronics manufactures Automation and Control Accessories. The Relay Interface Modules with 4C/O Configuration has technical specifications like: Ordering type no.: rp230a01-4co-m No. Of channel: 1 Contact arrangement: 4 co Looping all Negative of coil supply: yes Contact rating at 30 VDC / 240 VAC: 3 amp [ resistive load ] PCB overall dimensions: 63 x 77 L x w mm.