Terminal Blocks Itoh Denki terminal blocks prevent wear on the conveyor frame and connecting wires. A-200 Terminal block used with the PM570 and PM605 series AC rollers. A-270-GS/A-280-GS Terminal block compatible with the PM486BS AC roller. A-800 Terminal block used with the PM570 and PM605 AC rollers, with reduced wiring time. A-B70-G/A-B80-G Terminal block used with the PM486XE and PM486XP rollers. E-920 Terminal block compatible with the PM380AS and PM427AS AC rollers.