C1900RC Circular Chart Recorder & Controller Control Units: 1 Control Unit / 1 Pen (Red) Chart Type: Standard - Taylor (ER/C Type) Usage Certification: Standard Power Supply: 115 VAC Module Position 2: No Module Fitted / Pen Input Channel Module Position 3: No Module Fitted / Pen Input Channel Module Position 4: No Module Fitted / Pen Input Channel Module Position 5: No Module Fitted Module Position 6: No Module Fitted Includes: Totalizer Software Option