The TC 4000 electronic drive unit operates larger Pfeiffer turbo pumps and their accessories. It's purpose is to drive, monitor and control the pump. The TC 400 is designed to work with Pfeiffer HiPace 300, 350, 450, 700, and 800 turbo pumps. It requires 24 or 48 VDC input power, normally supplied by a Pfeiffer OmniControl 300 or 400 controller through a power connection cable (part number P103408, sold separately). The TC 400 drive unit supplies power to the pump, has an RS485 communication port, and two M12 ports for connecting optional accessories such as a forced air-cooling kit, a solenoid vent valve, and/or a sealing gas valve. This unit replaces a damaged drive unit, or is required for pumps that do not include a drive unit. The TCU 400 electronic drive unit has Pfeiffer part number PM C01 800 A.