The MKS 651C Pressure Controller Operating Manual provides safety, installation, setup, and operation instructions for the controller.
This manual covers safety information, unpacking, installation, and system setup for the MKS 651C pressure controller, including wiring, RS‑232 configuration, and valve selection. It also details environmental requirements and warranty information.
The guide explains local and remote operation, sensor calibration, analog and digital set points, battery‑backed memory, maintenance procedures, and includes full product specifications and command reference tables.
| Ambient temperature | 15° to 40° C (60° to 104° F) |
|---|---|
| Input power (low power unit) | 90 to 132 or 180 to 264 VAC @50/60 Hz, 75 VA max |
| Analog output signal | 0 to 5 V or 0 to 10 V, selectable |
| Physical size | 3½" H × 9½" W × 9" D (8.9 cm × 24.1 cm × 22.9 cm) |
| Weight (low power unit) | 7 lb 3 oz (3.26 kg) |
MKS warrants the equipment for one year from the date of shipment.
Refer to the “How To Change the Line Voltage” section in Chapter Two for the procedure.
The controller operates between 15 °C and 40 °C (60 °F to 104 °F).