This is a MKS Granville Phillips Process Control Module provides the 307 Vacuum Gauge Controller with single-pole, double-throw relays that may be controlled either by (6 digital setpoints) or by the built-in manual override switches. This Process Control Module has 6 user selectable channels. The first 2 channels are assigned to the ion gauges. If present, channels 3 and 4 are assigned to CGA or TCA; and 5 and 6 to CGB, TCB, or CMB. Switches are provided to assign channel 1 to IG1, IG2, or both; and likewise for channel 2. All six channels have selectable polarity for activation above or below the setpoint. For Process Control Card (module) installation procedures see pages 16-27 of instruction manual.pdf. For specs and procedures for use, see Chapter 5 of the instruction manual. This is the Process Control Card Module (with 6 setpoints) ONLY, MKS Granville Phillips 307 Controller, Cables and Accessories sold separately on this website. The MKS Granville Phillips 307 Vacuum Gauge Controller Instruction Manual.pdf can be downloaded below at DOWNLOADS: