Standard controllers operate with a single target setpoint which is entered from the front panel. Most West controllers can also be fitted with a Dual Setpoint or a Remote Setpoint option.
Dual Setpoint
If the West controller has the Dual Setpoint Select option which uses the digital input card, the user can select between two setpoints, whose value was previously entered via the front panel. The digital input card will accept either a TTL voltage input or switch closure to select between SP1 and SP2. There are 2 terminals on the rear of the controller for the digital input card. This feature is available on the following models:
6100, 6120, 6170, 6600, 8100, 8170, 8200, 8600, 4100, 4170 and 4200.
If not requested at time of order, the digital input card can be retrofitted in the field. Please order part number M9610-W03 for the N series controls and PA1-W03 for the newer P series control.
Model 2300 controllers have two setpoint available as standard. These are selected via the front panel. The digital input option is not available on this model.
Remote Setpoint
Models 6100+, 8100+, 4100+, 4200 and 8200 can be ordered with a 2nd analog input for Remote Setpoint (RSP) which is used to adjust the setpoint to any value, relative to a voltage, mA or potentometer signal applied. For example if the 2nd analog input is set for a 4 to 20mA signal, and is scaled 0 to 200, the controllers remote setpoint would be 0 at 4mA, 100 at 12mA, 150 at 16mA etc. There are terminals on the rear of the controllers (if fitted with the RSP option) for the users to apply the 2nd analog input, and also 2 terminals to switch the controller from the RSP input to the normal Local Setpoint (as entered on the front panel).
