KEY 0T0217 - Caterpillar

Digital Inputs
The inputs can be programmed for four different usage types.Disabled - Used to disable the input. No status will be shown and no action will be taken by the OCP.Status - Used to make certain system conditions be known by the OCP.System Event - Used to inform the OCP of system conditions that require the OCP to trigger an event.SCADA Data Link - Used to bring in data to the OCP for express use by the SCADA data link. The OCP will not act or trigger any events on aSCADA an input.The OCP has eight (8) programmable digital inputs and four (4) isolated programmable digital inputs. The user programmable digital inputs are referenced to Battery negative (-) and have an active range of approximately 3 VDC. The isolated user programmable digital inputs are all referenced to a common signal that is user supplied and also have an active range of approximately 3 VDC. This user supplied reference should be wired to pin 118 on the 120 pin connector of the OCP.The digital inputs of the OCP are tied to an internal pull-up resistor inside the control. Therefore, if there is no connection to a digital input, then the digital input will read as a physical high. A battery negative input should be wired to each OCP digital input.If an active high configuration is desired, then the battery negative input should be wired through a normally closed switch. If an active low configuration is desired, then the battery negative input should be wired through a normally open switch.Note: A digital input that is wired to battery positive will always remain active if programmed for active high. A digital input that is wired to battery positive will always remain inactive if programmed for active low.Note: Improper configuration of these inputs may cause a false event to be triggered or cause an event to not trigger when desired.Dedicated Digital Inputs
The OCP have dedicated digital inputs. The dedicated inputs are all referenced to a common signal that is user supplied and is the same as the user supplied reference wired to pin 118 on the 120 pin connector of the OCP.Note: The dedicated digital inputs cannot be programmed.Table 1 below outlines which functions are assigned to each of the dedicated inputs. A "Y" under a controller name indicates that the input is supported. An "N/A" under a controller name indicates that the input is not supported.
Table 1
Dedicated Inputs OCP On Screen Label Function
Digital Input #1 Y A E-STOP
Digital Input #2 Y B Remote Initiate Note: Other inputs are linked to functions that are called "SYSTEM EVENTS". "SYSTEM EVENTS" can be configured to trigger warnings or shutdowns in the OCP. System event configurations determine the OCP response to any supported event.The programming of the digital inputs starts by selecting a "Usage Type".
Illustration 1 g02296795
DigitalInput Programming Paths
If an "ACTIVE HIGH" configuration is desired, the battery negative