C4 User Manual
October 25, 2021 ©2021 Smartrise Engineering, Inc. All Rights Reserved Page 15
2.1.8 24 VDC Monitoring System
The monitoring connector is used to monitor the system. All terminals have a corresponding
LED list when active.
CUP and CDN Inputs – Runs the car UP or DOWN using external run box.
MM Terminal – Puts the controller in either the Construction Mode (when the INSPECTION
switch is on) or Test mode (when the INSPECTION switch is off). To activate this input, a jumper
must be installed from 24 VDC to the input.
MB2C Terminal – Monitors the status of the B2 contactor (if used).
MBC Terminal – Monitors the status of the B contactor.
MMC Terminal – Monitors the status of the M contactor.
CEN Terminal – Monitors the status of the enable contact on the external run box during
Construction Mode. This input must be enabled before the CUP and CDN buttons.
Figure 18: 24 VDC Monitoring System Connector
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