Smartrise C4

C4 User Manual
Page 20 ©2021 Smartrise Engineering, Inc. All Rights Reserved October 25, 2021
Figure 22: MR Board SR3032 Inspection Control
2.1.13 Safety Relays
SFM – The force guided relay that is controlled by the main processor. The status of the relay is
monitored by both the main processor and the safety processor. When the relay is active,
contacts that are in series with SFP output voltage to the SAFE terminal are used to control the
motor contactor.
SFP – The force guided relay that is controlled by the safety processor. The status of the relay is
monitored by both the main processor and the safety processor. When the relay is active,
contacts that are in series with SFM output voltage to the SAFE terminal are used to control the
motor contactor.
EB1 – The force guided relay that is controlled by the safety processor. The status of the relay is
monitored by both the main processor and the safety processor. When the relay is active,
contacts that are in series with EB2 pass through voltage from the EBS terminal to the EB
terminal.
EB2 – The force guided relay that is controlled by the main processor. The status of the relay is
monitored by both the main processor and the safety processor. When the relay is active,
contacts that are in series with EB1 pass through voltage from the EBS terminal to the EB
terminal.
EB3 – The force guided relay that is controlled by the safety processor. The status of the relay is
monitored by both the main processor and the safety processor. When the relay is active,
contacts that are in series with EB3 pass through voltage from the EBS terminal to the EB
terminal.