Digital Inputs Connections; Safety Contacts - Zapi EPS-AC0 SWs&ENC User Manual

broken connection: when Vout overtakes 4.7 V or is lower than 0.3 V it is possible to
raise an alarm.

6.5 Digital Inputs connections

There are three digital inputs available.
Two of them (CNA#3 and CNA#2) must be GND connected to work properly.
CNA#3 and CNA#2 are used for the toggle switches. CNA#3 is used for the straight
ahead switch. CNA#2 is used for the 90 degrees toggle switch.
CNA#3 and CNA#2 are detected low if they are lower than 1.3 V.
CNA#3 and CNA#2 are detected high if they are higher than 6.6 V or open.
Besides there is a third digital input (CNA#1). Default choice asks CNA#1 connected
to a plus battery to work properly. For an application without CAN Bus, the
information of an active travel demand can be wired to this input (see 12.1).
CNA#1 is detected low if it is open or lower than 5.17 V.
CNA#1 is detected high if it is higher than 11 V.
By closing jumper J12 between pin 1 and 2 (now it is closed between pin 2 and 3
see Figure 4-1) it is possible to reverse CNA#1 logic. Then CNA#1 must be
connected to a minus battery to work properly.
CNA#1 is detected low if it is lower than 1.3 V.
CNA#1 is detected high if it is open or higher than 3.3 V.

6.6 Safety contacts

The Eps-ac0 provides an internal safety contact accessible through connector pins
CNA#5 and CNA#4. It should be used to stop the traction and to enable an
electromechanical brake when a steering alarm occurs. This safety contact is closed
AEMZP0EA - EPS-AC0 SWs&ENC - User Manual
Figure 6-1
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