Installation Guide

Installation
14
Relay connection
Fail Safe Lock
In order to use the Fail Safe Lock, connect N/C relay as shown in the figure below. There is normally a current flowing through the
relay for the Fail Safe Lock. When the relay is activated, blocking the current flow, the door will open. If the power supply to the
product is cut off due to a power failure or an external factor, the door will open.
NOTE
• Install a diode at both sides of the door lock wire as shown in the figure to protect the relay from the reverse current, which occurs
when the door lock operates.
• Take caution of the installation direction of the diode. Install the diode close to the door lock.
• Use a separate power supply for BioEntry W2 and the door lock.
• Suprema’s standalone intelligent readers contain internal relays that can directly lock/unlock doors without external controllers for
added convenience. For access control applications in need of security, however, it is NOT recommended to use the internal relay of
a reader to prevent any tampering attacks which can potentially trigger the door unlock. For such applications, it is highly
recommended to use a separate relay unit for a lock control such as Suprema's Secure I/O 2, DM-20 or CoreStation installed at a
secure side of a door.
Fail Secure Lock
In order to use the Fail Secure Lock, connect N/O relay as shown in the figure below There is normally no current flowing through
the relay for the Fail Secure Lock. When the current flow is activated by the relay, the door will open. If the power supply to the
product is cut off due to a power failure or an external factor, the door will lock.
NOTE
• Install a diode at both sides of the door lock wire as shown in the figure to protect the relay from the reverse current, which occurs
when the door lock operates.
• Take caution of the installation direction of the diode. Install the diode close to the door lock.
• Use a separate power supply for BioEntry W2 and the door lock.
• Suprema’s standalone intelligent readers contain internal relays that can directly lock/unlock doors without external controllers for
added convenience. For access control applications in need of security, however, it is NOT recommended to use the internal relay of
a reader to prevent any tampering attacks which can potentially trigger the door unlock. For such applications, it is highly
recommended to use a separate relay unit for a lock control such as Suprema's Secure I/O 2, DM-20 or CoreStation installed at a
secure side of a door.
BioEntry W2
Deadbolt /
Door strike
DC
power
2
1
1 - R LY NO Gray (White stripe)
2 - R LY COM Green (White stripe)
BioEntry W2
2 - R LY COM Green (White stripe)
3 - R LY NC Orange (White stripe)
Deadbolt /
Door strike
DC
power
2
3