BloodTrack Kiosk® V5 Installation Guide
HAE: SM-BloodTrack-08(AA)
SBC100xxx
GBE: 2000-JNB0012
49
Number
Function
Connection
6
0V
To magnet
Chassis
Signal shield
To conductive P-clip
The 12V supply is linked to the relay common (RC), which then powers the
magnetic lock when the relay is engaged, as this connects RC to the normally open
(NO) connection. Power then goes through the magnet to 0V completing the circuit
and energizing the coil of the electromagnet lock.
8.3.7 Fitting Diode to Powered Magnetic Lock
CAUTIONS
•
The diode/TVS component must be insulated with suitable sleeving so no
parts are exposed.
•
Care should be taken so that the component legs of the diode cannot short
to any part of the BloodTrack Kiosk V5 metalwork, or any other connections.
•
A check should be done to ensure the diode is firmly connected.
•
Do not touch any accessible part and a patient at the same time.
It is recommended that a 1N400x series diode (for example, 1N4006) or a TVS
component is used in ‘reversed’ protective configuration. Diodes are polarized
components with an anode and a cathode. The cathode is denoted by a band on the
actual component. As the diode is ‘reversed’ in order to dissipate energy in the
magnet when it is released, the cathode, denoted by the band, is connected to the
positive side of the circuit. The anode is connected to 0V.
Figure 20
Fitting diode to powered magnetic lock
Therefore, the diode should be connected across the magnet connections so that
the diode’s cathode is on the positive side of the magnet. With the normal magnetic
lock connection this will mean the cathode
—banded—is connected to pin 4 and the
anode to pin 6, 0V.
8.3.8 Releasing Door Lock for Emergency Access
Note:
The emergency access switch will only release storage locations connected via
the BloodTrack Kiosk V5 relay outputs. The emergency access switch
will not
release storage locations connected via serial ports.
