CSI CARDPIN1, Installation Manual

Page: 16 / 60

CSI Key/Card Readers Installation Guide
10 CSI Readers
on lug on the wire end to be connected to the key/card reader grounding screw.
Connect the other end of the wire to the metal object by the method best suited to
ensure a solid ground connection.
2. If no suitable metal object is available for grounding, consult CSI for further
key/card reader grounding information.
Note: If you are not able to ground the reader as shown in Figure 9 , you can configure the DPU
(except for DPU-7920 series controllers) to provide the necessary ground by placing the
jumper labeled J12 across posts A and B. This places chassis ground at terminal 2 of the
RJ45 connection and at terminal 2 of an attached breakout box. You may then connect the
key/card reader ground to terminal 2.
The DPU-7920 series controllers cannot be configured to provide the chassis ground for the
key/card reader. These controllers use terminal 2 as an auxiliary input.
Power/Data Line Connection
Connect the key/card reader to the DPU or entry controller by connecting the RJ45 male
plug on one end of the cable to the RJ45 female connector at the rear of the key/card
reader. Then route the other end of the cable to the RJ45 female connector at the DPU
or entry controller (the DPU-7920 series controllers do not provide an RJ45 connection
Figure 9. Key/Card Reader Grounding
Grounded
Electrical Box
To Key/Card
Reader
Grounding
Screw
Cold Water
Pipe
OR
10 AWG
(5.27 mm
(or larger)
Crimp-on
Spade Lug
Key/Card
Reader
Grounding
Screw
2
) Wire