Installation Guide
CSI Key/Card Readers
CSI Readers
11
and will therefore require a breakout box). All operating power and data is routed
through this single cable. Signal pinouts for the CSI key/card readers are shown in
.
Caution:
When connecting the key/card reader to a DPU-7920 series controller, do
not
connect the
Chassis GND signal on pin 2 of the reader to the DPU (the DPU uses terminal 2 on TB3
and TB4 as an Auxiliary input). Instead, connect the Chassis GND signal from the reader
to a good earth ground.
Low Temperature Package
If the key/card reader will be exposed to temperatures below 30˚F (–1˚C) for an extended
period of time, the key/card reader low temperature package should be installed to
prevent frost from accumulating on the key/card slot. Either a Key Reader Low Temper-
ature Package or a Card Reader Low Temperature Package can be ordered from CSI.
Note:
For U.L. listed key/card readers, the low temperature package is standard.
The following paragraphs provide installation instructions and a description of the low
temperature package.
Operation
The key/card reader low temperature package heating element is a self-regulating ther-
mistor that activates to heat at low ambient temperatures and deactivates at normal or
high ambient temperatures. Nominal resistances of the heating element are 25 ohms at
–35˚F (–37
°
C) and 1500 ohms at 122˚F (50
°
C). Thus, the package may remain in oper-
ation year round. However, it is recommended that the power supply (customer
furnished) be turned off during the warm season to extend the life of the power supply.
The operating voltage required for the heating element is 5–20 VDC. The lower the
voltage, the less heat produced, and the higher the voltage, the more heat produced. A
12–18 VDC power supply (customer furnished) with 2.5 ampere minimum continuous
(surge capability in excess of 3 ampere) will provide the most efficient operation and
prolong the life of the heating element.
Caution:
Never connect the heater kit to the +5 VDC or +12 VDC supply from the DPU.
Note:
For U.L. listed applications, do not connect the heater elements to the external power supply
of the DPU. Additionally, the power supply for the heater elements must have a back-up
battery providing eight hours of operation for U.L. listed applications.
The heating element will activate at approximately 50˚F (10
°
C), and will produce
increasingly more heat as the ambient temperature drops to maintain the key/card
reader at a constant temperature of 45˚F to 50˚F (7
°
C to 10
°
C).
Table 3. CSI Key/Card Readers Signal Pinout
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Signal
+12 VDC
Chassis
GND
DATA
NC
CLOCK
Red LED
Green
LED
Signal
GND
Summary of Contents for CARDPIN1
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