HID Corporation, 9292 Jeronimo Road, Irvine, CA 92618-1905, USA • Tel: (949) 598-1600, (800) 237-7769, Fax: (949) 598-1690
http://www.hidcorp.com
MaxiProx DFM Reader Installation Manual 5375-901 Rev D
Page
16 of 20
The voltage, current, and timing of the data pulses are measured at the Reader in reference to the
power supply/signal ground at the Reader. The voltage, current and timing of a signal driving an
auxiliary input device on a Reader is measured at the control panel that is controlling the input device
(with reference to the signal ground at the panel).
4.1.3 Signal Levels
The
Data One
,
Data Zero
, and LED Control conductors connect signals between the Reader and the
panel. The logic levels are defined as follows:
Table 9: Logic Levels
Voltage
Data Outputs (Data0 and Data1)
Control Inputs (LED’s, Hold, Beeper)
Levels
Minimum
Maximum
Minimum
Maximum
Voh
3.5V
5.5V
3.5V
5.5V
Vol
0.0V
0.5V
0.0V
0.5V
Ioh
0.0mA
5.0mA
-1.0mA
0.0mA
Iol
-25.0mA
0.0mA
0.0mA
25.0mA
4.1.4 Data Pulses
The
Data One
and
Data Zero
signals are normally held at a logic high level until the Reader is ready
to send a data stream. The Reader places asynchronous low pulses on the appropriate data lines to
transmit the data stream to the panel. The following timing parameters shall be observed:
Figure 3: Data Pulses - Timing Parameters
§
Tpw
Pulse Width Time - 30uS (minimum) to 50uS (maximum)
§
Tpi
Pulse Interval Time - 1.8mS (minimum) to 2.2mS (maximum)
4.1.5 Example Output
The following is an example of an ID card with the number of “
816
” decimal, which will be output by the
MaxiProx Reader, the number “
02004CA0661
” hex.
Data One
Data Zero
Tpw
Tpw
Tpw
Tpi
Tpi
Voh
Voh
Vol
Vol
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