PNI Legacy Comm Board - Manual (Page 4)

PNI Corporation 133 Aviation Blvd., Suite 101, Santa Rosa, CA 95403-1084 USA;, Fax: (707) 566-2261
For the most current specifications, please visit our website at:
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Page 4 of 42
Table 3: Characteristics
Parameter Minimum Maximum Typical
Operating Characteristics
Current – standby
(Low power mode, no module loaded)
LPM0 a 14.4 mA RMS
LPM1 b 7.0 mA RMS
LPM2 c 5.4 mA RMS
RS-232 Receiver Inputs (CTS, RxD)
Input threshold low 0.6 VDC
Input threshold high 2.0 VDC
RS-232 Transmitter Output (TxD)
Output Voltage Swing
(both transmitter outputs loaded with 3KΩ to GND)
±5 VDC ±5.4 VDC
Output resistance
(V
CC
= V+ = V- =0, output = 2 V)
300Ω 10MΩ
Output short circuit current
(Output = GND)
±60 mA ±30 mA
RS-485 Transceiver Signals (D-, D+)
Input differential threshold -200 mVDC -50 mVDC
Differential output voltage
(R = 27 Ω)
1.5 VDC
Change in magnitude of differential output voltage for
complementary output states
(R = 27Ω or 50Ω)
-0.2 VDC 0.2 VDC
Common mode output voltage
(R = 27Ω or 50 Ω)
3.0 VDC
Change in magnitude of common mode output
voltage for complementary output states
(R = 27Ω or 50 Ω)
0.2 VDC
Output sort-circuit current
(V
Y
or V
Z
= +12 V to – 7 V)
±250 mA
a. The unit is in normal operating mode with the LEDs enabled.
b. The unit is in normal operating mode with the LEDs disabled.
c. The unit is in a Sleep mode and will need to be awakened via the CTS (Wake Up) line.
CommBoard
Specifications