User`s manual

PK2200 Subsystems s 25
The digital inputs can be pulled up to +5 V or down to GND by installing
jumpers on JP2. When jumpered, the digital input line impedance is
4.7 kΩ in the range 05 V for inputs 110 and 1516. The impedance on
inputs 1114 is approximately 1.5 kΩ. Outside this range, the input
impedance is greater than 3.9 kΩ for inputs 110 and 1516. Jumper JP2
connects the inputs to pull-up or pull-down resistors. Table 3-1 lists the
JP2 jumper settings and Figure 3-2 illustrates JP2 jumper settings.
Figure 3-2. JP2 Digital Input Jumper Settings
The Figure 3-3 illustrates a typical digital input line.
Figure 3-3. Typical Digital Input
Table 3-1. JP2 Digital Input Jumper Settings
Pins Jumpered Inputs Configuration
7–9 1–4 and 9–12 Pulled up
8–10 5–8 and 13–16 Pulled up
9–11 1–4 and 9–12 Pulled down
10–12 5–8 and 13–16 Pulled down
Pull-down configuration
Pull-up configuration
12
34
56
78
910
11 1 2
JP2
12
34
56
78
910
11 1 2
JP2
Select
18 or
916
GND
0.01 µF
R
Inputs 116
4.7 kΩ
+5V
JP2
D0D7
R = 2 kΩ for inputs 11, 12, 13, and 14.
R = 22 kΩ otherwise
to Z18 0 if input 11,
12, 13, or 14