Rabbit BL2600, User Manual

Page: 25 / 116

User’s Manual 19
3.2 Digital I/O
3.2.1 Digital Inputs
The BL2600 has 16 digital inputs, DIN16–DIN31, each of which is protected over a range
of –36 V to +36 V. The inputs are factory-configured to be pulled up to +5 V, but they can
also be pulled up to +K or DCIN, or pulled down to 0 V in banks by changing a jumper as
shown in Figure 7.
CAUTION: Do not simultaneously jumper more than one setting on a particular
jumper header (JP3, JP4, and JP5) when configuring a bank of digital inputs.
Figure 7. BL2600 Digital Inputs DIN16–DIN31 [Pulled Up—Factory Default]
Table 4 lists the banks of digital inputs and summarizes the jumper settings.
When you use the software
digIn
function call to read the digital inputs, DIN16–DIN31
are considered to be digital input channels 16–31.
Table 4. Banks of BL2600 Digital Inputs
Digital Inputs Header Pins Jumpered Pulled Up/Pulled Down
DIN16–DIN19 JP3 1–2 Inputs pulled up to +5 V
DIN20–DIN23 JP4 3–4 Inputs pulled up to DCIN
DIN24–DIN31 JP5 5–6 Inputs pulled up to +K
7–8 Inputs pulled down to GND
27 k W
+K
DCIN
+5 V
Rabbit® 3000
Microprocessor
+3.3 V
DIN16–DIN31
DIN20–DIN23 27 k W
100 k W
DIN16–DIN19
DIN24–DIN31