Measurement Computing miniLAB-1008 - Manual (Page 15)

miniLAB 1008 User's Guide Functional Details
Digital I/O connector and pin out
Digital I/O connections are made to the DB37 connector on the top edge of the miniLAB 1008. This connector
provides connections for 24 digital lines (
Port A0 to Port C7 ), six ground connections ( GND ), and two power
output terminals ( USB +5V Out ). Refer to and Table 3-2 for the DB37 connector pin out. Figure 3-2
Figure 3-2. DB37 Digital I/O connector
Digital I/O connections (Port A0 through Port C7)
The 24 digital I/O pins ( Port A0-A7 , Port B0-B7 and Port C0-C7 ) are TTL-level compatible. Each pin has a
47 kilohm (kΩ) pull-up resistor and is configured as an input by default. If needed, the miniLAB 1008 can be
factory configured to provide pull-down resistors.
Caution! Port A0 through Port C7 have no overvoltage/short circuit protection. Do not exceed the voltage
limits or you may damage the pin or the miniLAB 1008. To protect these pins, you should use a
series resistor.
19
37
1
20
Table 3-2. DB37 connector pin out
Pin Signal Name Pin Signal Name
1 n/c 20 USB +5V Out
2 n/c 21 GND
3 Port B7 22 Port C7
4 Port B6 23 Port C6
5 Port B5 24 Port C5
6 Port B4 25 Port C4
7 Port B3 26 Port C3
8 Port B2 27 Port C2
9 Port B1 28 Port C1
10 Port B0 29 Port C0
11 GND 30 Port A7
12 n/c 31 Port A6
13 GND 32 Port A5
14 n/c 33 Port A4
15 GND 34 Port A3
16 n/c 35 Port A2
17 GND 36 Port A1
18 USB +5V Out 37 Port A0
19 GND
Refer to the " Digital connector cabling " section for descriptions of cables that are compatible with the DB37
digital I/O connector.
Caution! The
USB +5V Out pins on the DB37 connector are outputs. Do not connect an external 5 V supply
or you may damage the miniLAB 1008 and possibly the computer.
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