Micromod MOD: Modcell 2050R Users Guide Manual de usuario Pagina 26

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IB-23C650
INSTALLATION
Figure 9. Digital Input Connections
1.2K
To Micro-
processor
4.5K
Same as
#31
Note: External device
sinks current.
CONTROLLER
+5V
DIGITAL INPUT
Digital Input 2
Digital Input 1
NOTE: Circuit common is disconnected from terminal #29 on instruments
built for EU EMC compliance (electrical code 12). The common
return for these instruments must be connected to one of the other
common terminals, #2 or #9.
Digital input specifications are:
Input Type: Dry contact or dc voltage inputs
Open: 50K ohms minimum or 4-24V dc
Closed: 50 ohms maximum or <1.5V dc
Sample Time: 0.25 Seconds
Contact Source: 3.7 mA @ 0 Volts, Typical
20
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