Honeywell International Inc. IM11PRT Manuale Utente

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IM11 RFID Reader Module Integration Guide (Confidential)
25
Input and Output Voltage Level Descriptions
Auxiliary outputs are 3-state inputs (high impedance) on power-up 
until they are written to for the first time. You should provide pullups 
or pulldowns to keep any external logic disabled during this 
condition. 
Voltage Levels
Low
High
Notes
Inputs
0 to 0.8 V
2.4 to 5.5 V
± 10 μA max input current
Outputs 0.4 V max @ 4 mA 2.9 V min @ -4 mA