Unimax MA-2025-4G, Руководство пользователя

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56
A P P E N D I X
Digital Input/Output
A digital output opens or closes the circuit between two terminals depending on the
binary state of the output. A digital input is a switch and a voltage sending device.
Depending on the switch's open/closed status, the detects a voltage or no
voltage condition, which in turn generates a logical 0 or 1, ON or OFF, alarm or normal
or similar a defined state.
H/W Specifications
PIN NUMBER DESCRIPTION
1 (VDD) 3.3V out
2 (D/I 1) Digital input (max 5VDC)
3 (D/I 2) Digital input (max 5VDC)
4 (D/O 1) Digital output (max 3.3VDC)
5 (D/O 2) Digital output (max 3.3VDC)
6 (GND) GND
[Table 28: Digital I/O PIN Number]
Electrical Specifications
Digital Outputs: Minimum 2.4 V Typical 3.3 V 16
㎃
Digital Inputs: From 0 to 5.0 V ±5
㎂
Diagram
[Figure 48: Output Circuit]
Please note that the external control circuit should support “Open Collector” outputs.