Weidmuller GPRS Alarm Unit - Manual (Page 15)

Description of Functions
3-13
• Low purchasing costs and cost-effective operation thanks to special
M2M-GPRS tariffs.
3.2 Functions of the interfaces
3.2.1 Digital inputs
Binary inputs for detection of external states as a high or low signal
• Electrically isolated and floating in two groups:
• Number: 8
• Input voltage: 0 … 30 VDC
• Input voltage status 0: 0 … 4 V / 0 … 1.2 mA
• Input voltage status 1: 10 … 30 V / 1.5 … 4.5 mA
• Debouncing can be parameterised
• Each input can be assigned event-related texts with system text
blocks.
Equivalent circuit diagram for the digital inputs:
Each input can be assigned event-related texts with system text blocks,
see Section 4.6 Alarm Message.