Cisco IR1101 Hardware Installation Manual page 22

Digital I/O Connector
Pin #
5
Digital Input and Output Specifications are described in
Table 3 is considered "dry contact", and Table 4 is considered "wet contact".
Table 3: Digital Input Specification
Specification Minimum
Input Voltage High 2.2
Input Voltage Low -
Input Current -
Note1: Current is flowing out of the terminal although it is an input, i.e. sourcing. The current is flowing in
the terminal for the output, i.e. sinking.
Table 4: Digital Output Specification
Specification Minimum
Output Voltage High 2.5
Output Voltage Low -
Internal Pull-up 3.3K – 1%
Resistance
Internal Pull-up Voltage -
External Pull-up Voltage 3.3
Sink Current
Common features of the Digital I/O are:
• Withstands up to 60V applied at the terminal.
• Reverse voltage protected and causes no damage to the equipment.
• Digital input and output can coexist on different channel.
• LED Indicator: provision-able, On: Active, Off: Non-active.
• Electrical isolation: 2000 VDC.
• 4kV Surge protected (IEC 61000-4-5).
IR1101 Industrial Integrated Services Router Hardware Installation Guide
16
Name
Return
Maximum Unit
60 Volts
1.2 Volts
0.68mA uA
Note1
Maximum
0.4
3.3K – 1%
3
60
200
Direction
Return
Table 3 and Table 4
Unit
Volts
Volts
Ohms
Volts
Volts
mA
Product Overview
Description
Digital IO Common Return
.
Notes
No external voltage
applied.
No external voltage
applied.
External resistance
required to limit current
to 200mA.