Cisco Catalyst IR1800 Rugged Series Hardware Installation Manual page 82

The Digital I/O Connector
Figure 29: Digital I/O Connector
Note The default state of the Digital I/O is input, the open-collector is open (off).
The power connector pinouts are as follows:
• Top Row: Pins 6, 5, 4
• Bottom Row: Pins 3, 2, 1
The pinouts for the Digital I/O are described in the following table.
Table 25: Digital I/O Pinouts
Pin Name Direction
#
1 DIGI_IO_1 I/O
2 GND —
3 DIGI_IO_3 I/O
4 DIGI_IO_2 I/O
5 Ignition In
6 DIGI_IO_4 I/O
Vehicle Connections
When connecting to automotive power, it is expected that the ignition output will be +12 VDC, or +24 VDC
(following the battery voltage). Connect the ignition input of the router to the ignition output of the automobile.
The DC In + and DC In - leads can be directly connected to the battery. However, we recommend that you
connect them after a fuse.
Important
For vehicle installations, it is required to connect the ignition input, and use the Ignition Power Management
feature of the router. This eliminates unnecessary power cycling of the router whenever the vehicle is turned
off and then turned back on.
Cisco Catalyst IR1800 Rugged Series Router Hardware Installation Guide
74
Description
Digital IO Port 3
Ground
Digital IO Port 2
Digital IO Port 4
Ignition input (6V - 36V)
Digital IO Port 1
Digital I/O, Ignition, and CAN Bus Connectivity