Black Box LES1508A - Digital I;O Input Configuration; High Voltage Outputs; DIO SNMP Status

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For example, to set pin 1 to a low output, type:
ioc -p 1 -d 0 -v 0
To pulse one of these outputs, use a script like the following:
ioc -p 1 -d 0 -v 1
sleep 1
ioc -p 1 -d 0 -v 0
This will set the output high for 1 second, then return it to low (assuming the initial state is low).
8.4.2 Digital I/O Input Configuration
When either of the two digital I/O (DIO1 & DIO2) outlets is configured as an Input on the System: I/O
Ports, it can be used to monitor the current status of any attached sensor.
When configured as inputs (and this is the factory default), these first two ports are attached to an internal
EMD. To configure them as alarms, go to the Environmental page and edit and enable the Internal EMD.
Also the low voltage circuits in DIO1 and DIO2 should not be wired to voltages greater than 5V DC.
Alternately, these input ports can be monitored using the ioc command line utility (as detailed in the
previous section.
8.4.3 High Voltage Outputs
OUT1 and OUT2 (internally DIO3 & DIO4) outlets are wired as high voltage outputs. The way these
outputs are expected to be used is to pull a power connected line to ground (i.e. the OUT1 and OUT2
transistors are open collector).
The I/O port header includes a 12-V reference line (VIN) which can be used to detect the line state
change.
For example, to light a 12-V LED using the high voltage outputs, connect the positive leg of the LED to
the 12-V reference, and the negative leg to output pin 4. Due to the way that the I/O port is connected
internally, the output has to be set "high" to pull the output to ground.
The following command will switch on the led:
ioc -p 4 -d 0 -v 1
OUT1 and OUT2 transistors can operate with a supply of >5V to <= 30V @100mA. This means to drive a
relay circuit you must guarantee it doesn't provide more than 100mA when set to 1.
8.4.4 DIO SNMP status
There is a SNMP status table (with V3.9 and later) that reports on the status of the digital IO ports. The
table OID is OG-STATUSv2-MIB::ogEmdDioTable. Performing an snmpwalk on this table on a console
server with DIO produces something like (will vary depending on device status):
$ snmpwalk -v2c -c public -M $MIBSDIR -m ALL t5:161 1.3.6.1.4.1.25049.16.5
OG-STATUS-MIB::ogDioStatusName.1 = STRING: DIO 1
OG-STATUS-MIB::ogDioStatusName.2 = STRING: DIO 2
OG-STATUS-MIB::ogDioStatusName.3 = STRING: DIO 3
OG-STATUS-MIB::ogDioStatusName.4 = STRING: DIO 4
OG-STATUS-MIB::ogDioStatusType.1 = INTEGER: ttlInputOutput(0)
OG-STATUS-MIB::ogDioStatusType.2 = INTEGER: ttlInputOutput(0)
OG-STATUS-MIB::ogDioStatusType.3 = INTEGER: highVoltageOutput(1)