Analog Outputs - Distech Controls IO-R-16 Wiring Manual

Nrio16Module (Software) Representation
Note that the two common DO terminals (1C2, 3C4) are isolated from each other. This is useful if controlled loads
are powered from different circuits.
An LED status indicator for each relay (D1—D4) is located on the board
through the cover. Under normal operation, each digital status LED indicates activity as follows:
• Off—relay open / no current flows.
On—relay closed / load current flows.
•
Therefore, an On status indicates that the load is powered.

Analog Outputs

Analog outputs (AO) are referenced by the terminals labeled AOn and 0V (ground). Each AO can supply a maximum
of 4 mA over the entire 0 to 10Vdc range. For this 0–10V full range, the minimum input impedance of a device
controlled by the AO must be greater than 2500 ohms.
If the device's input impedance is less than 2500 ohms, the 4 mA "max. current" limits the voltage output range. For
example, if a device with a 1000 ohm input impedance, the AO would work as a 0–4Vdc analog output.
Figure 13 shows typical wiring for an AO. For each AO, use a VoltageOutputWritable in the station database.
Figure 13 Analog output wiring diagram.
0—10Vdc device
Input impedance
is greater than
2500 ohms
Common (–)
Input (+)
Nrio16Module (Software) Representation
In the EC-Net station interface to the EC-BOS and IO-R-16 module, the module's I/O is modeled in the station's
NrioNetwork (copied from the nrio palette), under a child Nrio16Module "device level" component. This
Nrio16Module has a default name of "io16_n".
After a remote I/O module is discovered and added to the station under this NrioNetwork (each one as an
Note
Nrio16Module), the serial status LEDs for the EC-BOS's RS-485 port continually flash, reflecting polling
activity. At this time, the "STATUS" LED on that IO-R-16 module lights solid green.
When an IO-R-16 module's status LED is blinking, that is an indication that the unit is NOT Online.
Each input or output used requires a Remote Input/Output (Nrio) point to be added in the station database. These
components act as the station interface to the physical I/O points. The Nrio points you need for each input or output
type are noted in previous wiring sections in boldface. For Nrio software details, see the Nrio Driver Guide.
16
Shielded, Twisted Cable,
61m (200 ft) maximum
AO1 0V AO2 AO3 0V AO4
August 2, 2017
Nrio16Module (Software) Representation
(Figure 3 on page 8), and also visible
Use point: VoltageOutputWritable
Remote IO-R-16 Module Mounting and Wiring Guide