Binary Input - Distech Controls IO-R-16 Wiring Manual

Inputs
Figure 10 4 to 20 mA wiring.
4—20 mA Sensor
(self-powered sensor)
Range: 0—20 mA
+
i
Shielded, Twisted Cable,
–
61m (200 ft) maximum
When using an externally powered 4–20 mA sensor, be sure to
Caution
making or changing any wiring connections to the IO-R-16 module. This is in addition to removing power
from the IO-R-16 module.
It is important to not apply external power to the UI inputs without the 499 ohm resistor in place.
Otherwise, even a momentary application of power (say, 24Vdc) to the UI terminals without the resistor
may damage circuitry on the IO-R-16. Only after completing all input wiring should you restore power
to such external power supplies.

Binary Input

Inputs support both pulse contacts and normal dry (equipment status) contacts.
Pulse contacts may have a change-of-state (COS) frequency of up to 20 Hz with a 50% duty cycle.
•
Note: Minimum dwell time must be > 25ms. (Contacts must remain open at least 25ms and be closed at least
25ms.)
Standard dry contacts must have a 1 Hz. (or less) COS frequency, with minimum dwell time > 500ms.
•
(Contacts must remain open at least 500ms and be closed at least 500ms.)
Both types of dry contacts support 3.3 Vdc open circuits or 330 µA short-circuit current. For a pulse contact, use the
CounterInputPoint in the station database. For other dry contacts, use the BooleanInputPoint.
Figure 11 shows the wiring diagram (which is identical for both uses), but with different types of Nrio software points
used for either application.
14
U1 0V U2 U3 0V U4
Cut and tape shield
wire back at sensor.
Shield
Use point: VoltageInputPoint
Conversion: 500 Ohm Shunt
499 Ohm resistor
secondary conversion: Linear
(supplied with unit)
Stud in enclosure
Remote IO-R-16 Module Mounting and Wiring Guide
August 2, 2017
de-energize its power supply
Wiring Details
before