When a logic high signal is placed on <o1> through <o8>, the output pin is shorted
to ground (switch S1-B in the reference diagram is closed). When a logic low signal
is placed on <o1> through <o8>, the output pin is driven to +5V (switch S1-B in the
reference diagram is open). This default behavior may be modified by placing a
logic high signal on <pullup1-dis> through <pullup8-dis>. When the pullup resistor
is disabled (switch S1-A in the reference diagram is open) and the corresponding
<o> signal is driven low, the output pin floats. When the pullup resistor is enabled
and the corresponding <o> signal is driven high, the output pin is shorted to ground.
Each signal <o1> through <o8> has a corresponding feedback <o1-f> through <o8f> that is driven by the CEN-IO. Feedback is provided from the CEN-IO for these
values since another non-Cresnet device on the network may talk directly to the
CEN-IO and modify its values.
Example: <pullup1-dis> is driven high. When <o1> is logic low, versiport 1 is
floating. When <o1> is driven high, versiport 1 is shorted to ground.
Example: <pullup1-dis> is driven low. When <o1> is logic low, verisport 1 is at
+5V. When <o1> is driven high, versiport 1 is shorted to ground.
Digital Inputs: <i1> through <i8>
The CEN-IO can detect when one of its versiports is shorted to ground or driven by
a 0 to 5 volt digital signal. When a pin is shorted to ground, the corresponding <i1>
through <i8> signal is driven to logic high in the program. The threshold for
detection is < +2.5V drives the signal in the program high. Note that for a contact
closure input, the pullup resistor should be enabled for that particular input (this is
the default behavior), else the input is floating.
Example: If versiport pin 5 is shorted to ground, <i5> is driven to a logic high level.
When pin 5 is not tied to ground, <i5> is driven to a logic high level (as long as the
pullup is left enabled, which is the default behavior).
Analog Inputs: <ain1> through <ain8> and Minimum
Change <MinChange1> through <MinChange8>
A resistive sensor (for example, a sensor that measures humidity) or a voltage source
may be tied to a vesiport. This sensor or source is represented by box "A" in the
reference diagram.
When a resistive load is tied to a versiport, the corresponding pullup resistor must be
enabled (default behavior). This creates a voltage divider and provides a varying
voltage level (based on the current resistance of the sensor) for the CEN-IO to read.
For example, if a resistive humidity sensor is tied to versiport 1, then <pullup1-dis>
should be driven low. The corresponding level is read as an analog value on <ain1>
and ranges from 0 to 65535.
When a voltage source is tied to a versiport, the corresponding pullup resistor should
be disabled. This allows the A/D convertor in the CEN-IO to directly read the
voltage source's value. For example, if a voltage source is tied to vesiport 1 then
<pullup1-dis> should be driven high. The corresponding level is read as an analog
value on <ain1> and ranges from 0 to 65535 (0 to +10V on the input pin).
The CEN-IO reports any change back to the program when an analog value changes.
Depending on the input source, this can result in excessive traffic over the network.
A minimum change value may be specified on a per-input basis. This tells the CENIO to wait until the corresponding analog input changes by the minimum value
before reporting into the program. This is useful if an input source is not clean and
has jitter.
Most ports are provided on the back of the CEN-IO. Each has a silk-screened label.
Refer to the illustration and descriptions below. There is only one port on the front
panel of the CEN-IO.
CEN-IO Ports (Rear Panel)
INPUT/OUTPUT
RELAY OUTPUT
12 VDC .5A
This DC power socket connector is used to supply external power via the supplied
500 mA power pack (1000 mA power pack for CENI-IO configuration).
PC
This 6-pin, 6-position RJ11 modular jack is used to load the IP address and run
diagnostics. Refer to the pinout table below.
This LED illuminates when an Ethernet protocol error is detected.
RELAY (1 - 8)
These LEDs illuminate when respective relay is closed.
I/O (1 - 8)
These LEDs illuminate when the input or output voltage threshold for respective
INPUT ports are exceeded.
Leading Specifications
The table below provides a summary of leading specifications for the CEN-IO.
Dimensions and weight are rounded to the nearest hundredth unit.
Leading Specifications of the CEN-IO
SPECIFICATIONDETAILS
Power Requirements12V DC
Relay Closure Rating24V AC/DC, 1A
Input Threshold (per channel)2.5V DC
Input Analog Voltage Range (per channel)0 to +10V DC
Input Digital Voltage Range (per channel)0 to +24V DC (compatible with
TTL & CMOS digital signals)
Switch Current (per channel)2.5mA (contact closure to ground)
SIMPL™ Windows®
CNX Operating System
Dimensions & Weight
* The latest software versions can be obtained from the Software Downloads page
(Simplwin Library) of the Crestron website (www.crestron.com)
to register in order to obtain access to the FTP site.
Version 1.30.01 or later *
Version 5.04.11 or later
Height: 1.70 in (4.32 cm)
Width: 7.07 in (17.95 cm)
Depth: 6.32 in (16.06 cm)
TBS lbs. (TBS kg)
. New users are required
As of the date of manufacture, the unit has been tested and found to comply with
specifications for CE marking.
NOTE: This unit complies with part 15 of the FCC rules. Operation is subject to the
following two conditions: (1) these devices may not cause harmful interference, and
(2) these devices must accept any interference received, including interference that
may cause undesired operation.
Preparation for Use
Refer to the hookup diagram on the next page. Other than making the power
connection last, complete the connections in any order. The only connection not
shown in the diagram is the Ethernet/LAN connection made to the front panel of the
unit. Use a CAT 5 cable; not supplied.