SZ-IO
Stanza®
Wireless Control Interfaces
369379 Rev. A 1 12.10.10
SZ-IO Contact Closure Interface
Description
The Stanza system is an easy-to-install and easy-to-use
lighting control system designed especially for hotel guest
rooms and similar applications. The system consists of
wallbox dimmers, wallbox switches, line-voltage wallbox
keypads, low-voltage interfaces, and lamp socket
dimmer/switches. All of these devices communicate via
radio frequency (RF) within each individual guest room.
The Stanza contact closure interface allows Stanza
systems to connect with equipment that has contactclosure inputs and outputs, including:
– Occupancy and vacancy sensors.
– Motorized window treatments.
– AV equipment.
– Thermostats.
– Card switches.
– Alarm systems.
The functionality of the Stanza contact closure interface
is determined by programming from the Stanza design
graphical user interface (GUI) PC software.
Features
•Provides five inputs and five dry contact closure outputs.
•Provides both normally open (NO) and normally closed
(NC) momentary or maintained contacts.
•Using the inputs, contact closures in other
equipment can interface with the Stanza system to:
– Select scenes.
– Turn lights on or off based on room occupancy.
– Generate contact closure outputs.
•Using the outputs, contact closure inputs or button
presses on keypads can:
– Trigger outputs to control other equipment.
– Provide status feedback to other equipment.
•Provides 15 - 24 V , 100 mA maximum output for
powering external devices, such as card switches and
occupant sensors.
•Up to 3 contact closure interfaces may be used in a basic Stanza system (limit can be increased with SZ-CI-PRG
present).
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Page 1
Wireless Control Interfaces
SZ-IO
Stanza®
369379 Rev. A 2 12.10.10
Specifications
Standards:
Five Output Terminals:
•FCC approved. Complies with the limits for a Class B •Provide maintained or momentary (programmable
digital device, pursuant to Part 15 of the FCC rules
0.25- to 20-second) outputs.
•The SZ-IO is not rated to control unclamped,
Input Power:
inductive loads. Inductive loads include, but are not
•Low-voltage PELV (Class 2: USA).
limited to, relays, solenoids, and motors. To control
Operating voltage: 15 - 24 V , 200 mA.
these types of equipment, a flyback diode must be
•AC adapter included (requires 120 V outlet;
used (DC voltages only). See diagram below.
provides 15 V output).
Output Power:
•The SZ-IO can support an external device drawing
up to 100 mA. Note that the power is supplied
directly from the external low-voltage PELV
(Class 2: USA).
Five Input Terminals:
Flyback
Diode
Inductive
Load
NO
+
-
NC
DC
SZ-IO Output
•Accept maintained inputs and momentary inputs
with 40 msec minimum pulse times.
•Off-state leakage current must be less than 100 µA.
•Open circuit voltage: 24 V maximum.
•Relays are non-latching and de-energize if power is
•Inputs must be dry contact closure, solid state,
lost.
open collector, or active-low (NPN)/active high
•250 ft (76 m) maximum from interface to external
(PNP) output.
device.
- Open collector NPN or active-low on-state
•Output current is rated as follows:
voltage must be less than 2 V and sink
3.0 mA.
Resistive
Supply
Load
Voltage
- Open collector PNP or active-high on-state
voltage must be greater than 12 V and
1.0 A
0 - 24 V
source 3.0 mA.
•250 ft (76 m) maximum from external device to
0.5 A
0 - 24 V
interface
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Page 2
SZ-IO
Stanza®
Wireless Control Interfaces
369379 Rev. A 3 12.10.10
Specifications
Key Design Features:
•Five Status LEDs can be set to light when
associated output or input is active (on) or closed.
Additional status LEDs show proper device and
system operation.
•Power failure memory: if power is interrupted, when
the power is restored, device will retain all settings
that were in place prior to the interruption.
•Diagnostic mode allows the outputs to be
overridden temporarily.
System Communications and Capacity:
•Contact closure interface communicates with
other Stanza system components through radio
frequency (RF) at 434 MHz.
•Multiple RF channels and thousands of system
addresses prevent interference between systems.
•Each contact closure interface counts as
1 device toward the basic system maximum of
31 RF devices (maximum devices can be increased to
100 if an SZ-CI-PRG is present in the system).
•A maximum of three Stanza contact closures may
be used per system (limit increases with SZ-CI-PRG
present).
Environment:
•32-104 °F (0-40 °C).
•Relative humidity less than 90% non-condensing.
•Indoor use only.
•Cannot be mounted in a metal enclosure (interferes
with RF reception).
Warranty:
•1-year limited warranty
•2-year full parts and labor warranty, with 8-year
pro-rated parts replacement on commissioned
systems
For complete warranty details, see
www.lutron.com/TechnicalDocumentLibrary/
Warranty_CommercialSystems.pdf
Color/Finish:
•Black only
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Page 3
SZ-IO
Stanza®
Wireless Control Interfaces
369379 Rev. A 4 12.10.10
Dimensions
Dimensions are in inches (mm).
2.47
(62.7)
Mounting
holes
6.0
(152.4)
4.26
(108.2)
3.75
(95.3)
0.25
(6.4)
0.18 (4.6)
dia.
0.34 (8.6)
dia.
1.0 (25.4)
5.26
(133.6)
Terminal
blocks
on this side
LEDs
and DIP
switches on
this side
#6 or #8 (M3 or M4)
screw recommended
(not included)
0.18 (4.6)
dia.
1.06
(26.9)
Mounting Diagram
Mounting
1.Mount the control interface directly on a wall, as shown in
the Mounting Diagram, using screws (not included).
2.When mounting, provide sufficient space for the antenna
and connecting cables.
3.Mount in an accessible location for convenient access
to addressing button, LEDs, terminal blocks, and DIP
switches.
4.The unit cannot be mounted in a full metal enclosure. If
mounting in a metal enclosure is necessary, antenna must
fully protrude out of a knockout or other hole. The antenna
is not removable or remotely mountable.
5.Connect wiring as shown in the Wiring Diagram. Use wire
sizes as specified in the Wiring Diagram.
6.The SZ-IO should be mounted no less than 3 ft (1 m) from
motorized window treatments for proper RF performance.
7.The SZ-IO must remain accessible after commissioning.
8.The SZ-IO must be connected to Earth/Ground or Chassis
Ground for ESD protection (see Wiring Diagram).
Wall
2.50
3.75
Control Interface
Wire Strip Length
4.26
5.26
3/8 in
(10 mm)
1.06
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Page 4
Wireless Control Interfaces
SZ-IO
Stanza®
369379 Rev. A 5 12.10.10
System Overview
System Communication Notes
Keypad
Dimmer
30 ft (9 m)
max.
30 ft (9 m) max.
from repeater
device
Feature
Maximum devices
RS232 and/or Ethernet
Interface Capability
PC Required for Device
Replacement
30 ft (9 m) max.
from repeater
device
•Stanza RF devices must be located within 30 ft
(9 m) of a Stanza RF device configured as a repeater.
Multiple devices configured as repeaters may be
necessary to provide adequate coverage.
•Any Stanza RF device can be configured as a
repeater.
•A total of 5 devices maximum can be configured as
repeaters.
•Devices configured as repeaters must be within 30 ft
(9 m) of another device configured as a repeater.
•Stanza lighting controls cannot be controlled
wirelessly, and Stanza keypads and contact closure
interfaces will not function, until they are addressed
and programmed.
Basic System
(no SZ-CI-PRG present)
31
No
Advanced System
(with SZ-CI-PRG present)
100
Yes
No
Yes
Interface Overview
Antenna
SZ-IO
Addressing button
LED
LED
LED
LED
LED
LED
LED
1234567
PELV (Class 2: USA) Power In
15 - 24 V
200 mA
1: CCI/O 1 status
2: CCI/O 2 status
3: CCI/O 3 status
4: CCI/O 4 status
5: CCI/O 5 status
6: Addressing mode
7: RF link activity
DIP Switches
Note: Device should be powered using the supplied
transformer or shade power supply (Lutron® part number
SZ-PS-P1-1-50). See Wiring Diagram. Contact Lutron
Technical Support prior to powering device using any other
transformer or power supply.
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Page 5
Wireless Control Interfaces
SZ-IO
Stanza®
369379 Rev. A 6 12.10.10
Wiring Diagram
Contact Closure Inputs
CCO 1 NC
CCO 1 NO
1-2 COM
CCO 2 NC
CCO 2 NO
CCO 3 NC
CCO 3 NO
3-4 COM
CCO 4 NC
CCO 4 NO
CCO 5 NC
CCO 5 NO
5 COM
CCI 1
CCI 2
CCI 3
CCI 4
CCI 5
COM
+PWR OUT
COM
GND
N/C
Contact Closure Outputs
15 - 24 V
200 mA
Power terminals each hold
two 18 AWG (1.0 mm2)
wires
CCI and CCO terminals each hold one
28 - 16 AWG (0.08 - 1.5 mm2) wire
Note: For ESD protection, the included ground
wire should be connected to Earth/Ground before
device is powered.
Operation
The SZ-IO receives its operating settings during
system startup. A device database containing
settings is transferred to the SZ-IO after it has been
addressed. This database includes settings for:
• CCO behavior (maintained vs. momentary)
• Momentary pulse time
• CCI programming action
• System presets
LED Feedback
The SZ-IO provides 7 LEDs for user feedback:
Status LEDs
LEDs 1 through 5 provide feedback for the CCOs
and CCIs. The display mode (CCO vs. CCI status)
depends on the position of DIP switch 7: The LED
lights when the CCO is active or when the CCI is
closed.
Switch up (on): CCI status displayed
Switch down (off): CCO status displayed
Addressing Mode LED
LED 6 will blink during addressing. A slow blink
(on for 3 seconds every 4 seconds) indicates an
unaddressed device. A fast blink (once per second)
indicates an addressed device. When not in
addressing mode, this LED is off.
RF Link Activity LED
LED 7 will blink when the SZ-IO receives or
transmits an RF packet.
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Diagnostic Mode and DIP Switch Settings
Diagnostic mode allows the user to override the contact
closure outputs (CCOs) of the device.
DIP Switch Settings
Switch #
6 7
Mode
LED Display
Shows
Normal
Outputs
Normal
Inputs
Diagnostic
Outputs
Switch up (On)
Switch down (Off)
Note: In diagnostic mode, DIPs 1-5 set the override state of the outputs.
Diagnostic Mode Operation
1. Enter diagnostic mode. Move DIP switch 6 to the on (up)
position. LEDs 6 and 7 will flash together (once per second)
while the unit is in diagnostic mode.
2. Select CCOs to override. Use DIP switches 1 through 5 to
select which CCOs to close when the addressing (ADDR)
button is pressed. (The DIP switch number corresponds to
the CCO it controls.)
3. Activate the CCOs. Press the addressing button to activate
the CCOs you set using the DIP switches in the previous step.
The CCOs will remain active as long as the button is pressed.
4. Exit diagnostic mode. Move DIP switch 6 to the off (down)
position. LEDs 6 and 7 will stop flashing together.
Page 6
Wireless Control Interfaces
SZ-IO
Stanza®
369379 Rev. A 7 12.10.10
Wiring Examples
}
Stanza card switch
(rear view)
Common
+PWR
COM
GND
N/C
Wiring to Stanza® Card Switch
Available CCIs
(any available CCI can be used)
SZ-IO
Rear View
4: CCI Common
3: CCI
1: Common
2: Power
15 – 24 V
Wiring to Stanza® Contact Closure Shade
Note: Power supplied to SZ-IO
by plug-in wall transformer on
the other side of the unit.
Available CCOs
(any available CCO
can be used)
Lutron® motorized window
treatment power supply
}
GND
N/C
+PWR
COM
N/C
24 V
COM
Note: The SZ-IO should be mounted no
less than 3 ft (1 m) from motorized window
treatments for proper RF performance.
SZ-IO
Rear View
To second
EDU
(if present)
Terminal block
of shade or
drape EDU
COM
24 V
Close
Open
Lutron contact
closure drapery
track system
electronic drive
unit (EDU)
Note: When wiring to Lutron contact closure shade as
shown, power is provided to the SZ-IO by the window
treatment power supply. In this case, a separate plug-in
wall transformer should not be used for the SZ-IO.
Available CCIs
}
Common
Available CCOs
}
+PWR
COM
GND
N/C
Wiring to/from Equipment by Others
Note: Power supplied to SZ-IO
by plug-in wall transformer on
the other side of the unit (not
shown).
SZ-IO Rear View
For powering equipment
by others
15 - 24 V
100 mA
max available from plugin supply on front panel.
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From CCO equipment
by others
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