R
2 SZ-IO Control Interface Installation and Operation
Contact Closure Ratings
Five Input Terminals:
• Accept maintained inputs or momentary inputs with
40 msec minimum pulse times.
• Off-state leakage current must be less than 100 µA.
• Open circuit voltage: 24 V maximum.
• Inputs must be dry contact closure, solid state,
open collector, or active-low (NPN)/active high (PNP)
output.
- Open collector NPN or active-low on-state voltage
must be less than 2 V and sink 3.0 mA.
- Open collector PNP or active-high on-state voltage
must be greater than 12 V and source 3.0 mA.
• 250 ft (76 m) maximum from external device to
interface
Five Output Terminals:
• Provide maintained or momentary (programmable
0.25- to 10-second) outputs.
• The SZ-IO is not rated to control unclamped,
inductive loads. Inductive loads include, but are not
limited to, relays, solenoids, and motors. To control
these types of equipment, a flyback diode must be
used (DC voltages only). See Inductive Load Wiring
Diagram.
• Relays are non-latching and de-energize if power is
lost.
• 250 ft (76 m) maximum from interface to external
device.
• Output current on CCO terminals is rated as follows:
Low-Voltage PELV (Class 2: USA) Wiring
1 2 3 4 5 6 7
SZ-IO Front View
LED 1: CCI/O 1 status
LED 2: CCI/O 2 status
LED 3: CCI/O 3 status
LED 4: CCI/O 4 status
LED 5: CCI/O 5 status
LED 6: Addressing mode
LED 7: RF link activity
CCI and CCO terminals each hold one
28 – 16 AWG (0.08 – 1.5 mm
2
) wire
+PWR/COM
15 – 24 V
200 mA
Power terminals each
accept two 18 AWG
(1.0 mm
2
) wires
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 COM
Wiring Diagram
PELV
(Class 2: USA)
Power In
15 – 24 V
200 mA
Addressing button
DIP Switches
Antenna
Contact Closure Outputs (CCO)
Contact Closure Inputs (CCI)
+
-
DC
Inductive
Load
Flyback
Diode
SZ-IO Output
Voltage
across CCO
0 – 24 V
0 – 24 V
R
NO
NC
Max. CCO
Resistive
Load
1.0 A each
0.5 A each
SZ-IO Rear View
Inductive Load Wiring Diagram
GND
N/C
NOTE:
Device should be powered using
the supplied transformer or shade power
supply (Lutron P/N: SZ-PS-P1-1-50). See
wiring diagram. Contact tech support
prior to powering device using any other
transformer or power supply.
NOTE:
For ESD
protection, ground wire
should be connected
to Earth/Ground before
device is powered.
