iO HVAC Controls iO-WR-XR, Quick Start Manual, Page: 2 / 6

INSTALLATION:
1. Both iO-WR-XR relay transceivers are
identical and are already factory paired.
2. Each iO-WR-XR requires continuous 12 or
24 volts AC/DC power.
3. Mount each iO-WR-XR on a non-metalic
surface in a location that allows access to
wiring of device inputs and/or outputs.
4. Do not mount transceivers inside metal
enclosures as this will greatly impede the
transmission range.
5. It is recommended that 18-gauge solid (not
stranded) thermostat wire be used. Only strip
enough insulation off wires to insert into
terminals and make sure no bare wires touch
any components on the PC board. Do not
over-tighten the mounting screws.
6. Depending on the application, not all
transceiver inputs and outputs will be used.
TERMINAL DESIGNATIONS:
● ● ● ● ● ● ● ●
ON
1 2 3 4 5 6
MODE
RECEIVE
TRANSMIT
STATUS/PROG
RUN
PROG/TEST
DELAY
CHARGE
ACTIVE
ACTIVE ACTIVE
FAULT RLY1 RLY2
RLY1 COM RLY2 COM NC COM NO NC COM NO NC COM NO
Relay Inputs
RLY1 COM RLY2 COM
Each iO-WR-XR has 2
switched relay inputs.
Example: A closure on RY1
will result in a closure on RY1
(NC/COM/NO) output of the
paired transceiver.
Relay Outputs
NC COM NO NC COM NO NC COM NO
FAULT
RLY1 RLY2
Each iO-WR-XR has 2 relay outputs plus a
fault relay designed to open if there is a loss of
communications between the transceiver pairs
after 90 seconds.
Power Input
Power Input accepts 12 to 24 Volts
AC or DC. Always follow polarity
when DC power is used. Each
transceiver requires a minimum of 1
Amp (20VA) power supply.
Battery Input
Each transceiver can be provided with
an optional battery backup. The input
is for a 12 Volt Sealed Lead Acid
(SLA) battery only. Transceivers
provide a 12 volt trickle charge.
STATUS LEDs:
● ● ● ● ● ● ● ●
ON
1 2 3 4 5 6
MODE
RECEIVE
TRANSMIT
STATUS/PROG
RUN
PROG/TEST
DELAY
CHARGE
ACTIVE
ACTIVE ACTIVE
FAULT RLY1 RLY2
RLY1 COM RLY2 COM NC COM NO NC COM NO NC COM NO
1
2
3
4
5
6
FAULT RLY1 RLY2
FAULT RLY1 RLY2
7
1. RECEIVE - Flashes GREEN momentarily
when a valid radio transmission is received.
2. TRANSMIT - Flashes RED momentarily
when the transceiver transmits as a result of a
relay input change.
3. STATUS/PROG - Flashes YELLOW patterns
indicating status of the unit: pairing, error, etc.
4. RUN - Flashes ORANGE for 1 second ON
and 1 second OFF indicating the
microprocessor is running.
5. POWER LEDs - Glow solid ORANGE when
power is present for relay, logic and power
amplifier supply.
6. CHARGING - Solid GREEN when optional
battery is charging. Momentary flashing when
battery is charged and a trickle charge is
occurring.
7. ACTIVE - Solid GREEN when relay is
energized.
SWITCHES SHOWN
IN OFF POSITION