
Eiki A-2
IR relay box
Instruction Manual
Package contents
Item Qty.
A-2 IR relay box 1
Screw terminal plugs for relay connection 4
Screw terminal plug for control connection 1
DC In plug 1
Manual 1

To the System IntegratorR
Thank you for choosing Eiki A-2.
The A-2 IR Relay Box is part of the Eiki
control system family of products. It
is a simple, easy to set up and operate
IR or RS232 controllable 4 relay module
that allows for remote control operation
of many devices – projection screens,
lights, monitors etc or speaker
switching.
Before commencing installation, please
read these instructions carefully to get the
best results from your A-2.
Do not exceed maximum ratings.
For your safety
Please ensure that any wiring used to connect
A-2 to other equipment is kept clear of mains
wiring and follows applicable local wiring
codes. Mains wiring must only be carried
out by a qualified electrician.
Maximum switched load per relay
Resistive - 250 V, 10A
Motor - 250 V, 1/2 HP
Tungsten - 250 V, 1A
Make sure that the 12 volt power supply
you are using meets your local safety
regulations and that its voltage does not
exceed 16 volts DC. Unregulated power
supplies can output voltages that are well
above what is shown on their label.
NOTE: This symbol and recycle system apply to EU
countries only and do not apply to countries in othe
areas of the world.
Please dispose of this equipment at your local
community waste collection/recycling centre. In the
European Union there are separate collection systems
for used electrical and electronic
roducts.
Your EIKI product is designed
and manufactured with high
quality materials and
components which can be
recycled and reused.
This symbol means that
electrical and electronic
equipment, at their end-of-life,
should be disposed o
separately from your household
Federal Communication Commission Notice
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
– Consult the dealer or an experienced radio/TV technician for help.
Do not make any changes or modifications to the equipment unless otherwise specified in the instructions. If such
changes or modifications should be made, you could be required to stop operation of the equipment.
Model Number : A-2
Trade Name : EIKI
Responsible party : EIKI International, Inc.
ddress : 30251 Esperanza Rancho Santa Margarita CA 92688-2132
Telephone No. : 800-242-3454 (949-457-0200)
EIKI A-2
Tested To Comply
With FCC Standards
FOR HOME OR OFFICE USE
U
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®
V:E1.05

Eiki A-2 manual Page 3
IR relay box
Overview.
The A-2 IR relay box is a DIN-rail mountable
module that contains 4 SPDT (single-pole doublethrow) relays, each rated to switch a maximum of
10 Amps at 250 Volts.
The A-2 operates from 12 Volts DC. The power
supply you use must comply with local electrical
safety regulations and be capable of supplying up
to 200mA. It is permissible for this power supply to
be shared with other equipment in your system.
Four pre-defined operations are available for each
relay – On, Off, Momentary and Toggle.
An A-2 relay box may be assigned an address from
0 to 15 to allow multiple units to be connected to
the same control bus and controlled independently.
FIG.1. Module view
IR-BusRS232
R4R3
N/C
N/C
N/O
N/O
C
C
Gnd
RX
TX
DATA
+V
Gnd
N/C
N/C
N/O
N/O
C
C
12V DC
200mA
R2 R1
+
Address
A-2
IR Relay Box
Eiki Industrial Co., Ltd
Made in Australia
SN
R4
R3
R2
R1
POWER
1
2
4
8
U
L
®
Maximum Relay load
ratings (each rel ay)
250v 10A resistive
250v 1A incandescent
250v 0.5 hp motor
Relay
connections
IRBus connection – IR receiver or
control panel connects here.
RS232
connection
Unit Address
dipswitch
Indicator LEDs
Relay
connections
DC