Knoll DIR21 Installation Guide

DIR21 Digital Infrared Receiver Specifications:

Specifications

Infrared carrier frequency: 30-60kHz
Indoor reception range: 150 feet + (45 meters +)
Outdoor reception range: 35-50 feet (10-15 meters)
Nominal reception angle: 50 degrees off axis
Transmission wire maximum length: 1000’ (300m)
Wire requirements: 3 conductor, minimum 24 gauge
to 200’, 22 gauge up to 500’

20 gauge to 1000’
Power requirements: Unregulated 12VDC, 40mA
Dimensions:

1-3/4" x 4" x 1"

(45mm x 102mm x 26mm)

Requires 12VDC power supply, emitter(s) and DIR54,
DIR55 or DIR58 connection block.

Warranty

Knoll Systems warrants its products sold in the USA and Canada by authorized
Knoll dealers to be free of defects in materials and workmanship. This warranty
extends for three full years from the date of purchase by the original consumer.
Any products returned to Knoll Systems and found to be defective by Knoll
Systems within the warranty period will be repaired or replaced at Knoll Systems
option, at no charge. Knoll Systems will not be responsible for the actual cost of
installation or removal of the product, nor for any incidental or consequential
damages. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation may not apply to you. This
warranty gives you specific legal rights. You may have additional legal rights
that vary from state to state.

Knoll Systems www.knollsystems.com

145 Tyee Drive Point Roberts, WA 98281
12140 Horseshoe Way Richmond BC V7A 4V4
tel [phone], fax [phone]

Made in Canada Knoll Systems All Rights Reserved

DIR21

Digital Infrared Receiver
Installation Instructions v1.1

Warning: To be installed and/or used in accordance with

appropriate electrical codes and regulations.

Introduction: Thank you for your purchase of a Knoll DIR21

digital infrared receiver. This receiver features a long indoor
usable range and it can be used in direct sunlight and near
plasma and other TV’s. It is designed to act as a remote
receiver of remote control signals that when passed through a
connection module and emitters, relays remote infrared
commands to equipment in a distant room.

Features:

• Inwall junction box design,
available in white, ivory, almond
and black colors.

• Will relay almost all remote
control types (except some B&O
and Pioneer Elite models).

• Can be connected with almost
any 3-conductor wire including
cat 5.

• Connects with a three-wire
connector or RJ45 via cat 5 wire.

• Requires DIR54, DIR55 or DIR58 connection module,
power supply and emitters to work.

• Up to 10 or more DIR21’s and other compatible models
can be connected in a single system.

• Connects with a three wire connector or RJ45.

System
power
on LED

IR
Receiver

Blue
talkback
LED

Installation Tips

1. Follow all local electrical & building code requirements.

2. The DIR21 is usually wall mounted at light switch height. It
does not normally require a junction box. In order to work it
requires a PS1202 (200 mA) or PS1205 (500 mA) 12 VDC
unregulated power supply, IR31 (single) or IR34 (dual) emitters
and one of the following: DIR54 (decora inwall style, 4 output),
DIR55 (tabletop style, 4 output) or DIR58 (wall mount or SMC
style, 8 output) connection block.

3. Wires can be solid or stranded, shielded or unshielded with a
minimum of 28 gauge for runs under 200’, 22 gauge for runs
under 500’ and 20 gauge for runs up to 1000’. Wires can be
looped from DIR21 to DIR21 or home run. Home runs generally
offer more reliability and future flexibility.

4. DIR21’s can be mixed and matched in larger systems with up
to 10 DIR infrared receivers, such as the Knoll DIR10 or DIR25.

5. When using a DIR connection block, connect the DIR21
+12vdc, GND and SIG terminals to the corresponding DIR55
terminal. Prepare the wire leads to and from the DIR receiver by

PS1202

DIR21

Digital
Infrared
Receiver

RJ45

DIR21

Digital
Infrared
Receiver

RJ45

DIR55

12V

GND

SIG

Digital
Connection
Block

Note:DIR21’s are
wired in parallel

12 V DC Power Supply

Receiver

IR31A

CD

IR34A

Dish

IR34A

RJ45

171

stripping about ¼” of the insulation from each of the 3 leads.
Twist the strands tightly together so that they do not stick out
of the connector and cause a short circuit. Be sure to observe
polarity. If you are connecting with the RJ45 connector you may
need a RJ45 paralleling strip to parallel connect the wires from
multiple DIR receivers.

6. Next plug in the single or dual emitters into the DIR
connection block.

7. Then plug in the PS1202 (for up to five receivers) or PS1205
for five to eleven receivers.

8. The infrared system is usually left plugged in all the time (to
an unswitched outlet) as it uses very little power.

9. Test the digital infrared system to see if it is working
properly. If it works only from a very close range or it does not
work at all, first mark where the pot adjustment is on the DIR
connection block blue color pot. This is so you can reset it to
that starting point again. Try adjusting the pot on the
connection block very slightly left and right as you are testing
the receiver with the remote control. This may require two
people. This should correct for the problem. If it still does not
work properly, please call Knoll Systems and ask for infrared

technical
support at 1
800 566 5579.
The help line is

DIR21

Digital
Infrared
Receiver

Blue
talkback
LED

normally open
from 7:30 AM to
5:00 PM
Monday to
Friday Pacific
time.

RJ45

DIR
Receiver