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Operating Instructions for RX-7-DR M-LINK /
RX-9-DR M-LINK 2.4 GHz receivers
MULTIPLEX Modellsport GmbH & Co.KG • Westliche Gewerbestraße 1 • D-75015 Bretten (Gölshausen) • www.multiplex-rc.de Page 1/6
Ins
tr
uc
tions
for
R
X
-7
/9-
D
R
M-
LIN
K
2.
4 G
H
z r
e
ce
iv
er
s # 985 531
9 (
10-
02-
24/M
IW
A
) •
E
rr
o
rs
and om
is
si
ons
ex
cepted! •
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MU
LT
IP
LE
X
!
These operating instructions are an integral part
of the product, and contain important information
and safety notes. Please store them in a safe place,
where you can find them at any time, and pass
them on to the new owner if you sell the receiver.
1.
S
PECIFICATION
RX-7-DR M-LINK
RX-9-DR M-LINK
Order No.
# 5 5811
# 5 5812
Reception system
2.4 GHz FHSS M-LINK
Frequency Hopping Spread Spectrum
MULTIPLEX-LINK
Servo channel count
7 9
Servo frame rate
Fast Response: 14 ms
Standard: 21 ms
Signal resolution
12-bit, 3872 steps
Current drain
Approx. 60 mA (excl. servos)
Aerial length
Total: approx. 20 cm (2 x),
of which feed cable approx. 17 cm and
active aerial section approx. 3 cm
Operating voltage
3.5 V … 9.0 V
Î
4 - 6 NiCd / NiMH (NiXX) cells
Î
2S LiPo / LiIo
Operating
temperature range
- 20°C … + 55°C
Weight
19 g
Dimensions
Approx. 49.0 x 34.0 x 11.5 mm
2.
S
PECIAL
F
EATURES
x
High-quality 7-channel / 9-channel receivers assembled
using the latest SMT methods, exploiting MULTIPLEX
2.4 GHz M-LINK technology, suitable for all types of model.
x
Dual
receivers:
Each receiver features two complete reception circuits
working in parallel (receiver diversity).
This ensures excellent reception quality by minimising
directional effects.
x
Supplementary signal pre-amplification:
For highest possible sensitivity.
x
In-line
connector
arrangement:
Ideal for models with limited internal space.
x
HOLD / FAIL-SAFE function.
x
Integral SET button and LED:
For binding, FAIL-SAFE programming, RESET and
displaying operating status information.
x
Telemetry / feedback channel capability:
Receiver battery voltage and connection quality
= standard features.
Integral sensor interface for connecting external sensor
modules.
x
Prepared for two-receiver operation:
Diversity lead (
# 8 5070
) required.
x
Integral error counter / data logger:
For voltage and signal errors.
x
Compatible with the
MULTImate
(
# 8 2094
).
x
Integral
PC
interface:
Carry out updates and change settings using the
RX DataManager
PC program.
3.
S
AFETY
N
OTES
!
Please read the instructions before using the receiver.
!
Use the receiver only for the intended applications
(
Î
4.).
!
Ensure the power supply is of adequate capacity (
Î
6.).
!
Observe the installation notes (
Î
18.).
!
Carry out regular range checks (
Î
13.).
4.
A
PPLICATIONS
The
RX-7-DR M-LINK
and
RX-9-DR M-LINK
2.4 GHz receivers
(abbreviated to
RX-7/9-DR M-LINK
in this document) are radio
control receivers intended exclusively for use in model sport. It is
prohibited to employ them for other purposes such as full-size
(people-carrying) vehicles or industrial installations.
5.
C
OMPATIBILITY
RX-7/9-DR M-LINK
2.4 GHz receivers can only be operated in
conjunction with transmitters which utilise MULTIPLEX M-LINK
transmission technology.
These are as follows (correct as of February 2010):
x
ROYALpro 7
,
9
and
16 M-LINK
.
x
ROYALevo
or
pro 7
,
9
and
12
with firmware version V3.xx
and the HFM4 M-LINK 2.4 GHz RF module*.
x
PROFImc 3010
,
3030
and
4000
with the HFM3 M-LINK
2.4 GHz RF module*.
x
COCKPIT SX M-LINK
.
x
MULTIPLEX transmitters
with the HFMx M-LINK 2.4 GHz
RF module.
!
*
Note:
Unless stated otherwise, when this document refers to the
transmitter types
ROYALevo
,
ROYALpro
, and
PROFImc 3010
,
3030
and
4000
, the terms refer to the 2.4 GHz M-LINK versions.
6.
P
OWER
S
UPPLY
RX-7/9-DR M-LINK
receivers work within a broad range of vol-
tages from 3.5 V … 9.0 V, i.e. they can be used with receiver
batteries consisting of four to six NiXX cells or 2S LiPo / 2S LiIo.
!
Note:
if you intend to use a five-cell or six-cell NiXX battery,
or a 2S LiPo or 2S LiIo pack, it is essential to check that all the
servos, gyros and other components connected to the system
are approved for use with this higher operating voltage.
!
Note: ensure that the power supply is adequate
A power supply system in good condition and of adequate capa-
city for the specific application plays an indispensable role in the
safe operation of any model:
x
Use only high-quality receiver batteries of adequate capacity.
Balance and maintain them carefully, and charge them fully.
x
Ensure that all cables are of adequate conductor cross-
section. Keep all wiring as short as possible, and use the
absolute minimum of plug / socket connections.
x
Use high-quality switch harnesses exclusively.
x
Brief collapses in the power supply voltage (lasting a few
milli-seconds) have no adverse effect on the receiver. Longer
voltage collapses to below 3.5 V may cause a receiver reset,
resulting in a brief interruption in reception. This may be due
to a receiver battery which is almost flat, too weak or
defective, cables of inadequate cross-section, poor-quality
connectors or an overloaded or defective BEC system.
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