OJ RHX2M Serie Handbuch Seite 8

Ved overbelastning taber stepmotoren
synkroniseringen, og afgiver et mindre
pulserende moment. Det opleves som motorenz
"hakker", støjer, og ikke drejer korrekt rundt.
Hverken styring eller motor beskadiges herved.
Motoren kan genstartes og rotere normalt, så
snart rotoren er justeret korrekt, og kan drejes
med normalt moment.
MILJØ OG BORTSKAFFELSE
Hjælp med at beskytte miljøet, ved at bortskaffe
emballage og brugte produkter, på en miljørigtig
måde.
Bortskaffelse af produktet
Produkter med dette mærke, må
ikke bortskaffes som almindeligt
husholdningsaffald, men skal
indsamles særskilt i henhold til de
gældende lokale regler.
OJ ELECTRONICS A/S
Stenager 13B · DK-6400 Sønderborg
Tel. +45 73 12 13 14 · Fax +45 73 12 13 13
oj@ojelectronics.com · www.ojelectronics.com
CE MÆRKNING
OJ Electronics A/S erklærer under ansvar, at
dette produkt opfylder Rådets Direktiv 92/31 og
efterfølgende ændringer om elektromagnetisk
kompatibilitet samt Rådets Direktiv 73/23 og
efterfølgende ændringer om elektrisk materiel
bestemt til anvendelse indenfor visse spæn-
dingsgrænser.
Benyttede standarder
EN 61000-6-2 og EN 61000-6-3
Elektromagnetisk kompatibilitet (EMC)
EN 60947-4-3:2001 Koblingsudstyr for
lavspænding (LVD)
Produktet er tænkt inkorporeret i maskiner eller
samlet med andre maskindele til indsættelse i
maskiner dækket af RÅDETS DIREKTIV
98/37/EØF med senere ændringer. Derfor
opfylder det ikke bestemmelserne i dette
direktiv i alle henseender.
English
LIST OF FIGURES
The following figures are located at the back of
the instructions:
Fig. 1: Mechanical dimensions of step motor
controller
Fig. 2: Electrical connections
Fig. 3: Rotation guard installation
Fig. 4: Mechanical dimensions of step motor
Fig. 5: Example of mounting plate
Fig. 6: Motor pulleys for max. torque
Fig. 7: Motor pulleys for fewer variants
Fig. 8: 0-10 V control
Fig. 9: Compensation for non-linear heat transfer
Fig. 10: Modbus connections
Fig. 11: Electrical connections Rotorguard
INTRODUCTION
RHX2M is a step motor control system for accu-
rate and quiet control of rotary heat exchangers
in ventilation systems.
The system consists of a step motor controller,
a step motor and a rotation guard. The rotation
guard monitors whether the rotor turns as re-
quired.
RHX2M is designed to provide accurate control
of rotor speed, thus allowing energy efficient
heat recovery.
8
PRODUCT PROGRAMME
Type Product
RHX2M-1212 VVX controller and motor 2 Nm
Modbus 0-10 V DC IP54
RHX2M-1412 VVX controller and motor 4 Nm
Modbus 0-10 V DC IP54
RHX2M-1612 VVX controller and motor 6 Nm
Modbus 0-10 V DC IP54
FUNCTION
RHX2M-1x12 is an advantageous replacement
for traditional geared motor solutions. In con-
trast to geared motors, which lose torque at low
and high speeds, the step motor provides an
even torque throughout the entire speed range.
Thanks to the linearity of the step motor torque
curve, there is a much larger range in which
rotor speed can be accurately controlled. This
enables heat recovery to be energy-efficiently
controlled and provides more precise tempera-
ture control.
RHX2M can be controlled by either a 0-10 V
signal or Modbus. It is therefore suitable for
connection to traditional ventilation system con-
trols or for more advanced systems like OJ-Air2
from OJ-Electronics.
The step motor is controlled in micro steps via
constant sine-wave current to ensure motor
shaft rotation with steady torque all the way
round. Torque pulses are thus avoided, ensuring
quiet operation.
PROHIBITION ON USE
It is hereby declared in accordance with executive
order 561/94 issued by the Danish Working Envi-
ronment Authority that the product must not be
taken into use until the machine/system in which
it is to be incorporated has in its entirety been de-
clared to be in conformity with all relevant require-
ments of the Machinery Directive 98/37 EEC and
any applicable national regulations.
The product must not be energised until the en-
tire installation complies with ALL relevant EU
directives.
The product carries a manufacturer's warranty if
installed in accordance with these installation
instructions and current installation require-
ments.
If the product has been damaged in any way,
e.g. during transport, it must be inspected and
repaired by authorised personnel before being
connected to the power supply.
INSTALLATION
RHX2M is designed to be installed inside the
heat exchanger housing.
Step motor controller
The step motor controller must be installed so
as to allow free air circulation around the cool-
ing fins and preferable with the cable entries
facing downwards. The controller should be se-
cured in place using the four screw holes on the
sides of the unit, see fig. 1.
Electrical connections
The 230 V mains cable must be protected by a
separate type G fuse. Connections are illus-
trated in fig. 2.
To facilitate connection, the controller and step
motor are equipped with motor cable and fe-
male and male connector respectively. The con-
nectors must be pressed firmly together until
the locks engage.
Modbus is connected via an RJ12/6 connector,
which must should be attached after the cable
has been fed through the entry.
© 2011 OJ Electronics A/S
Rotation guard
OJ Rotorguard consists of an inductive sensor.
A sensor plate must be fitted to the rotary heat
exchanger. The sensor plate must be of mag-
netic material, e.g. the head of a bolt, a screw or
similar.
OJ Rotorguard must be fitted as shown in fig. 3
and connected to terminals 9, 10 and 11 of the
RHX2M controller (see fig. 2 + 11).
Once OJ Rotorguard has been correctly fitted,
the green LED of the controller will flash when-
ever the sensor plate passes OJ Rotorguard.
Step motor
The step motor is equipped with four holes (see
fig. 4) to facilitate attachment to a mounting
plate. Se example in fig. 5. The mounting plate
must be short, rigid and equipped with vibration
dampers in order to prevent noisy resonances
from being transferred to the rotor housing. To
prevent the step motor from being damaged by
static electricity, potential equalisation must be
ensured by establishing a connection between
the step motor frame and the ventilation unit
chassis (fig. 5).
Motor pulley
The pulley must be attached using a set screw,
which should grip the flat side of the motor
shaft. See fig. 4.
Greatest rotor torque can be achieved using a
small pulley as motor torque is transferred be-
tween rotor and pulley by the transmission ratio
(N) (see figs 6 and 7). The pulley must, however,
be large enough to obtain the required rotor
speed and must be capable of transferring
power to a belt tensioned in accordance with
the max. radial load of the motor. Se section on
technical data.
Safety features
All control signals are galvanically separated
from the 230 V mains voltage. Output voltage
for the step motor is galvanically separated and
limited to max. 48 V.
Short-circuit protection
All inputs and outputs are protected against
short-circuiting in order to prevent the controller
from being damaged if incorrectly connected or
if the step motor malfunctions.
Thermal protection
RHX2M has built-in thermal protection which
prevents the electronic components from being
overloaded.
TECHNICAL DATA
Input signals
Supply voltage . . . . .50-60 Hz, 230 V AC ±15%
Max. pre-fuse: . . . . . . . . . . . . . . . . . . . . . . . .6 A
Control voltage . . . . . . . . . . . . . . . . . .0-10 V DC
Impedance (control voltage) . . . . . . . . . . .10 kΩ
Serial communication . . . . . . . .RS485 Modbus
Modbus connection . . . .2 x RJ12/6 connectors
Rotation guard(built-in 1.1 kΩ pull-up to +10 V)
Reversing . . . . . (built-in 10 kΩ pull-up to +10 V)
Output signals
Relay output for alarm . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .Change-over relay NO 5 A, 250 V
LED indicator . . . .3-coloured (green/yellow/red)
Torque . . . . . . . . . . . . . . .2 Nm, 4 Nm and 6 Nm
Transmission ratio motor/rotor . . . . . .1:50 max.
Supply voltage for Hall element . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .+10 V DC, max. 100 mA
Environment data
Power consumption (standby/holding torque) . .3 W
Ambient temperature, operation . . . .-20/+40°C
Ambient temperature, storage . . . . . .-20/+60°C
Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . .IP54
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6 kg
inductive sensor
Digital input