Short-Circuit Protection; Technical Data - OJ Electronics RHX2M Bedienungsanleitung

English / Instruction
Step motor controller
The step motor controller must be installed so as to allow free air circulation around
the cooling fins and preferable with the cable entries facing downwards. The
controller should be secured 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 illustrated in fig. 2.
To facilitate connection, the controller and step motor are equipped with motor ca-
ble and female and male connector respectively. The connectors must be pressed
firmly together until the locks engage.
Connect Modbus to screw terminals labelled with GND, A & B or via an RJ12/6P6C
plug. Mount the RJ12/6 plug after the cable has been run through the screwed
connection.
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 a metallic 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 whenever 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 connec-
tion 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 trans-
ferred between 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.
22
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 . . . . 1 x max. 1.5 mm2 screw terminals + 2 x RJ12/6P6C plugs
Rotation guard . . . . . . . . . . . . . . . . (built-in 1.1 kΩ pull-up to +10 V) inductive sensor
Reversing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (built-in 10 kΩ pull-up to +10 V)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital input
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
© 2016 OJ Electronics A/S
RHX2M