The contactor disconnects the motor's mains when the emergency stop contact is open. Please
refer to the schematics shipped together with the sat-nms ACU-ODU to see how to connect the
emergency stop switch.
Here the mains and emergency switch and are connected. Please refer to the schematics
shipped together with the sat-nms ACU-ODU to see how to connect them. The limit switches and
angle encoders are connected directly to the ACU-ODM (1), the motors have to be connected
directly to the motor drivers (4).
The sat-nms ACU-ODU is equipped with a temperature controlled heater. In delivery state the
thermostat is set to 10°C, that means as soon as the temperature in the cabinet falls below 10°C
the heater switches to on state.
For using the sat-nms ACU-ODU in very hot regions, it is possible to equip the sat-nms ACU-
ODU with an optional temperature controlled fan. By this way it is possible to ensure the
availability of the sat-nms ACU-ODU in hot ambients. ATTENTION: If the unit is equipped with an
optional air ventilation, avoid contact with jets of water, rain is no problem. Through the build-in
ventilator the protection class is only IP54. The thermostat for the fan is normally set to 40°C, that
means the fan switches on as soon as the temperature of the cabinet raises above 40°C. We
strongly recommend not to set this threshold below 40°C. The reason for this is, that in the winter
the heater and the fan work against each other. In worst case the fan and the heater run parallel
over a longer time. This behavior is avoided through setting the fan threshold to 40°C.
The following chapter describes how to install the ACU-ODU mechanically and electrically.
Additional a detailed start-up procedure is given in this chapter.
The sat-nms ACU-ODU is integrated into an outdoor cabinet that could be mounted outside
directly at the antenna. There are 2 possibilities to mount the sat-nms ACU-ODU:
If you mount the sat-nms ACU-ODU to a plain wall, make sure that the cabinet has a
minimum distance of 5mm to the wall to ensure that the rain-roof will not be damaged
through mounting the cabinet.
If you mount the sat-nms ACU-ODU to an antenna mast, first fix 2 strong metal bars (e.g. C-
Bars) in horizontal direction to the mast. After that, fix the sat-nms ACU-ODU to these metal
bars Use at least M8 or comparable screws to fix the sat-nms ACU-ODU. On the following
picture you can see an example where the sat-nms ACU-ODU is fixed to the antenna mast
with C-Bars and according special nuts. These C-Bars can optionally be ordered at
(C) 2022, SatService GmbH
www.satnms.com
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