Below the connector layout of the ACU outdoor module is shown. Except the network connector which is a standard 10-Base-T Ethernet socket, all connectors are Phoenix Contact mini Combicon plugs / clamps which are delivered together with the sat-nms ACU2-ODM. Pin 1 of each connector is the rightmost if you look at the screws of the connector and the plugs are directed to you.

Inside, the ACU consists of a main board and two or three interface boards with the circuitry for the position sensors. These boards are different for each type of position sensor. Actually interfaces for three types of position encoders are available with the sat-nms ACU:

• resolvers
• SSI digital position encoders
• analog voltage based sensors

Additional there are expansions boards available to realize a fourth axis. There are two boards necessary to realize a full axis control:

• axis control board as interface to the motor driver
• position sensor board (resolvers or digital or analog voltage sensors)