Mechanical Interfaces

Local Control Units


The table sumarizes the volume and location requirements for ESO LCUs and network equipment.
 
Equipment
Size
Cabinet
Location
Altitude LCU 19" VME Chassis
Depth: 500mm
Height: 7U
(6 for VME chassis + 1 for fan)
Altitude
See [RD 03], Section 5.1
Fork B side
Azimuth LCU
The entire left part of the Signal Cabinet is let for integration of ESO equipment.
See [RD 03], Section 5.4
Transporter
Sensor LCU
Auxiliary LCU
Adaptive Optics LCU
Dual Feed LCU
Network Equipment
3U x 500mm

Access to the back of each LCU cabinet is provided.
The signal cabinet will be movable for access to the rear side and to the GIS signal connection point
The Altitude cabinet will be mounted on sliding rails for easier maintenance access.
The Altitude VME occupies the top of the Altitude cabinet, above the M2 control chassis. Its ventilation is vertical. The air intake is done at the bottom of the VME, within the allocated 7U volume. The air exhaust is done at the top of the Altitude VME and requires a clearance of about 2 cm. The space between the top of the Altitude VME and the top cover of the Altitude cabinet is kept free for ventilation.

 

Detector and M6 drives

The mechanical interfaces of the Field Acquisition Sensor (TCCD + ACE controller) and the Field Stabilization Sensor (STRAP APD) are defined in AD 09, AD 10 and Drawing 03 of the Technical Specifications [RD 02].

Space and connection means shall be provided from Sensor LCU to FAS via the ROS plug for fibre installation (see [RD 02],  section 5.1.14).

Space and cooling capacity for electronics shall be provided in the vicinity (< 1.5 m) of M6. The minimum space required is: Width:19" VME Chassis, Height: 8HU, Depth: 600 mm including 100mm for connectors.

Pupil Beacon

Space and connection means shall be provided from Altitude LCU to M2 via the tube cable wrap for Pupil beacon fibre installation.see [RD15]

Nasmyth focus

In view of future installation of specific ESO equipment, the following requirements apply:

Nasmyth Beacon:
Space and connection means shall be provided from Altitude LCU to Nasmyth Wheel for Nasmyth beacon fibre installation (see [RD 02],  section 5.1.11).

Future Extensions

This section defines the internal interface requirements applicable to the ATS design in order to allow future installation of upgrades by ESO.

Adaptive Optics

Coudé focus environment

In view of the future installation of the Wave Front Sensor for adaptive optics, the following interface requirements apply:

Space and connection means for cable installation between the Wave Front Sensor and the Terminal Block located inside the Signal Cabinet shall also be provided.
Requirements:
Flanges shall be reserved for later installation of an additional Transporter/RO plug to accomodate the cables needed for future Adaptive Optics and Dual Feed. This additional plug will be installed by ESO. Its supply is outside the contract's scope. This plug shall be able to accommodate the most constraining of the two following connection schemes:

Space for Cables:
The space to be reserved for cable routing shall accommodate a cable fitting a 20mm thick rectangle (equivalent section of 30mm diameter) with a minimum bending radius of R=100mm running from the Transporter/RO plug to the two corresponding reserved spaces DWG7 and DWG8 of [RD 02].

Adaptive Optics LCU

Dual Feed

Coudé focus environment

In view of the future installation of the Dual Feed system at the Coudé focus, the following interface requirements apply:

Space and connection means for cable installation between M10df & M11b and the Terminal Block located inside the Signal Cabinet shall be provided,
Requirements are already included in those defined in previous section (cables for AO and WFS)


Dual Feed LCU

The space required is defined in Local Control Units.

Atmospheric Dispersion Corrector

The Relay Optics Structure shall provide an interface for future installation of an Atmospheric Dispersion Compensator (ADC). The following requirements apply:

Space and connection means for cable installation between the ADC and the Terminal Block located inside the Signal Cabinet shall be provided with the following characteristics:

Connection type & location

Terminal blocks

They are used for common electrical connections; these are referenced Zn and Yn.
Terminal block type:  (eg. Phoenix MTTB1.5, or Wago TBC)
Industrial Type
WAGO INTERFACE MODULE No.289-533 (Z1, Z5)
WAGO INTERFACE MODULE No.289-556 (Y33)
WAGO INTERFACE MODULE No.289-546 (Y333)
WAGO X-COM Serie 870 No.870-101( Z11, Z21, Z22, Z23)

ESO custom made Type:   
ATS-MODULE VME4SA-1 INTERFACE (Z3, Z10, Z12, Z16, Z17, Y20, Z34)
ESO-I/O Interface Adapter 9916-21 (Z18)

Serial interfaces

They will be connected through standardized DB9 connectors grouped together on a panel with front access. These are referenced Wn.

Heidenhain encoders

They will connect directly to the LCU, front panel of the IK320 interface. Connector type DB9

Optical fibre connection

See also [RD17] installation of ESO cables

ESO Terminal Blocks Yn

Terminal blocks referenced Yn are part of ESO supply.

 

Cooling

The cooling of the racks is under the contractor's responsibility. See [RD 03], Chapter 5.

Last modified: Wed Jan 150 10:20:44 MET 2003