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GIC

Global Interlock Controller

LIC

Local Interlock Controller

PAC

Programmable Automation Controller

PLC

Programmable Logic Controller

SIL

Safety Integrity Level

SRCF

Safety-Related Control Function

TÜV

Technischer Überwachungsverein (German) (English: Technical Inspection Association) An internationally accepted independent testing and certification organization.

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Global Interlock System

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Overview

The GIS is not a single device instead, the GIS is a distributed group of devices working together to form an overall safety system. These devices are safety-rated Allen-Bradley GuardLogix® Programmable Automation Controllers (PAC) and safety-rated Guard I/O modules. Communication throughout the GIS is conducted over a redundant independent safety network. This network communication utilizes a network-independent safety protocol, which has been certified for use in SIL3-rated applications.

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  1. Optical Support System (OSS)

    1. Top End Optical Assembly (TEOA)

    2. M1 Assembly

    3. Feed Optics

    4. Polarization Analysis and Calibration (PAC)

  2. Mount Base

    1. Telescope Mount Assembly

  3. Coudé Rotator

    1. Coudé Drive Controller

    2. Coudé Environmental Systems

  4. Instrumentation

    1. Wave Front Controller

    2. Visible Broadband Imager

    3. Visible Spectropolarimeter

    4. Diffraction Limited Near-IR Spectropolarimeter

    5. Cryogenic Near-IR Spectropolarimeter

    6. Visible Tunable Filter

    7. Camera System

  5. Facility Thermal System

    1. Facility Thermal Control System

  6. Enclosure Motion

    1. Enclosure Motion Control

  7. Facilities

    1. Facility Equipment

qty

catalog number

description

status

2

1756-L63S

GuardLogix Controller 8 MB

discontinued

2

1756-L62S

GuardLogix Controller 4 MB

discontinued

4

1756-LSP

GuardLogix Safety Partner

discontinued

1

1756-L72S

GuardLogix 5572S Automation Controller 4MB/2MB

active

1

1756-L7SP

GuardLogix 5572S Safety Partner processor

active

1

1756-L83ES

GuardLogix 5580, Safety Controller 10MB

active

1

1756-L8SP

GuardLogix 5580, Safety Partner Controller

active

Independent Safety Network

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