APS Technical Update

April 10, 1996

APS TECHNICAL UPDATE - No. 7 - Rev. 1

Subject: Beamline Equipment Protection System to Personnel Safety System (PSS)

The enclosed document is for use by the CAT beamline designers. As APS staff gains more experience in implementing the interface control between the PSS and the machine protection systems (MPS), changes in the design may be implemented. The APS will keep you informed of such changes.

For additional information contact:

Julie Cross - User Technical Interface
jox@aps.anl.gov
Telephone - 630.252.0592

Updated: October 4, 2007

GENERIC INTERFACE CONTROL DOCUMENT

ARGONNE NATIONAL

LABORATORY

BEAMLINE EQUIPMENT PROTECTION SYSTEM

TO

PERSONNEL SAFETY SYSTEM

TABLE OF CONTENTS

1.	SCOPE			8
2.	APPLICABLE DOCUMENTS			8
	2.1	APS Documents		8
	2.2	Drawings		8
	2.3	Precedence		8
		2.3.1	This design specification	8
		2.3.2	Documents referenced to the extent referenced herein	8
3.	OVERVIEW OF EQUIPMENT AND RESPONSIBILITIES			9
	3.1	Segment 1 Beamline Shutter Permit		9
		3.1.1	Description	9
		3.1.2	Responsibility	9
	3.2	Segment 1 Beamline Shutter Closed		9
		3.2.1	Description	9
		3.2.2	Responsibility	9
	3.3	Segment 2 Beamline Shutter Permit		9
		3.3.1	Description	9
		3.3.2	Responsibility	10
	3.4	Segment 2 Beamline Shutter Closed		10
		3.4.1	Description	10
		3.4.2	Responsibility	10
	3.5	Mono Beam Mode		10
		3.5.1	Description	10
		3.5.2	Responsibility	10
	3.6	White Beam Mode		10
		3.6.1	Description	10
		3.6.2	Responsibility	10
4.	EXAMPLES			10
	4.1	This scenario is taken form the Sector 1 BLEPS.		10
	4.2	This scenario is taken from the Sector 1 BLEPS.		12
5.	INTERFACE CHARACTERISTICS			13
	5.1	Physical Requirements		13
	5.2	Interface Operation		13
	5.3	Mechanical Interface		13
		5.3.1	Terminal Blocks	13
		5.3.2	Cable	13
		5.3.3	Fuses	14
	5.4	Electrical/Electronic Interface		14
6.	SAFETY CONSIDERATIONS			14
	6.1	Voltage		14
	6.2	Fail-Safe		14

LIST OF FIGURES

Figure 5.1	PSS-to-BL EPS INTERFACE DIAGRAM	13
Figure 6.1	PSS-to-BL EPS WIRING DIAGRAM	15

ACRONYMS

Some of the frequently appearing or unique acronyms used in this document follow. This list is provided as a quick closed reference for the reader's convenience.

ACIS	Access Control and Interlock System
APS	Advanced Photon Source
AWG	American Wire Gauge
BL	Beamline
BM	Bending Magnet Beamline
CT	Cable Tray(600 Volt rated cable meet NEC-340)
E&C	Engineering & Construction Group
ECT	Electronics & Computing Technologies Division
EPS	Equipment Protection System
ICD	Interface Control Document
NC	Normally Closed Relay Contacts
NO	Normally Open Relay Contacts
PLTC	Power Limited Tray Cable (300 Volt rated cables meet NEC-725)
PS	Photon Shutter
PSS	Personnel Safety System
SS	Safety Shutter
TBD	To Be Determined
XFD	Experimental Facilities Division
FE shutters	shall imply simultaneous action of PS2, SS1 & SS2.

REVISION RECORD

Revision	Dated	Comments
1	April 10, 1996

1. SCOPE

This Generic Interface Control Document (GICD) addresses the Personnel Safety System(PSS)-to-Beamline (BL) Equipment Protection System (EPS) interface.

2. APPLICABLE DOCUMENTS

The following documents form a part of this specification to the extent specified herein.

2.1 APS Documents

Document No. 1111-00001-00 APS Quality Assurance Plan, document dated May 1990.

2.2 Drawings

2.3 Precedence

In the event of conflict between the provisions of this specification and other documents, the following precedence shall apply.

2.3.1 This design specification.

2.3.2 Documents referenced to the extent referenced herein.

3. OVERVIEW of EQUIPMENT AND RESPONSIBILITIES

The BL EPS primary responsibility is to ensure that BL components are protected from damage or destruction while the FE & BL shutter(s) are open.

The PSS-to-BL EPS or BL EPS-to-PSS signals for a beamline are as follows:

3.1 Segment 1 Beamline Shutter Permit

3.1.1 Description

This signal makes known to the PSS a BL EPS demand to close the most upstream Beamline integral shutter excluding the front end shutters. Typically this is located in Station A (FOE). The most upstream beamline shutter may depend on the PSS beam mode selected. IF the Segment 1 Beamline Shutter Permit is set to 0 (clear=0), the PSS will close the Segment 1 beamline shutter. The Segment 1 Beamline Shutter Permit is reset (set=1) upon achieving all conditions necessary to make the BLEPS ready to receive beam downstream of the Segment 1 beamline shutter. The Segment 1 beamline shutter is opened via the PSS.

3.1.2 Responsibility

The Segment 1 Beamline Shutter is the responsibility of the BL EPS.

3.2Segment 1 Beamline Shutter Closed

3.2.1 Description

This signal provides feedback about shutter position status (open/closed) to the BL EPS. If the Segment 1 Beamline Shutter is closed the signal is true (set=1). The PSS should update this signal only with the shutter in the full open/closed position.

3.2.2 Responsibility

The Segment 1 Beamline Shutter Closed status signal is the responsibility of the PSS.

3.3 Segment 2 Beamline Shutter Permit

3.3.1 Description

This signal makes known to the PSS a BL EPS demand to close the Beamline integral shutter immediately downstream of the Segment 1 Beamline Shutter, excluding the front end shutters. IF the Segment 2 Beamline Shutter Permit is set to 0 (clear=0), the PSS will close the Segment 2 beamline shutter. The Segment 2 Beamline Shuter Permit is reset (set=1) upon achieving all conditions necessary to make the BLEPS ready to receive beam downstream of the Segment 2 beamline shutter. The Segment 2 beamline shutter is opened via the PSS.

3.3.2 Responsibility

The Segment 2 Beamline Shutter Permit is the responsibility of the BL EPS.

3.4 Segment 2 Beamline Shutter Closed

3.4.1 Description

This signal provides feedback about shutter position status (open/closed) from the PSS to the BL EPS. If the Segment 2 beamline shutter is closed the signal is true (set=1), otherwise it is clear. The PSS should update this signal only with the shutter in the full open/closed position.

3.4.2 Responsibility

The Segment 2 Beamline Shutter Closed status signal is the responsibility of the PSS.

3.5 Mono Beam Mode

3.5.1 Description

This signal if set (=1) informs the BL EPS that, via a PSS control panel, the beamline is configured for mono beam operation. Beamline operation is configurable for either white beam, mono beam or none.

3.5.2 Responsibility

The Mono Beam Mode signal is the responsibility of the PSS.

3.6 White Beam Mode

3.6.1 Description

This signal if set (=1) informs the BL EPS that, via a PSS control panel, the beamline is configured for white beam operation. Beamline operation is configurable for either white beam, mono beam or none.

3.6.2 Responsibility

The White Beam Mode signal is the responsibility of the PSS.

4. Examples

4.1 This scenario is taken from the Sector 1 BL EPS.

Beamline Status Condition:

All beamline valves and shutters (FE & BL) are open.

Beamline is in mono beam mode.

All vacuum and controller inputs are within limits.

Alarm Condition:

Mirror temperature trip develops downstream of Shutter C (Segment 2 Beamline shutter).

BL EPS Action:

The BL EPS demands the PSS to close upstream Segment C Shutter C (Segment 2 beamline shutter) by setting Segment C Interlocks OK (Segment 2 Beamline Shutter Permit) false (clear=0). If within a specified time period the feedback signal, Segment C Shutter Closed (Segment 2 Beamline Shutter Closed) (set=1), is received, no further action is required by the BL EPS. Valves can be opened/closed downstream of the shutter from the BL EPS panels. The BL EPS resets (clear=0) Close Segment C Shutter (Segment 2 Beamline Shutter Permit) based on conditions.

If not within a specified time period, the BL EPS will request the PSS to close the next upstream shutter. Again, the BL EPS demands the PSS to close upstream Station A Shutter by setting Station A Interlocks OK (Segment 1 Beamline Shuter Permit) false(clear=0). If within a specified time period the feedback signal, Station A Shutter Closed (set=1) is received, no further action is required. The BL EPS resets (clear=0) Station A Interlocks OK based on conditions.

If the next shutter happens to be the FE shutters, the BL EPS sets the Beamline Interlocks OK false (clear=0). This lets the FE EPS know that the beamline has an alarm condition and requires the FE EPS to close the FE shutters. The BL EPS looks for a returned status that the FE shutters have closed (set=1).

4.2 This scenario is taken from the Sector 1 BL EPS.

Beamline Status Condition:

All beamline valves and shutters (FE & BL) are open.

Beamline is in white beam mode.

All vacuum and controller inputs are within limits.

Alarm Condition:

Vacuum leak detected by white beam fixed stop vacuum controller.

BL EPS Action:

Note: Experiments conducted in 1-BM Station B using white beam require the absorber and stop to be in the down and up position, respectively, and locked (Kirk key).

Since the shutter in Station A (i.e., Segment 1 shutter) is locked during white beam operations, the next upstream shutter is the FE shutters. The BL EPS clears the Beamline Interlocks OK (clear=0) signal. This informs the FE EPS that the beamline demands the FE shutters to be closed. The BL EPS looks for a return status that the FE shutters are closed (set=1). With the FE shutters closed, the VAT valve downstream of the fixed stop is closed. Upstream there is a window. The BL EPS takes no further action.

Note, the BL EPS system prevents the closed VAT valve from opening, isolating the leak. Beamline vacuum conditions must be restored before the valve is allowed to be opened.

5. INTERFACE CHARACTERISTICS

The interface is, mechanically, an instrumentation (tray rated) cable terminated using rail-mounted terminal blocks installed in the PSS and BL EPS's cabinets. Four PSS-to-BL EPS and two BL EPS-to-PSS are required between the PSS and BL EPSs. A block diagram of the interface is shown in Figure 5-1 below.

Figure 5.1 PSS-to-BL EPS INTERFACE DIAGRAM

5.1 Physical Requirements

There are no related human physical requirements for this interface.

5.2 Interface Operation

Document(s)/drawing(s) that detail wiring to terminal blocks and equipment can be found in the following documents: (TBD).

5.3 Mechanical Interface

Devices that interface signals between safety systems include rail-mounted terminal blocks and an interface cable.

5.3.1 Terminal Blocks

The mechanical interface is a series of front-entry rail mounted terminal blocks (TS35) located inside the PSS and BL EPS cabinets. Devices that interface signals between systems include connectors, TS35 mounting rail and cable. See Figure 4-2.

5.3.2 Cable

The interface cable is a 20 conductor, 20 AWG, foil shield Alpha No. 45470/20. The cable is classified as Power Limited Tray Cable (PLTC). Tray cable is a factory-assembled multiconductor or multipair control, signal, or power cable specifically approved under the National Electrical Code (NEC) for installation in cable trays.

5.3.3 Fuses

The power distribution wiring in the PSS cabinet shall be fuse protected at the bus with two fuses. Both the +24VDC and DC common lines shall be fused. Fuse specifications: 3A fast-acting.

5.4 Electrical/Electronic Interface

All interface signals shall utilize +24VDC voltage level. All PSS-to-BL EPS interface signals shall be relay isolated. Outputs from the PSS and BL EPS will drive relay coils. The contacts of these output relays shall be used as inputs by the interfacing system. The main interface cable shall be protected against dead shorts to ground by fusing either the individual cable or at the DC distribution bus.

6. Safety Considerations

6.1 Voltage

Low voltage (+24Vdc) circuitry is used to monitor the position.

6.2 Fail-Safe

By using a normally open (NO) set of contacts, the system is inherently fail-safe to faults such as loss of power, shorts and disconnected cables. All PSS-to-BL EPS interface signals must be relay isolated. Outputs drive relay coils and inputs use dry contacts rated for 24VDC operations at roughly 0.1 to 0.5 amps.

Personnel Safety System-to-Beamline EPS Generic ICD

Figure 6.1 PSS-to-BL EPS WIRING DIAGRAM

Reserved

Black

Black

Reserved

BL EPS +24Vdc

Red

Red

BL EPS +24Vdc

PSS +24Vdc

White

White

PSS +24Vdc

Reserved

Green

Green

Reserved

Segment 1 Shutter Permit

Orange

Orange

Segment 1 Shutter Permit

Segment 2 Shutter Permit

Blue

Blue

Segment 2 Shutter Permit

SPARE A

Brown

Brown

SPARE A

SPARE B

Yellow

Yellow

SPARE B

Violet

Violet

Gray

Gray

Pink

Pink

Tan

Tan

Segment 1 Shutter Closed

Red/Green

Red/Green

Segment 1 Shutter Closed

Segment 2 Shutter Closed

Red/Yellow

Red/Yellow

Segment 2 Shutter Closed

Mono Beam Mode

Red/Black

Red/Black

Mono Beam Mode

White Beam Mode

White/Black

White/Black

White Beam Mode

White/Red

White/Red

White/Green

White/Green

White/Yellow

White/Yellow

White/Blue

White/Blue

Extra text

Reserved	Black	Black	Reserved
BL EPS +24Vdc	Red	Red	BL EPS +24Vdc
PSS +24Vdc	White	White	PSS +24Vdc
Reserved	Green	Green	Reserved
Segment 1 Shutter Permit	Orange	Orange	Segment 1 Shutter Permit
Segment 2 Shutter Permit	Blue	Blue	Segment 2 Shutter Permit
SPARE A	Brown	Brown	SPARE A
SPARE B	Yellow	Yellow	SPARE B
	Violet	Violet
	Gray	Gray
	Pink	Pink
	Tan	Tan
Segment 1 Shutter Closed	Red/Green	Red/Green	Segment 1 Shutter Closed
Segment 2 Shutter Closed	Red/Yellow	Red/Yellow	Segment 2 Shutter Closed
Mono Beam Mode	Red/Black	Red/Black	Mono Beam Mode
White Beam Mode	White/Black	White/Black	White Beam Mode
	White/Red	White/Red
	White/Green	White/Green
	White/Yellow	White/Yellow
	White/Blue	White/Blue