Fortress Technologies ATOM User manual

Operating Instructions: ATOM
Description
ATOM is a compact, ultra-robust, RFID, interlocking device
with a high-level coded actuator. As typical with products
from Fortress Interlocks, ATOM is externally approved and
is suitable for applications up to PLe (Cat. 4). The metal
housing and high retention force then suits ATOM for heavier
industry applications.
The self-centering actuator allows for inaccuracy and
misalignment in moveable guards, both hinged and sliding.
Additionally, ATOM’s head has an open design manufactured
in stainless steel to prevent dust, dirt and corrosion from
impacting performance.
Available in multiple hardware variants, the device can be
congured for many applications. Multiple units can also be
connected together with OSSD (Output Signal Switching
Device) functionality preventing fault masking. The large
LED lens at the base provides clear state indication from all
angles and at a distance.
An Escape Release (ER) option is available for Safety-on-
guard-Locking (SOGL) variants.
Important:
The ATOM interlocking device (The Device) is designed for use according to the installation and operating instructions
enclosed. It must be installed by competent and qualied personnel who have read and understood the whole of this
document prior to commencing installation.
If the device is used in a manner not specied by the manufacturer, the protection provided by the device may be impaired.
Any modication to the device or deviation from these instructions invalidates all warranties.
The Device must be installed in electrical installations meeting the requirements of the applicable IEC standards.
The Device is not to be used as a Mains Isolator or Emergency Stop.
The Device is a component to be added to a permanent electrical installation meeting the requirements of the applicable IEC/
EN standards.
All the voltages used within the connected circuits must be derived from a Safety Extra Low Voltage or Protected Extra Low
Voltage power supply (SELV or PELV).
The device contains a single electrical circuit; all inputs outputs and power supply have a common voltage reference, 0V.
The Device meets the requirements of the standard ISO 14119 – Safety of machinery, interlocking devices associated with
guards. Principles for design and selection.
DO NOT LEAVE AUXILIARY RELEASE DRIVER BIT IN PLACE!
Access to the Auxiliary Release Driver Bit and the availability of any spare ATOM Actuator assemblies must be securely
controlled as they could make it possible to bypass the safety Devices and allow access to areas that may have a residual
hazard.
BEWARE OF INTENTIONAL MISUSE CAUSED BY OPERATORS WANTING TO BYPASS SAFETY SYSTEMS.
THE INSTALLER SHOULD ASSESS THE RISKS AND MITIGATE AGAINST THEM.
The installation and operation of the ATOM device must take into account the requirements of ISO 14119, in particular Section
7 - Design for minimising defeat possibilities.
In order to maintain device safety rating, overall system must be validated to BS ISO 13849-2 and/or evaluated in accordance
with BS 62061.
IF YOU HAVE ANY QUESTIONS OR QUERIES OF ANY NATURE WHATSOEVER PLEASE CONTACT THE SUPPLIER
WHO WILL BE PLEASED TO ADVISE AND ASSIST.
1

Operating Instructions: ATOM
General Data
ATOM Product Type
Power-to-release (unlock), Safety- on-Guard-Lock- ing Power-to-release (unlock), Safety- on-Guard Power-to-Lock, Safety-on-Guard
Housing Materials Passivated and painted Zinc Alloy to BS12844 ZA3 and Stainless Steel to
BS3146-2:1975 (ANC4B)
Mechanical Life 1,000,000 Switching Operations
Holding Force F5 kN 8 kN 8 kN
Holding Force FZh 6 kN 9.2 kN 9.2 kN
Maximum Holding Force, F1max 12 kN 12 kN 12 kN
Minimum Actuating Radius 150 mm (see g.5)
Maximum Actuating Frequency 720 Operations per Hour
Power-to-release (unlock)
Safety-on-Guard-Locking (SOGL)
Power-to-release (unlock)
Safety-on-Guard (SOG)
Power-to-Lock
Safety-on-Guard (SOG)
The recommended set up for most
machine guarding applications and
ideal for machines with run-down times.
The Device unlocks when power
supplied. Safety circuits change state
when the device locks or unlocks.
Popular conguration for where the
solenoid performs a process control
function rather than a safety function.
The Device unlocks when power
supplied. Safety circuits change state
when actuator is engaged or removed.
When power is supplied to the solenoid
the device becomes locked.
Allows for faster access and exit in the
event of a power failure or power off
event.
Safety circuits change state when
actuator is engaged or removed.
Part No. Solenoid
Locking Type Switch Conguration M12 Connector Types
Optional
Escape
Release
ATM-100A1-A Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) Single 5 Pin M12 No
ATM-100A2-A Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) 2 x 5 Pin M12 in
‘Daisy-Chain’ conguration No
ATM-100A3-A Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) Single 8 Pin M12 No
ATM-100A4-A Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) 2 x 5 Pin M12 No
ATM-110A1-A Power-to-release (unlock) Safety-on-Guard (SOG) Single 5 Pin M12 No
ATM-110A2-A Power-to-release (unlock) Safety-on-Guard (SOG) 2 x 5 Pin M12 in
‘Daisy-Chain’ conguration No
ATM-110A3-A Power-to-release (unlock) Safety-on-Guard (SOG) Single 8 Pin M12 No
ATM-110A4-A Power-to-release (unlock) Safety-on-Guard (SOG) 2 x 5 Pin M12 No
ATM-610A1-A Power-to-Lock Safety-on-Guard (SOG) Single 5 Pin M12 No
ATM-610A2-A Power-to-Lock Safety-on-Guard (SOG) 2 x 5 Pin M12 in
‘Daisy-Chain’ conguration No
ATM-610A3-A Power-to-Lock Safety-on-Guard (SOG) Single 8 Pin M12 No
ATM-610A4-A Power-to-Lock Safety-on-Guard (SOG) 2 x 5 Pin M12 No
ATM-100A1-A-ER1 Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) Single 5 Pin M12 Yes
ATM-100A2-A-ER1 Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) 2 x 5 Pin M12 in
‘Daisy-Chain’ conguration Yes
ATM-100A3-A-ER1 Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) Single 8 Pin M12 Yes
ATM-100A4-A-ER1 Power-to-release (unlock) Safety-on-Guard-Locking (SOGL) 2 x 5 Pin M12 Yes
2

Operating Instructions: ATOM
3
Environmental Data
Ingress Protection IP65 and IP67
Environment Type Indoor
Operational Pollution Degree (IEC 664) 2
Ambient Temperature -20˚C * to +55˚C (-4˚F to +131˚F)
*Note, the ATOM Device will only continue to work below freezing point (0°C) where it can be guaranteed that ice will not form on or in the device as it could
cause the mechanical parts to bind and jam.
Maximum Relative Humidity 50% at 70˚C
Maximum Altitude 2000m
Vibration Tested in accordance with GS-ET-19 and BS 60947-5-2
Electrical Data
Operating Voltage, Ue24V DC (+/- 10%)
Rated Insulation Voltage, Ui60V
Rated Impulse Withstand Voltage, Uimp 500V
Voltage Drop, Ud<3.5V
Rated Operating Currents 400mA
Minimum Operational Current 100mA
Off-State Current <0.5mA
Rated Conditional Short-circuit Current 100 A
Overvoltage Category Type 2
Electromagnetic Compatibility (EMC) Conforms to BS 60947-5-3
To Meet UL Requirements
The device must be connected to a Limited Voltage/Current
Circuit
A 4A fuse must be tted to the device power supply
RFID Sensor Data (as dened in EN 60947-5-2)
Coding Type (as per BS EN ISO 14119) High
Safety Output Timing Data
Safety Response Time <200ms
Safety Input Low to Safety Output Low <25ms
Gate Open to Safety Output Low (SOG) <200ms
Unit unlocked to Safety Output Low <200ms
I/O Current Draw and Limits
Safety Outputs 50mA Limit Each
Monitor 200mA Limit
Solenoid Drive 3.5mA Draw
Safety Inputs 3.5mA Draw Each

Operating Instructions: ATOM
Wiring and Connection Information
Wiring and Connection Information
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SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 24V
PIN 2 OUTPUT 1
PIN 3 0V
PIN 4 OUTPUT 2
PIN 5 SOLENOID DRIVE
SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 INPUT 2
PIN 2 24V
PIN 3 OUTPUT 1
PIN 4 OUTPUT 2
PIN 5 MONITOR
PIN 6 INPUT 1
PIN 7 0V
PIN 8 SOLENOID DRIVE
A B C D E F G H I J K L
1
2
3
4
5
6
7
8
9
A3 FINISH: UNSPECIFIED GENERAL TOLERANCE: 0.1 / 0.5 SHEET: 1 OF 2
ORIGINAL SIZE MATERIAL: UNSPECIFIED CHECKED BY: Rob Johnson
REMOVE ALL SHARP EDGES,
BURRS AND FLASH PART NO: T04098 DRAWN BY: Stuart Lumsden
DO NOT SCALE. IF IN DOUBT ASK!
ALL DIMENSIONS ARE IN mm (UOS) DWG NO: T04098_ATOM_PIN_OUT_INFO DATE: 17-03-22
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT OUR SPECIFIC, WRITTEN APPROVAL. ATOM CONNECTOR PIN OUT INFORMATION RELEASE LEVEL: Approved for Production
TITLE: SCALE: 2.00 ISSUE: 0-A
ATOM CONNECTOR POSITIONS
4
5
3
1
2
SINGLE 5 PIN M12 CONNECTOR
ATM-100A1-A
ATM-110A1-A
ATM-610A1-A
ATM-100A1-A-ER1
CONNECTOR 1
M12 MALE THREADED
5
4
3
1
2
6
7
8
SINGLE 8 PIN M12 CONNECTOR
ATM-100A3-A
ATM-110A3-A
ATM-610A3-A
ATM-100A3-A-ER1
CONNECTOR 1
M12 MALE THREADED
INDICATOR LED.
M12 CONNECTOR
POSITION 1
AUXILIARY RELEASE /
SOLENOID OVERIDE.
(IF FITTED).
M12 CONNECTOR
POSITION 2
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SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 24V
PIN 2 OUTPUT 1
PIN 3 0V
PIN 4 OUTPUT 2
PIN 5 SOLENOID DRIVE
SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 INPUT 2
PIN 2 24V
PIN 3 OUTPUT 1
PIN 4 OUTPUT 2
PIN 5 MONITOR
PIN 6 INPUT 1
PIN 7 0V
PIN 8 SOLENOID DRIVE
A B C D E F G H I J K L
1
2
3
4
5
6
7
8
9
A3 FINISH: UNSPECIFIED GENERAL TOLERANCE: 0.1 / 0.5 SHEET: 1 OF 2
ORIGINAL SIZE MATERIAL: UNSPECIFIED CHECKED BY: Rob Johnson
REMOVE ALL SHARP EDGES,
BURRS AND FLASH PART NO: T04098 DRAWN BY: Stuart Lumsden
DO NOT SCALE. IF IN DOUBT ASK!
ALL DIMENSIONS ARE IN mm (UOS) DWG NO: T04098_ATOM_PIN_OUT_INFO DATE: 17-03-22
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT OUR SPECIFIC, WRITTEN APPROVAL. ATOM CONNECTOR PIN OUT INFORMATION RELEASE LEVEL: Approved for Production
TITLE: SCALE: 2.00 ISSUE: 0-A
ATOM CONNECTOR POSITIONS
4
5
3
1
2
SINGLE 5 PIN M12 CONNECTOR
ATM-100A1-A
ATM-110A1-A
ATM-610A1-A
ATM-100A1-A-ER1
CONNECTOR 1
M12 MALE THREADED
5
4
3
1
2
6
7
8
SINGLE 8 PIN M12 CONNECTOR
ATM-100A3-A
ATM-110A3-A
ATM-610A3-A
ATM-100A3-A-ER1
CONNECTOR 1
M12 MALE THREADED
INDICATOR LED.
M12 CONNECTOR
POSITION 1
AUXILIARY RELEASE /
SOLENOID OVERIDE.
(IF FITTED).
M12 CONNECTOR
POSITION 2
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SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 24V
PIN 2 OUTPUT 1
PIN 3 0V
PIN 4 OUTPUT 2
PIN 5 SOLENOID DRIVE
SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 INPUT 2
PIN 2 24V
PIN 3 OUTPUT 1
PIN 4 OUTPUT 2
PIN 5 MONITOR
PIN 6 INPUT 1
PIN 7 0V
PIN 8 SOLENOID DRIVE
A B C D E F G H I J K L
1
2
3
4
5
6
7
8
9
A3 FINISH: UNSPECIFIED GENERAL TOLERANCE: 0.1 / 0.5 SHEET: 1 OF 2
ORIGINAL SIZE MATERIAL: UNSPECIFIED CHECKED BY: Rob Johnson
REMOVE ALL SHARP EDGES,
BURRS AND FLASH PART NO: T04098 DRAWN BY: Stuart Lumsden
DO NOT SCALE. IF IN DOUBT ASK!
ALL DIMENSIONS ARE IN mm (UOS) DWG NO: T04098_ATOM_PIN_OUT_INFO DATE: 17-03-22
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT OUR SPECIFIC, WRITTEN APPROVAL. ATOM CONNECTOR PIN OUT INFORMATION RELEASE LEVEL: Approved for Production
TITLE: SCALE: 2.00 ISSUE: 0-A
ATOM CONNECTOR POSITIONS
4
5
3
1
2
SINGLE 5 PIN M12 CONNECTOR
ATM-100A1-A
ATM-110A1-A
ATM-610A1-A
ATM-100A1-A-ER1
CONNECTOR 1
M12 MALE THREADED
5
4
3
1
2
6
7
8
SINGLE 8 PIN M12 CONNECTOR
ATM-100A3-A
ATM-110A3-A
ATM-610A3-A
ATM-100A3-A-ER1
CONNECTOR 1
M12 MALE THREADED
INDICATOR LED.
M12 CONNECTOR
POSITION 1
AUXILIARY RELEASE /
SOLENOID OVERIDE.
(IF FITTED).
M12 CONNECTOR
POSITION 2
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SIGNAL SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 24V
CONNECTOR 2
M12 FEMALE
PIN 1 24V
PIN 2 OUTPUT 1 PIN 2 INPUT 1
PIN 3 0V PIN 3 0V
PIN 4 OUTPUT 2 PIN 4 INPUT 2
PIN 5 SOLENOID DRIVE PIN 5 SOLENOID DRIVE
SIGNAL SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 24V
CONNECTOR 2
M12 MALE
PIN 1
PIN 2 OUTPUT 1 PIN 2
PIN 3 0V PIN 3 0V
PIN 4 OUTPUT 2 PIN 4 SOLENOID DRIVE
PIN 5 PIN 5
A B C D E F G H I J K L
1
2
3
4
5
6
7
8
9
A3 FINISH: UNSPECIFIED GENERAL TOLERANCE: 0.1 / 0.5 SHEET: 2 OF 2
ORIGINAL SIZE MATERIAL: UNSPECIFIED CHECKED BY: Rob Johnson
REMOVE ALL SHARP EDGES,
BURRS AND FLASH PART NO: T04098 DRAWN BY: Stuart Lumsden
DO NOT SCALE. IF IN DOUBT ASK!
ALL DIMENSIONS ARE IN mm (UOS) DWG NO: T04098_ATOM_PIN_OUT_INFO DATE: 17-03-22
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT OUR SPECIFIC, WRITTEN APPROVAL. ATOM CONNECTOR PIN OUT INFORMATION RELEASE LEVEL: Approved for Production
TITLE: SCALE: 2.00 ISSUE: 0-A
DOUBLE 5 PIN M12 CONNECTOR
IN 'DAISY-CHAIN' CONFIGURATION
ATM-100A2-A
ATM-110A2-A
ATM-610A2-A
ATM-100A2-A-ER1
4
5
3
1
2
4
3
1
2
5
CONNECTOR 2
M12 FEMALE THREADED
CONNECTOR 1
M12 MALE THREADED
DOUBLE 5 PIN M12 CONNECTOR
ATM-100A4-A
ATM-110A4-A
ATM-610A4-A
ATM-100A4-A-ER1
4
5
3
1
2
3
4
2
1
5
CONNECTOR 2
M12 MALE THREADED
CONNECTOR 1
M12 MALE THREADED
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SIGNAL SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 24V
CONNECTOR 2
M12 FEMALE
PIN 1 24V
PIN 2 OUTPUT 1 PIN 2 INPUT 1
PIN 3 0V PIN 3 0V
PIN 4 OUTPUT 2 PIN 4 INPUT 2
PIN 5 SOLENOID DRIVE PIN 5 SOLENOID DRIVE
SIGNAL SIGNAL
CONNECTOR 1
M12 MALE
PIN 1 24V
CONNECTOR 2
M12 MALE
PIN 1
PIN 2 OUTPUT 1 PIN 2
PIN 3 0V PIN 3 0V
PIN 4 OUTPUT 2 PIN 4 SOLENOID DRIVE
PIN 5 PIN 5
A B C D E F G H I J K L
1
2
3
4
5
6
7
8
9
A3 FINISH: UNSPECIFIED GENERAL TOLERANCE: 0.1 / 0.5 SHEET: 2 OF 2
ORIGINAL SIZE MATERIAL: UNSPECIFIED CHECKED BY: Rob Johnson
REMOVE ALL SHARP EDGES,
BURRS AND FLASH PART NO: T04098 DRAWN BY: Stuart Lumsden
DO NOT SCALE. IF IN DOUBT ASK!
ALL DIMENSIONS ARE IN mm (UOS) DWG NO: T04098_ATOM_PIN_OUT_INFO DATE: 17-03-22
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT OUR SPECIFIC, WRITTEN APPROVAL. ATOM CONNECTOR PIN OUT INFORMATION RELEASE LEVEL: Approved for Production
TITLE: SCALE: 2.00 ISSUE: 0-A
DOUBLE 5 PIN M12 CONNECTOR
IN 'DAISY-CHAIN' CONFIGURATION
ATM-100A2-A
ATM-110A2-A
ATM-610A2-A
ATM-100A2-A-ER1
4
5
3
1
2
4
3
1
2
5
CONNECTOR 2
M12 FEMALE THREADED
CONNECTOR 1
M12 MALE THREADED
DOUBLE 5 PIN M12 CONNECTOR
ATM-100A4-A
ATM-110A4-A
ATM-610A4-A
ATM-100A4-A-ER1
4
5
3
1
2
3
4
2
1
5
CONNECTOR 2
M12 MALE THREADED
CONNECTOR 1
M12 MALE THREADED
4

Operating Instructions: ATOM
Two Safety Outputs Two Safety Inputs
Dual channel OSSD outputs with “low” voltage to indicate the
safe state.
Must be connected to the next OSSD Device or an external
evaluation device.
The External Evaluation Device must:
• Monitor both signals are high before it can leave its safe
state
• Monitor that both signals are synchronous
• Have a Diagnostic Coverage of at least 99%
Dual channel safety inputs with “low” voltage to indicate the
safe state
Must be connected to the previous OSSD device or 24V
A fault will be detected if the inputs are not synchronous (see
timing fault diagram). A full input cycle is needed to clear the
fault.
Solenoid Drive Input Monitor Output
Solenoid Drive input with “high” voltage to activate the
solenoid.
For Power-to-release (unlock) (PTU) devices the solenoid will
unlock the device.
For Power-to-lock (PTL) devices the solenoid will lock the
device.
For Safety-on-Guard-Locking (SOGL) devices the input must
be driven from a safe and monitored source to be able to
achieve PLe.
Control output with “high” voltage to indicate active condition
For Safety-on-Guard-Locking (SOGL) devices the monitor is
activated when the gate is opened.
For Safety-on-Guard (SOG) devices the monitors is activated
when the device is unlocked.
Daisy Chain information
The number of devices that can be wired in series depends on two main criteria:
1. Power line voltage drop
2. Total Safety Response Time
Voltage Drop Safety Response Time
Each ATOM Device in series draws current and causes a
voltage drop on the power line.
The greater the number of devices + distance, the grater the
voltage drop.
The voltage requirement for ATOM is 24+10%-15%, this
means the voltage must not drop below 20.4V to ensure
correct operation.
A typical application with devices spaced 5m apart, wired with
22 AWG cable would allow for 4 devices in series. For more
detailed calculation please see the Voltage Drop Tool on the
Fortress website.
The maximum number of devices permitted in series is 8.
Each ATOM Device in series will increase the total safety
response time of the line.
The maximum safety response time for one device is 200ms.
The increase response time per additional device is 25ms.
The total response time can be calculated using:
T = 200ms + (n-1)x25ms, where n = the number of ATOM
devices in the line
Safety Input 1
Safety Input 2
a a
Simultaneity fault:
If a > 50ms
Safety Inputs Timing Faults
Wiring Diagram
Voltage Supply Safety Outputs
+24V DC
Solenoid Input
0V
2 7 5 83 4
Safety Inputs
1 6
ATOM 8 Pin M12
Gate（SOGL）
or Locking
（SOG）
Monitor
5

Operating Instructions: ATOM
Safety Data
ATOM Product Type
Power-to-
release
(unlock),
Safety-on-
Guard-Locking
Power-to-
release
(unlock),
Safety-on-
Guard
Power-to-Lock,
Safety-on-
Guard
Power-to-
release
(unlock),
Safety-on-
Guard-Locking,
with Escape
Release (ER)
Safety Function 1 Monitor Safety Inputs are High √ √ √ √
Safety Function 2 Monitor door is closed √ √ √ √
Safety Function 3 Keep the door Locked √ √
Safety Function 4
Locking means overridden and
safety contacts opened on
operation of Escape Release
√
Safe State 1 1 OSSD output is low √ √ √ √
Safe State 2 Door is Locked √ √
Performance Level (ISO 13849-1:2015) Up to PLe
Category (ISO 13849-1:2015) Up to Cat.4
SIL (according to IEC 62061) Up to SIL CL3
Diagnostic Coverage A maximum DC of 99% can be achieved with suitable monitoring.
PFH 4.16x10-9
Device Type (according to ISO 14119) Type 2 Type 4 with Lock
Demand mode (according to 62061) High
Applicable Standards ISO 14119, ISO 13849, IEC 61508, 60947-5-2, BS 62061
Functioning
Power-to-release (unlock) Solenoid Type Closing and Locking
The ATOM Interlocking Device is closed by inserting the Atom Actuator assembly into the upper head portion of the ATOM
Switch assembly (See Fig.1). Once inserted, the internal mechanism then locks the Actuator assembly into the ATOM switch
placing the Device into its Locked-State.
Unlocking
The Device is unlocked when voltage is applied to the Solenoid Drive pin.
Opening
Once unlocked, the ATOM Actuator assembly can be removed from the ATOM Switch assembly.
Auxiliary Release Function
In the event of power failure, the ATOM Interlocking Device can be released and unlocked using the supplied Auxiliary
Release Driver Bit irrespective of the state of the solenoid.
- Use the Auxiliary Release Driver Bit (with an appropriate Screwdriver) to drive and rotate the Override Spindle 90°
clockwise. (See Fig.2).
- Remove the ATOM Actuator from the ATOM Switch.
- Rotate the Override Spindle 90˚ anti-clockwise back to its ‘Locked’ position and restore any necessary protection.
Note; Auxiliary Release Driver Bit must be securely controlled during normal operation to prevent misuse.
Escape Release Function
An ATOM Interlocking Device with Escape Release (ER) can be unlocked using the inbuilt Escape Release function.
To unlock and open a locked ATOM Interlocking Device via an Escape Release;
- Operate the Escape Release by pushing onto the Escape Release knob (see Fig.1)
- Open the guarded area by pushing open the now unlocked Gate/Door.
Note, ATOM with Escape Release (ER) is only suitable for hinged style Gate/Doors, and only where no other locking or
latching means is used.
Note, the state of the Safety Outputs will change on the operation of the Escape Release knob not on the opening of the
Gate/Door.
6

Operating Instructions: ATOM
Figure 2: Auxiliary Release Function
Figure 1: Product Images
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FORTRESS
ATOM switch
assembly
ATOM actuator assembly Actuator
entry bore
LED
Indication
M12 cable(s) entry
Manual solenoid override
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MULTI-BIT SCREWDRIVER
AUXILIARY RELEASE DRIVER BIT
OVERRIDE SPINDLE
ACTUATOR LOCKED. ACTUATOR UN-LOCKED AND
FREE TO BE REMOVED.
AUXILIARY RELEASE NOT OPERATED.
ATOM IN LOCKED STATE.
OVERRIDE SPINDLE ROTATED 90 CLOCKWISE.
AUXILIARY RELEASE OPERATED.
ATOM IN UN-LOCKED STATE.
AUXILIARY RELEASE DRIVER BIT
(SUPPLIED WITH PTU UNITS ONLY)
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Auxiliary release not operated.
ATOM in locked state.
Actuator locked.
Override spindle rotated 90° clockwise.
Auxiliary release operated.
ATOM in un-locked state.
Actuator un-locked and
free to be removed.
Multi-bit
screwdriver
Auxiliary release
driver bit
Override spindle
Auxiliary release driver bit (supplied
with PTU units only)
7
Escape release
knob
Escape release
housing
M12 cable(s) entry
Manual solenoid override
To reset and relock an ATOM Interlocking Device after an Escape Release operation;
- First isolate power to the guarded machine to ensure it cannot restart when Safety Outputs go high.
- Pull on Escape Release knob (see Fig.1)
- Close the Gate/Door of the guarded area.
- Test that the Escape Release has been fully reset by checking status of Safety Outputs are low and also checking Gate/
Door of guarded area is sufciently locked and secured.
Power-to-Lock Solenoid Type Closing
The ATOM Interlocking Device is closed by inserting the Atom Actuator assembly into the upper head portion of the ATOM
Switch assembly (See Fig.1). Note, in all Power-to-Lock solenoid type devices the Device will remain in its unlocked-state
until the solenoid is energised.
Locking
The Device is locked when voltage is applied to the Solenoid Drive pin.
Unlocking
The Device is unlocked when voltage is removed from the Solenoid Drive pin.
Opening
Once unlocked, the ATOM Actuator can be removed from the ATOM Switch.
There is no Auxiliary Release function on a Power-to-Lock Solenoid type ATOM Device.
ATOM
ATM-***A*-A
ATOM with Escape Release (ER)
ATM-100A*-A-ER1

Operating Instructions: ATOM
LED Output
ATOM Interlocking Device state is indicated by LED at the base of the device. If a device is in a fault state, a full cycle of the
inputs or power cycle may be required to clear the fault state. If fault state cannot be cleared contact Fortress Technical
Support.
Led
Pattern Status State Cause Troubleshooting
Safety Output State
Safety
on Guard
Locking
(SOGL)
Safety on
Guard
(SOG)
Off Off No power supply Check continuity from
power supply to device Low Low
Green Locked High High
Green / Red Unlocked,
Actuator In Low High
Red Actuator
Out Low Low
Red Flash Overridden Auxiliary release left in
unlocked position
Check that the auxiliary
release has been rotated
fully anti-clockwise
Low High
Green Flash Safety
Inputs Low
Safety Input signal from
previous device low
Check the safety state of
the previous device, or
continuity from the 24V
supply if the rst device in
the chain
Low Low
Amber Unlocking
Fault
Unable to unlock, possibly
due to tension on actuator
Check for any obstruction
of the mechanism.
Press actuator tightly
towards the device to
release any tension
Low High
Amber Flash Safety
Input Fault
Mismatch between two
safety input signals
Conrm continuity from the
previous device on both
safety inputs, then reset
fault by cycling the safe
state of the previous device
Low Low
2 Amber
Flash
Safety
Output
Fault
Short circuit on safety
output signals
Conrm the safety outputs
are not shorted together, or
to any other signal
Low Low
3 Amber
Flash
Wrong
RFID
Actuator
Used
Actuator from another
device used by mistake
Conrm serial number of
actuator matches that of
the device
Low Low
Long Amber
+ Flash
Locking
Fault Device unable to lock
Check for any obstruction
of the mechanism.
Press actuator tightly
towards the device to
release any tension.
Low High
Long Amber
+ 2 Flash
RF Lost
Whilst
Locked
RF signal from actuator
lost whilst in the locked
state
Check that mechanism has
not been rotated without
the actuator – see
instructions on Actuator
Does Not Enter.
Low Low
Long Amber
+ 3 Flash
Under /
Over
Voltage
Insufcient supply voltage
to device.
Measure the supply
voltage at the device is
within specication
Low Low
8

Operating Instructions: ATOM
9
Mounting Instructions
Tools and Fixings Required
4 x M5 Screws for securing ATOM Switch and Actuator.
• Screws must be suitable length for a minimum of 10mm thread engagement.
• Screws must be security type to prevent unauthorised removal or tampering, for example pin-hex or pin-torx anti-tamper
security screws.
• Minimum required screw type and class; 12.9 Grade High Tensile Steel to maintain FZH value.
- Note; F1max value was achieved using four 12.9 Grade High Tensile Steel M5 Cap Head bolts
• Required torque setting; 8-12 Nm.
4 x M5 Nut / T-Nut / Threaded Hole for securing ATOM Switch and Actuator.
Driver suitable for securing M5 xing screws.
Auxiliary Release Driver Bit (provided) to operate Auxiliary Release Function.
1/4” Driver to suit Auxiliary Release Driver Bit.
Adhesive Threadlocker to secure mounting xings from loosening due to vibration. Threadlocker must be ‘middle strength’
or greater.
For units with Escape Release (ER) ONLY – A drill and 30mm hole saw for inserting Escape Release (ER) feature
through the fence post.
Additional Tools required for ATOM with Escape Release (ER) only;
Drill with min. 21mm hole saw for cutting required hole through Gate/Door post for Escape Release housing.
Mechanical Mounting Instructions
1. Locate the ATOM Interlocking Device so that operation of the Auxiliary Release function, Escape Release function (if
applicable), Functional testing, Electrical testing, Scheduled Inspection and Maintenance and nal unit replacement are all
easily possible.
2. Operate the Auxiliary Release function to remove the ATOM Actuator from the ATOM Switch assembly. Note, this step is
not applicable for Power-to-Lock solenoid type devices.
3. For ATOM with Escape Release (ER) only – Remove Escape Release knob (see Fig.1) by unscrewing it anti-clockwise.
4. Prepare the Door/Gate of the guarded area by cutting any required holes or threads following the dimensions of Fig. 4 and
Figures 7-11.
5. For ATOM with Escape Release (ER) only – Drill a minimum 21mm hole in Door/Gate post to allow for Escape Release
housing. See Fig. 10 for required hole location.
• Note; ATOM with Escape Release (ER) suitable for door/gate post thickness up to 56mm. For anything greater than 56mm
an extension kit will be required, please contact Fortress for more information
6. Mount the ATOM Switch and ATOM Actuator assemblies to appropriate parts of the machine or guarding.
• The ATOM Actuator must be correctly aligned and oriented with the ATOM Switch as per the assembly dimensions of Fig.
9 and Fig. 11.
• All mounting surfaces should be at, stable and suitable of providing a minimum of 10mm M5 thread engagement or
sufcient support to either an M5 Nut or M5 T-Nut. See Fig.3 and Fig.4 for some mounting examples.
7. For ATOM with Escape Release (ER) only – Re-attach Escape Release knob (see Fig.1) by screwing it on clockwise.
• Note; the escape release knob must be secured against tampering, removal or loosening using adhesive thread locker.
8. Perform Mechanical Function tests before completing installation and commission. See Mechanical Function test section.
• Note; Lid assembly does not need to be removed during mounting. Removing the lid assembly may foul product IP level.
Mount the complete ATOM Interlocking Device only in the correctly assembled condition.
- The complete machine guarding installation must conform to all relevant design, construction and installation standards and
guidelines.
- Any gap around the perimeter of the machine and guarding when closed and locked (Safety Outputs High) must not exceed
the limits specied in BS 294 & BS 953.
- All xing screws used to mount the Device must be permanently prevented from removal. If mounting xings are visible, they
must be secured against removal by personnel using standard tools, manipulation and un-authorised or un-identiable
removal. If mounting xings are not visible or hidden, they must be secured against removal or loosening due to vibration. In
both cases, a middle strength adhesive threadlocker is required.
- The Device must not be used as a mechanical stop. Where applicable, precautions must be made to ensure the door or
gate of any guarded area has sufcient support and stops to prevent the impact on the Device.

Operating Instructions: ATOM
10
Figure 4: Plates and Guards Mounting Application Example
www.fortressinterlocks.com
Fortress
Interlocks
125
41
M5 THREADED HOLE
MINIMUM DEPTH 10MM
(2 PLACES)
(2 PLACES)
MINIMUM DEPTH 10MM
M5 THREADED HOLE
ATOM actuator
assembly
M5 security xing screw
(min. length 20mm)
M5 security xing
screw (min. length
20mm)
M5 nylon washer
ATOM switch assembly
M12 quick disconnect cable(s)
M5 nylon
washer
M5 security xing screw
(min. length 45mm)
M5 security xing
screw (min. length
45mm)
Figure 3: Extrusion Prole Mounting Application Example
M12 quick disconnect cable(s)
www.fortressinterlocks.com
Fortress
Interlocks
M5 security xing screw
(min. length 20mm)
M5 T-Nut
M5 T-Nut
ATOM actuator assembly
M5 security xing screw (min. length 20mm)
M5 T-Nut
M5 T-Nut
40mm aluminium extrusion
shown for example only
ATOM switch assembly
M5 nylon washer
M5 security xing screw
(min. length 40mm)
M5 nylon washer
M5 security xing screw
(min. length 40mm)

Operating Instructions: ATOM
Figure 6: Hinged Door Application Example
www.fortressinterlocks.com
Fortress
Interlocks
150mm
MINIMUM ACTUATING RADIUS
150mm
MINIMUM ACTUATING RADIUS
ATOM actuator
assembly
ATOM switch
assembly
ATOM switch
assembly
ATOM actuator
assembly
11
Figure 5: ATOM Device with Escape Release Mounting Example
www.fortress-safety.com
FORTRESS
ATOM Escape Release
knob removed while
mounting
Escape Release housing
mounted through gate post
Ø 21mm min. bore to
accept Escape Release
housing
M5 - T-Nut
M5 Nylon Washer
M5 Security Fixing Screws
(min length 40mm)
M5 Nylon Washer
M5 Security Fixing Screws
(min length 40mm)
M5 - T-Nut
Door/Gate post thickness up to 56mm

Operating Instructions: ATOM
12
Electrical Connection Instructions
1. Make sure the electrical supply is isolated and safe before any installation.
2. Insert appropriate M12 Connector cabling into base of ATOM Enclosure assembly.
• Note; suitable connectors and cabling must be used to maintain IP65 and IP67 sealing.
3. Perform Electrical Function tests before completing installation and commission. See Electrical Function test section.
- Ensure that all circuits connected to the ATOM Interlocking Device are derived from a Safety Extra Low Voltage or Protected
Extra Low Voltage power supply (SELV or PELV).
- Ensure the electrical connection and installation of the ATOM Device and complete guarding application is performed
according to all relevant local standards and guidelines.
• Note; Lid assembly does not need to be removed during electrical installation. Removing the lid assembly may foul
product IP level.
Mechanical Function Test (Unpowered)
Power-to-release (unlock) ATOM Interlocking Devices
1. Insert the ATOM Actuator into the ATOM Switch.
• It must lock into position.
2. Operate the Auxiliary Release Function and remove the ATOM Actuator from the ATOM Switch.
3. Return the Override Spindle to its Locked position (See g.2) and reinsert the ATOM Actuator into the ATOM Switch.
• It must lock into position.
4. Press the Escape Release (ER) knob and remove the actuator, re-insert actuator and reset Escape Release (ER) knob, the
actuator should be locked in position.
Power-to-release (unlock) ATOM Interlocking Devices with Escape Release (ER)
Follow steps 1 to 3 above.
4. Push the Escape Release knob (see g.1) and remove the ATOM Actuator from the ATOM Switch.
5. Pull on Escape Release knob to reset Escape Release.
6. Reinsert the ATOM Actuator into the ATOM Switch.
• It must lock into position.
Power-to-Lock ATOM Interlocking Devices
1. Insert the ATOM Actuator into the ATOM Switch.
• It must not lock into position.
Electrical Function Test (Powered)
1. Close the guard, ensure the ATOM Device is in its Locked-State and start the machine.
• It must not be possible to open the guard!
• The Safety Outputs should be High.
2. Switch off the machine, unlock the ATOM Device and open the guard.
• The machine must not start when the guard is open!
• The Safety Outputs should be Low.
3. Close the guard, ensure the ATOM Device is in its Locked-State so the machine could start.
• It must not be possible to open the guard!
• Press the Escape Release (ER) knob.
• Check the Safety Output signal is now low.
• Open the guard and reset the Escape Release (ER) knob and then close the guard.
• The guard must now be locked again.
Additional test for Power-to-release (unlock) ATOM Interlocking Devices with Escape Release (ER);
4. Push the Escape Release knob (see g.1)
• The guarded machine must not start when the Escape Release is operated.
• The Safety Outputs should be Low (note, the state of the Safety Outputs will change on the operation of the Escape
Release knob not on the opening of the Gate/Door).
5. Open the guard, reset the Escape Release by pulling on Escape Release knob and re-close the guard.
• The Safety Outputs should be High.
• It must not be possible to open the guarded area.
Warning: This Device does not contain the Machine Reset or Restart facility after an escape or auxiliary release of
the guard locking. Additional measures are required to achieve the reset of the machine system.

Operating Instructions: ATOM
Maintenance and Inspection
Regular inspection of the following is necessary to ensure trouble-free, lasting operation:
- Secure mounting of components. (See Mechanical Mounting Instructions).
- Debris and wear.
If used on an infrequent basis, the complete Interlocking system must be functionally tested at least once every
month. See Mechanical and Electrical Function tests listed above for test requirements.
WD40 lubricant, or equivalent, should be applied to the Head Portion of the ATOM Switch assembly every 10,000 operations.
There are no user serviceable parts in this product. If any damage or wear is found with a device, please contact your local
Fortress stockist.
The complete ATOM Interlocking Device must be replaced after 1 million switching operations.
For ATOM Interlocking Device with Escape Release (ER), regular proof testing of the escape release function (minimum once
per year) is crucial. See Mechanical Function Testing and Electrical Testing sections for details.
Disposal
The ATOM Interlock Device does not contain any certied hazardous materials so should be disposed of as industrial waste.
Liability Coverage is Voided Under the Following Conditions:
1. If these instructions are not followed.
2. Non-compliance with safety regulations.
3. Installation and electrical connection not performed by authorised personnel.
4. Non-implementation of functional checks.
13
Actuator Does Not Enter Head - Correcting A Rolled Mechanism
In some scenarios such as cleaning or high vibration, the ATOM Interlocking Device can have the closing mechanism of the
Switch Body mechanically operated without inserting the Actuator. Note, if this happens The ATOM Actuator assembly will be
blocked from entering the ATOM Switch Body and the Device will fault as the correct RFID actuator is not present.
To mechanically reset the Device if the head has been left in its closed position;
1. Place the Device into its Unlocked state.
- For Power-to-release (unlock) Devices use the Auxiliary Release function as described in the Functioning section of this
document.
2. Engage a at bladed screwdriver into the slot in the head mechanism of the ATOM Switch Body and push downwards to
rotate the head to its forward position. The head is now repositioned to allow for entry of the ATOM Actuator assembly.
3. Return the Device to its main operating state.
- For Power-to-release (unlock) Devices ensure the Auxiliary Release function has been reset to the ‘locked’ position. See
Functioning section for details.

Operating Instructions: ATOM
14
Figure 8: Dimensional Drawing - ATOM Actuator only
FORTRESS
A company
Halma
www.fortress-safety.com
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT SPECIFIC, WRITTEN APPROVAL.
ALL DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 0.75 SHEET: 2 OF 3
ORIGINAL SIZE DATE: 28-02-22 ISSUE: 0
NCGARD - ATOM ER DIMENSIONAL SALES DRAWING DWG NO: SD-00051
Figure 7: Dimensional Drawing - ATOM Switch Body only
40
138.25
13.8
36
16.62
5
125
21.5
5.2 THRU ALL.
(2 PLACES)
5.2 THRU ALL.
(2 PLACES) 33.3
20
5
125
32
16.5
67.33
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT SPECIFIC, WRITTEN APPROVAL.
ALL DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SHEET: 1 OF 3
ORIGINAL SIZE SCALE: 0.50
NCGARD - ATOM DIMENSIONAL SALES DRAWING
DATE: 18-01-19
ISSUE: 0-A
DWG NO: SD-00001
M12 THREADED
CONNECTOR(S)
Protection Against Environmental Inuences
In order to maintain full mechanical and electrical performance, the Device must be protected against the ingress of all foreign
bodies such as swarf, sand, blasting shot etc.
The Device is not suited for use in corrosive environments.
The Device is only suitable for dusty environments where careful consideration has been given to environment requirements,
product selection and mounting positions. Contact your local Fortress stockist for guidance and details.
Where possible the Device must be mounted away from the guarded machine or by the use of anti-vibration mountings in
order to avoid the effects of vibration, shock and bump.
The manufacturer reserves the right to modify the design at any time and without notice.
This guide should be retained for future reference.

Operating Instructions: ATOM
15
Figure 10: Dimensional Drawing - ATOM Switch Body with Escape Release only
FORTRESS
A company
Halma
www.fortress-safety.com
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT SPECIFIC, WRITTEN APPROVAL.
ALL DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 0.50 SHEET: 1 OF 3
ORIGINAL SIZE DATE: 28-02-22 ISSUE: 0
NCGARD - ATOM ER DIMENSIONAL SALES DRAWING DWG NO: SD-00051
Figure 9: Dimensional Drawing - ATOM Interlocking Device
6
+7 -7
138.25
13.8
72.5
32
16
6.75
41
5.5 THRU ALL
(2 PLACES)
33.2 36
125
5
5
125
20 16.6
5.2 THRU ALL
(2 PLACES)
5.2 THRU ALL
(2 PLACES)
40
(WHEN CENTRALLY ALIGNED)
-60
15
0
+7
-7
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT SPECIFIC, WRITTEN APPROVAL.
ALL DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SHEET: 3 OF 3
ORIGINAL SIZE SCALE: 0.75
NCGARD - ATOM DIMENSIONAL SALES DRAWING
DATE: 18-01-19
ISSUE: 0-A
DWG NO: SD-00001

Fortress Interlocks Ltd, 2 Inverclyde Drive, Wolverhampton, WV4 6FB, United Kingdom, Tel: [phone], Web: www.fortress-safety.com April 2022 - v2.0
ATOM Accessories
16
Description
Brackets for simplied mounting.
ATM-KB
ATM-KH ATM-KS
ATM-KC
ATM-KL
ATOM Brackets Options
Part No. Description
ATM-KB Slide angled bracket for sliding gates (not compatible for ATOM with Escape Release (ER))
ATM-KC Angled bracket(s) for hinged gates
ATM-KL With handle for sliding gates (not compatible for ATOM with Escape Release (ER))
ATM-KH With handle for hinged gates
ATM-KS Slidebar-style retractable actuator (not compatible for ATOM with Escape Release (ER))
ATOM Cordset
Part No. Cable Length Description
CABLE-2M-AT1 2m
To suit 5 Pin M12 connectors.CABLE-5M-AT1 5m
CABLE-10M-AT1 10m
CABLE-2M-AT3 2m
To suit 8 Pin M12 connectors.CABLE-5M-AT3 5m
CABLE-10M-AT3 10m
CABLE-2M-ATD 2m
To suit X 5 Pin M12 daisy chain connectors.CABLE-5M-ATD 5m
CABLE-10M-ATD 10m
ATOM Shorting Plug
Part No. Description
SHORTING-PLUG-ATD To terminate last ATOM Device at end of daisy chain.
FORTRESS
A company
Halma
www.fortress-safety.com
THE COPYRIGHT OF THIS DRAWING BELONGS TO FORTRESS INTERLOCKS Ltd.
THE CONTENT OF THIS DRAWING IS CONFIDENTIAL AND MUST NOT BE
DISCLOSED TO ANY 3rd PARTY WITHOUT SPECIFIC, WRITTEN APPROVAL.
ALL DIMENSIONS
ARE IN mm UNLESS
OTHERWISE STATED A3 SCALE: 0.50 SHEET: 3 OF 3
ORIGINAL SIZE DATE: 28-02-22 ISSUE: 0
NCGARD - ATOM ER DIMENSIONAL SALES DRAWING DWG NO: SD-00051
Figure 11: Dimensional Drawing - ATOM Interlocking Device with Escape Release (ER)