The ABB Bailey INTKM01 is an INFI 90 Time Keeper Master Module designed for time synchronization in Sequence of Events systems.
The module provides the master timing reference for the SOE architecture. It distributes synchronized timing information to connected time-keeper modules and exchanges absolute time data through the I/O Expander Bus.
The INTKM01 uses three card-edge connectors identified as P1, P2, and P3. P1 provides module power and receives the power-fail interrupt. P2 connects the module to the I/O Expander Bus. P3 handles time synchronization signals and receives IRIG-B timing information from the NTST01 termination unit.
The photographed module is marked INTKM01 TIME KEEPER MASTER, +5Vdc 2W MAX, E96-631, and GM9008200251.
Connections / Interfaces
The INTKM01 uses three card-edge connectors:
Connector
Function
P1
Module power and power-fail interrupt
P2
I/O Expander Bus
P3
Time synchronization and IRIG-B interface
P1 Power Connector
Pin
Function
1
+5 VDC
2
+5 VDC
3
NC
4
NC
5
GND (5 VDC)
6
GND (5 VDC)
7
NC
8
NC
9
PFI
10
NC
11
NC
12
NC
PFI is the power-fail interrupt signal received from the power supply unit.
P2 I/O Expander Bus
Pin
Function
1
Data bit 1
2
Data bit 0
3
Data bit 3
4
Data bit 2
5
Data bit 5
6
Data bit 4
7
Data bit 7
8
Data bit 6
9
Bus clock
10
Sync
11
NC
12
NC
P2 provides the module interface to the INFI 90 I/O Expander Bus for data transfer and synchronization.
P3 Time Signals I/O
Pin
Function
1
NC
2
NC
3
NC
4
NC
5
NC
6
NC
7
IRIG B+
8
Reserved
9
Reserved
10
Rx presence NTST01+
11
Reserved
12
Tx sync time information+
13
Reserved
14
NC
15
GND
A
NC
B
NC
C
NC
D
NC
E
NC
F
NC
H
IRIG B-
J
Reserved
K
Reserved
L
Rx presence NTST01-
M
Reserved
N
Tx sync time information-
P
Reserved
R
NC
S
NC
Signal Functions
Signal
Function
IRIG B+ / IRIG B-
Differential IRIG-B time reference input
Rx presence NTST01+ / -
Detects the NTST01 timing receiver interface
Tx sync time information+ / -
Differential synchronized time output
PFI
Power-fail interrupt
Bus Clock
I/O Expander Bus clock
Sync
I/O Expander Bus synchronization
Features
INFI 90 Time Keeper Master Module
Master time synchronization for Sequence of Events systems
IRIG-B external time reference capability
Internal clock synchronization and correction
Time-sync distribution to IMSET01 modules
Communication through NTST01 termination hardware
Absolute time interface to the INSEM01 Sequence of Events Master
RS-485 time synchronization output
Internal timing operation when the external receiver is unavailable
Two-color module status indication
Diagnostic operating mode
Exact hardware marking INTKM01
Nameplate power marking +5Vdc, 2 W maximum
Applications
INFI 90 Sequence of Events systems
Distributed event time synchronization
Plant event chronology
SOE timestamp coordination
Master clock distribution
Legacy Bailey control-system maintenance
Replacement of installed INTKM01 Time Keeper Master modules
Technical Specifications
General
Parameter
Specification
Manufacturer
ABB Bailey
Exact Model
INTKM01
Product Type
Time Keeper Master Module
System Family
INFI 90
Primary Function
Sequence of Events time synchronization
Associated SOE Master
INSEM01
Associated Time Keeper Module
IMSET01
Associated Termination Unit
NTST01
Nameplate Identification
INTKM01 TIME KEEPER MASTER
Additional Nameplate Marking
E96-631
Hardware / Unit Marking
GM9008200251
Power
Parameter
Specification
Nameplate Supply
+5 VDC
Nameplate Power
2 W maximum
Timing and Synchronization
Parameter
Specification
External Time Input
IRIG-B
IRIG-B Format
DC level shift
IRIG-B Interface
Through NTST01
Time-Sync Output
RS-485
Time-Sync Data Rate
62.6 kbaud
Synchronization Resolution
+/-10 microseconds
Absolute Time Resolution to INSEM01
+/-1 ms
Internal Oscillator Frequency
10 MHz
Oscillator Stability
+/-1 ppm
Oscillator Aging
1 ppm/year
Internal Architecture
Parameter
Specification
Processor
DSP 2101
CPU Architecture
16-bit
CPU Frequency
10 MHz
Instruction Cycle
100 ns
Timer
16-bit interval timer with prescaler
Serial Port
1 bidirectional synchronous serial port
Boot EPROM
64 kbyte
RAM
16 kword
FIFO
512 byte
Program Memory RAM
1 kword
Data Memory RAM
512 word
System Interfaces
Interface
Function
IRIG-B
Receives external reference time through NTST01
Time-Sync Link
Distributes synchronized time to IMSET01 modules
I/O Expander Bus
Transfers absolute time to INSEM01
RS-485
Time synchronization link to downstream SOE modules
NTST01
Termination and timing signal interface
Time Synchronization Operation
The INTKM01 receives time information from the NTST01 through the IRIG-B interface.
When a valid external time receiver is present, the module periodically adjusts its internal clock against that reference.
The module provides absolute time to the INSEM01 through the I/O expander bus. It also distributes synchronized timing to IMSET01 modules through the time-sync link.
If the external receiver is lost, the INTKM01 continues generating time using its internal quartz timing reference.
Installation & Commissioning
Verify the module is identified as INTKM01 before replacement.
Record the existing P1, P2, and P3 connector orientation before removal.
Confirm +5 VDC power and ground connections through P1.
Verify the PFI signal path from the associated power supply.
Inspect P2 I/O Expander Bus connections before installation.
Confirm IRIG-B polarity at P3 where an external time reference is installed.
Verify NTST01 presence signaling after startup.
Confirm synchronized time transmission to downstream SOE equipment.
Observe ESD handling precautions when removing or installing the module.
Replacement Notes
Match the exact INTKM01 Time Keeper Master Module identification.
Do not confuse P1, P2, and P3 because each connector serves a different system function.
Preserve IRIG-B polarity and synchronization wiring during replacement.
Confirm the NTST01 and I/O Expander Bus connections before returning the SOE system to service.
Shipping & Returns
Global Express Shipping
Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.
Returns & Warranty
30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.
FAQ
What is the ABB Bailey INTKM01 used for?
The ABB Bailey INTKM01 is the Time Keeper Master Module for INFI 90 Sequence of Events systems. It maintains and distributes synchronized timing to the SOE architecture.
Does the ABB Bailey INTKM01 support IRIG-B synchronization?
The ABB Bailey INTKM01 accepts IRIG-B time code in DC level-shift format through an NTST01 termination unit and uses this reference to correct its internal clock.
How does INTKM01 communicate with IMSET01 modules?
The ABB Bailey INTKM01 distributes time information to IMSET01 modules through an RS-485 time-sync link operating at 62.6 kbaud via NTST01 termination hardware.
What happens if the external time receiver is lost?
The ABB Bailey INTKM01 continues operating from its internal timing reference when the external receiver is unavailable. External synchronization normally improves the accuracy of the internal clock.
What is the difference between INTKM01 and IMSET01?
The ABB Bailey INTKM01 is the Time Keeper Master, while IMSET01 modules receive and use synchronized timing within the Sequence of Events system.
What should be checked before replacing an INTKM01 module?
The ABB Bailey INTKM01 replacement should match the exact module identification, NTST01 termination arrangement, IRIG-B reference connection, SOE topology, and associated INSEM01 and IMSET01 configuration.
The ABB Bailey INTKM01 is an INFI 90 Time Keeper Master Module designed for time synchronization in Sequence of Events systems.
The module provides the master timing reference for the SOE architecture. It distributes synchronized timing information to connected time-keeper modules and exchanges absolute time data through the I/O Expander Bus.
The INTKM01 uses three card-edge connectors identified as P1, P2, and P3. P1 provides module power and receives the power-fail interrupt. P2 connects the module to the I/O Expander Bus. P3 handles time synchronization signals and receives IRIG-B timing information from the NTST01 termination unit.
The photographed module is marked INTKM01 TIME KEEPER MASTER, +5Vdc 2W MAX, E96-631, and GM9008200251.
Connections / Interfaces
The INTKM01 uses three card-edge connectors:
Connector
Function
P1
Module power and power-fail interrupt
P2
I/O Expander Bus
P3
Time synchronization and IRIG-B interface
P1 Power Connector
Pin
Function
1
+5 VDC
2
+5 VDC
3
NC
4
NC
5
GND (5 VDC)
6
GND (5 VDC)
7
NC
8
NC
9
PFI
10
NC
11
NC
12
NC
PFI is the power-fail interrupt signal received from the power supply unit.
P2 I/O Expander Bus
Pin
Function
1
Data bit 1
2
Data bit 0
3
Data bit 3
4
Data bit 2
5
Data bit 5
6
Data bit 4
7
Data bit 7
8
Data bit 6
9
Bus clock
10
Sync
11
NC
12
NC
P2 provides the module interface to the INFI 90 I/O Expander Bus for data transfer and synchronization.
P3 Time Signals I/O
Pin
Function
1
NC
2
NC
3
NC
4
NC
5
NC
6
NC
7
IRIG B+
8
Reserved
9
Reserved
10
Rx presence NTST01+
11
Reserved
12
Tx sync time information+
13
Reserved
14
NC
15
GND
A
NC
B
NC
C
NC
D
NC
E
NC
F
NC
H
IRIG B-
J
Reserved
K
Reserved
L
Rx presence NTST01-
M
Reserved
N
Tx sync time information-
P
Reserved
R
NC
S
NC
Signal Functions
Signal
Function
IRIG B+ / IRIG B-
Differential IRIG-B time reference input
Rx presence NTST01+ / -
Detects the NTST01 timing receiver interface
Tx sync time information+ / -
Differential synchronized time output
PFI
Power-fail interrupt
Bus Clock
I/O Expander Bus clock
Sync
I/O Expander Bus synchronization
Features
INFI 90 Time Keeper Master Module
Master time synchronization for Sequence of Events systems
IRIG-B external time reference capability
Internal clock synchronization and correction
Time-sync distribution to IMSET01 modules
Communication through NTST01 termination hardware
Absolute time interface to the INSEM01 Sequence of Events Master
RS-485 time synchronization output
Internal timing operation when the external receiver is unavailable
Two-color module status indication
Diagnostic operating mode
Exact hardware marking INTKM01
Nameplate power marking +5Vdc, 2 W maximum
Applications
INFI 90 Sequence of Events systems
Distributed event time synchronization
Plant event chronology
SOE timestamp coordination
Master clock distribution
Legacy Bailey control-system maintenance
Replacement of installed INTKM01 Time Keeper Master modules
Technical Specifications
General
Parameter
Specification
Manufacturer
ABB Bailey
Exact Model
INTKM01
Product Type
Time Keeper Master Module
System Family
INFI 90
Primary Function
Sequence of Events time synchronization
Associated SOE Master
INSEM01
Associated Time Keeper Module
IMSET01
Associated Termination Unit
NTST01
Nameplate Identification
INTKM01 TIME KEEPER MASTER
Additional Nameplate Marking
E96-631
Hardware / Unit Marking
GM9008200251
Power
Parameter
Specification
Nameplate Supply
+5 VDC
Nameplate Power
2 W maximum
Timing and Synchronization
Parameter
Specification
External Time Input
IRIG-B
IRIG-B Format
DC level shift
IRIG-B Interface
Through NTST01
Time-Sync Output
RS-485
Time-Sync Data Rate
62.6 kbaud
Synchronization Resolution
+/-10 microseconds
Absolute Time Resolution to INSEM01
+/-1 ms
Internal Oscillator Frequency
10 MHz
Oscillator Stability
+/-1 ppm
Oscillator Aging
1 ppm/year
Internal Architecture
Parameter
Specification
Processor
DSP 2101
CPU Architecture
16-bit
CPU Frequency
10 MHz
Instruction Cycle
100 ns
Timer
16-bit interval timer with prescaler
Serial Port
1 bidirectional synchronous serial port
Boot EPROM
64 kbyte
RAM
16 kword
FIFO
512 byte
Program Memory RAM
1 kword
Data Memory RAM
512 word
System Interfaces
Interface
Function
IRIG-B
Receives external reference time through NTST01
Time-Sync Link
Distributes synchronized time to IMSET01 modules
I/O Expander Bus
Transfers absolute time to INSEM01
RS-485
Time synchronization link to downstream SOE modules
NTST01
Termination and timing signal interface
Time Synchronization Operation
The INTKM01 receives time information from the NTST01 through the IRIG-B interface.
When a valid external time receiver is present, the module periodically adjusts its internal clock against that reference.
The module provides absolute time to the INSEM01 through the I/O expander bus. It also distributes synchronized timing to IMSET01 modules through the time-sync link.
If the external receiver is lost, the INTKM01 continues generating time using its internal quartz timing reference.
Installation & Commissioning
Verify the module is identified as INTKM01 before replacement.
Record the existing P1, P2, and P3 connector orientation before removal.
Confirm +5 VDC power and ground connections through P1.
Verify the PFI signal path from the associated power supply.
Inspect P2 I/O Expander Bus connections before installation.
Confirm IRIG-B polarity at P3 where an external time reference is installed.
Verify NTST01 presence signaling after startup.
Confirm synchronized time transmission to downstream SOE equipment.
Observe ESD handling precautions when removing or installing the module.
Replacement Notes
Match the exact INTKM01 Time Keeper Master Module identification.
Do not confuse P1, P2, and P3 because each connector serves a different system function.
Preserve IRIG-B polarity and synchronization wiring during replacement.
Confirm the NTST01 and I/O Expander Bus connections before returning the SOE system to service.
The ABB Bailey INTKM01 is the Time Keeper Master Module for INFI 90 Sequence of Events systems. It maintains and distributes synchronized timing to the SOE architecture.
Does the ABB Bailey INTKM01 support IRIG-B synchronization?
The ABB Bailey INTKM01 accepts IRIG-B time code in DC level-shift format through an NTST01 termination unit and uses this reference to correct its internal clock.
How does INTKM01 communicate with IMSET01 modules?
The ABB Bailey INTKM01 distributes time information to IMSET01 modules through an RS-485 time-sync link operating at 62.6 kbaud via NTST01 termination hardware.
What happens if the external time receiver is lost?
The ABB Bailey INTKM01 continues operating from its internal timing reference when the external receiver is unavailable. External synchronization normally improves the accuracy of the internal clock.
What is the difference between INTKM01 and IMSET01?
The ABB Bailey INTKM01 is the Time Keeper Master, while IMSET01 modules receive and use synchronized timing within the Sequence of Events system.
What should be checked before replacing an INTKM01 module?
The ABB Bailey INTKM01 replacement should match the exact module identification, NTST01 termination arrangement, IRIG-B reference connection, SOE topology, and associated INSEM01 and IMSET01 configuration.
Global Express Shipping
Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.
Returns & Warranty
30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official
Refund & Return Policy
.
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