ABB Controls SSAC Timer Selection Guide 

Delay on Make | Operation & Time Diagram

Time Delay Relays: Plug-in Package -- 8 or 11 Pin Base
These products are housed in the popular octal or 11 pin plug-in package and require an accessory socket for connection and mounting. A complete selection of time delay ranges and adjustment methods are available.

Universal Time Delay Relays, Microcomputer Control 
TRDU, Switch Adjustable, Universal Function, Single Voltage, Digital Timing to 1,705 h 
TRU, Knob Adjustable, Universal Voltage & Function, Digital Timing to 16.6 h
TDMB, (Delay on Make & Delay on Break) Switch Adjustable, Single Voltage, Digital Timing to 2.8 h 

Single Function -- Single Voltage -- 10A DPDT Contacts -- 8 Pin Base 
TDM, Switch Adjustable, Digital Timing to 2.8 h 
PRLM, Fixed, or Knob Adjustable, LED, Analog Timing to 10 m 
TRM, Fixed, External, Lock, or Knob Adjustable, Analog Timing to 10 m 

Time Delay Relays: Surface Mount
These products are mounted on a back panel and some can be mounted on 35mm Din Rail with an accessory adaptor. They have male 0.25" quick connect terminals for connections. All are single voltage. Low cost open PC board or encapsulated in a molded package to protect the solid state digital circuitry. Open PC Board Construction 
ORM, Low Cost, 10A DPDT, Fixed, External or Knob Adjustable, Analog Timing to 300 s  Encapsulated 
ERDM, 10A DPDT, Fixed, External or Knob Adjustable, Digital Timing to 8 h 
HRDM, 15A SPST, Fixed, External or Knob Adjustable, Digital Timing to 1.6 h 
KRPS, Compact, 10A SPDT, Fixed, External, or Knob Adjustable, Micro Timing to 1000 h 
KRDM, Compact, 10A SPDT, Fixed or Knob Adjustable, Digital Timing to 1.6 h 

All Solid State Timing Modules-

General Use -- Single Voltage, Surface mount with one screw or most can use the P1023-20 DIN rail adaptor.

Analog Timing, 1A Steady State Normally Open
TS1 Factory Fixed or External Adjust, 0.05 to 600 seconds  Analog Timing, 1A Steady State Normally Closed 
TS4, Factory Fixed or External Adjust, 0.05 to 600 seconds  Analog Timing, 1A Steady State Normally Open, Universal Voltage 
TMV, 24 to 240VAC/DC, Knob Adjustable, 0.1 to 8 minutes
TSU, 24 to 240VAC/DC, External Adjustment, 5 to 480 seconds  Analog Timing, 0.5A Steady State Normally Open, PC Board or Surface Mount
MSM, Factory Fixed, 0.05 to 180 seconds  Digital Timing, 1A Steady State Normally Open 
KSD1, Factory Fixed or External Adjust, 0.1 to 500 minutes 
TSD1, Factory Fixed or External Adjust, 0.2 second to 166 hours  Digital Timing, 1A Steady State Normally Closed 
KSD4, Factory Fixed or External Adjust, 0.1 second to 500 minutes 
TSD4, Factory Fixed or External Adjust, 0.2 second to 166 minutes  Digital Timing, 1A Steady State Normally Open, Universal Voltage 
KSDU, 24 to 240VAC/DC in 2 ranges, Factory Fixed, 0.1 second to 2.8 hours
TDU, 24 to 277VAC/DC in 2 ranges, Switch Adjustment, 0.1 second to 2.8 hours 

Microcontroller, 1A Steady State 
KSPS, Single Voltage, Knob, External Adjust, or Fixed, 0.1 second to 1000 hours
KSPU, Single Voltage, Switch Adjustment, 100 ms to 1023 hours 

High Power --Single AC Voltage, Must be surface mounted to a metal surface with one #8 or #10 screw for proper heat dissipation.  Analog Timing, 6A, 10A, or 20A Normally Open 
TH1, Factory Fixed or External Adjust, 0.1 to 600 seconds  Digital Timing, 6A, 10A, or 20A Normally Open 
THD1, Factory Fixed or External Adjust, 0.1 second to 1000 minutes
THDM, Factory Fixed or External Adjust, 1 second to 1000 minutes  Digital Timing, 6A, 10A, or 20A Normally Closed 
THD4, Factory Fixed or External Adjust, 0.1 second to 1000 minutes 

Microcontroller, 6A, 10A, or 20A Steady State 
NHPS, Single Voltage, Switch Adjustment, 0.1 second to 1000 hours
NHPU, Single Voltage, Switch Adjustment, 100 ms to 1000 hours 
 

Interval | Operation & Time Diagram 

(Also known as: ON Interval, Interval ON, Pulse Shaping, Single Pulse on Operate, Bypass Timing)

Time Delay Relays: Plug-in Package -- 8 or 11 Pin Base 
These products are housed in the popular octal or 11 pin plug-in package and require an accessory socket for connection and mounting. A complete selection of time delay ranges and adjustment methods are available.  Universal Time Delay Relays, Microcomputer Control 
TRDU, Switch Adjustable, Universal Function, Single Voltage, Digital Timing to 1,705 hours 
TRU, Knob Adjustable, Universal Voltage & Function, Digital Timing to 16.6 hours  Single Function -- Single Voltage -- 10A DPDT Contacts -- 8 Pin Base 
TDI, Switch Adjustable, Digital Timing to 2.8 hours 
PRLS, (Single Shot), Fixed, or Knob Adjustable, LED, Analog Timing to 10 minutes 
TRS, (Single Shot), Fixed, External, Lock, or Knob Adjustable, Analog Timing to 10 minutes  Time Delay Relays: Surface Mount 
These products are mounted on a back panel and some can be mounted on 35mm Din Rail with an accessory adaptor. They have male 0.25" quick connect terminals for connections. All are single voltage. Low cost open PC board or encapsulated in a molded package to protect the solid state digital circuitry.  Open PC Board Construction 
ORS, (Single Shot), Low Cost, 10A DPDT, Fixed, External or Knob Adjust, Analog Timing to 300 seconds  Encapsulated 
ERDI, 10A DPDT, Fixed, External or Knob Adjustable, Digital Timing to 8 hours 
HRDI, 15A SPST, Fixed, External or Knob Adjustable, Digital Timing to 1.6 hours 
KRDI, Compact, 10A SPDT, Fixed or Knob Adjustable, Digital Timing to 1.6 hours 
KRPS, Compact, 10A SPDT, Fixed, External, or Knob Adjustable, Micro Timing to 1000 hours 
 

All Solid State Timing Modules-

General Use -- Single Voltage, Surface Mount, most can use the P1023-20 DIN rail adaptor.

Analog Timing, 1A Steady State, AC Input Voltage 
TS2, Factory Fixed or External Adjust, 0.05 to 600 seconds  Analog Timing, 1A Steady State, DC Input Voltage 
TS6, Factory Fixed or External Adjust, 0.05 to 600 seconds  Digital Timing, 1A Steady State, AC Input Voltage 
KSD2, Factory Fixed or External Adjust, 0.1 second to 500 minutes
TSD2, Factory Fixed or External Adjust, 0.2 second to 166 hours
TSD7, Factory Fixed or External Adjust, 1 second to 1000 minutes  Digital Timing, 1A Steady State, DC Input Voltage 
TSD6, Factory Fixed or External Adjust, 0.1 second to 166 minutes  Digital Timing, 1A Steady State, Universal Voltage
TDUI, 24 to 240V AC/DC in 2 ranges, Switch Adjustment, 0.1 second to 2.8 hours  High Power --Single AC Voltage, Must be surface mounted to a metal surface with one #8 or #10 screw for proper heat dissipation. 
Microcontroller, 1A Steady State, Single Voltage, Knob, External Adjust or Fixed, 0.1 seconds to 1000 hours
KSPS, Solid State Output, Choose 1 of 10 Standard Functions, 12 to 230 V in 6 Ranges
KSPU, Factory Programed, Choose 1 of 12 Standard Functions, Accurate Switch Adjustment  Analog Timing, 6A, 10A, or 20A Steady State 
TH2, Factory Fixed or External Adjust, 0.05 to 60 seconds  Digital Timing, 6A, 10A, or 20A Steady State 
THD2, Factory Fixed or External Adjust, 0.1 second to 1000 minutes
THD7, Factory Fixed or External Adjust, 1 second to 1000 minutes 

Microcontroller, 1 A, 10 A, or 20 A Steady State 
NHPS, 12 to 230 V in 3 Ranges, Delays form 100 milliseconds to 1000 hours 
NHPU, 24 to 230 V in 3 Ranges, Accurate Switch Adjustment 
 

Recycling & Percentage Timing | Operation & Time Diagram

(Also known as: Recycle Timing, Repeat Cycle, Flasher, Blinker, Duty Cycle, Cycle Timer) 

Time Delay Relays: Plug-in Package -- 8 or 11 Pin Base 
These products are housed in the popular octal or 11 pin plug-in package and require an accessory socket for connection and mounting. A complete selection of time delay ranges and adjustment methods are available.  Universal Time Delay Relays, Microcomputer Control 
TRDU, Switch Adjustable, Universal Function, Single Voltage, Digital Timing to 1,705 hours 
TRU, Knob Adjustable, Universal Voltage & Function, Digital Timing to 16.6 hours  Single Function -- Single Voltage -- 10A DPDT Contacts -- 8 Pin Base 
TDR, Switch Adjustable Delays, Digital Timing to 2.8 hours  Time Delay Relays: Surface Mount, Encapsulated
These products are mounted on a back panel and some can be mounted on 35mm Din Rail with an accessory adaptor. They have male 0.25" quick connect terminals for connections. All are single voltage. Low cost open PC board or encapsulated in a molded package to protect the solid state digital circuitry.

HRD3, (Equal Times), 15A SPST, Fixed, External,or Knob Adjustable, Digital Timing to 1.6 hours
HRDR, 15A SPST, Fixed, External, or Knob Adjustable, Digital Timing to 8.3 hours 
KRD3, (Equal Times) Compact, 10A SPDT, Fixed or Knob Adjustable, Digital Timing to 1.6 hours 
KRDR, (Different Times) Compact, 10A SPDT, Fixed or Knob Adjustable, Digital Timing to 8.3 hours 
KRPS, Compact, 10A SPDT, Fixed, External, or Knob Adjustable, Micro Timing to 1000 hours 

All Solid State Timing Modules-

General Use -- Single Voltage, Some surface mount with one screw or P1023-20 DIN rail adaptor . 
Digital Timing, 1A Steady State 
ESDR, Knob, Factory Fixed or External Adjust, .1 second to 1000 minutes
KSD3, Factory Fixed or External Adjust, 0.1 second to 500 minutes, 2 mounting screws 
KSDR, Factory Fixed or External Adjust, 0.1 second to 1000 minutes
RS, Switch Adjustment, 0.1 second to 256 hours, 2 mounting screws
TSD3, Factory Fixed or External Adjust, 0.2 second to 166 hours
TSDR, Factory Fixed or External Adjust, 0.1 second to 1000 minutes 

Digital Timing, 1A Steady State, Percentage Timer
PT, Knob Adjustment, 10 seconds to 1000 minutes, 2 mounting screws Microcontroller, 1A Steady State 
KSPS, Single Voltage, Knob, External Adjust, or Fixed, 0.1 second to 1000 hours 
KSPU, Single Voltage, Switch Adjustment, 100 ms to 1023 hours  High Power -- Single AC Voltage, Must be surface mounted to a metal surface with one #8 or #10 screw for proper heat dissipation.
Digital Timing, 6A, 10A, or 20A Steady State
THD3, Factory Fixed or External Adjust, 0.1 second to 1000 minutes Digital Timing, 6A, 10A, or 20A Steady State, Percentage Timer
PTHA, External Adjust, 0.1 second to 10 minutes
PTHF, External Adjust, 10 to 1000 seconds

Microcontroller, 6A, 10A, or 20A Steady State 
NHPS, Single Voltage, Switch Adjustment, 0.1 second to 1000 hours
NHPU, Single Voltage, Switch Adjustment, 100 ms to 1000 hours 

Single Shot | Operation & Time Diagram

(Also known as: One Shot Relay, Single Shot Interval, Pulse Shaping, Pulse Former) 

Time Delay Relays: Plug-in Package -- 8 or 11 Pin Base 
These products are housed in the popular octal or 11 pin plug-in package and require an accessory socket for connection and mounting. A complete selection of time delay ranges and adjustment methods are available.  Universal Time Delay Relays, Microcomputer Control 
TRDU, Switch Adjustable, Universal Function, Single Voltage, Digital Timing to 1,705 hours 
TRU, Knob Adjustable, Universal Voltage & Function, Digital Timing to 16.6 hours  Single Function -- Single Voltage -- 10A Contacts -- 8 (SPDT) or 11 (DPDT) Pin Base 
TDS, Switch Adjustable, Single Voltage, Digital Timing to 2.8 hours 
PRLS, Fixed, or Knob Adjustable, LED, Analog Timing to 10 minutes 
TRS, Fixed, External, Lock, or Knob Adjustable, Analog Timing to 10 minutes  Time Delay Relays: Surface Mount
These products are mounted on a back panel and some can be mounted on 35mm Din Rail with an accessory adaptor. They have male 0.25" quick connect terminals for connections. All are single voltage. Low cost open PC board or encapsulated in a molded package to protect the solid state digital circuitry.  Open PC Board Construction 
ORS, Low Cost, 10A DPDT, Fixed, External or Knob Adjust, Analog Timing to 300 seconds  Encapsulated 
ERDI, 10A DPDT, Fixed, External, or Knob Adjustable, Digital Timing to 8 hours 
HRDS, 15A SPST, Fixed, External, or Knob Adjustable, Digital Timing to 1.6 hours 
HRD9, (Retriggerable), 15A SPST, Fixed, External, or Knob Adjustable, Digital Timing to 1.6 hours 
KRDS, Compact, 10A SPDT, Fixed or Knob Adjustable, Digital Timing to 1.6 hours 
KRD9, Compact, 10A SPDT, Fixed or Knob Adjustable, Digital Timing to 1.6 hours 
KRPS, Compact, 10A SPDT, Fixed, External, Knob Adjustable, Micro Timing to 1000 hours 

All Solid State Timing Modules-

General Use -- Single Voltage, Most surface mount with one screw or P1023-20 DIN rail adaptor. 
Analog Timing, 1A Steady State
TSS, Factory Fixed or External Adjust, 0.05 to 600 seconds 

Digital Timing, 1A Steady State
KSDS, Factory Fixed or External Adjust, 0.1 second to 500 minutes
TSDS, Factory Fixed or External Adjust, 0.1 second to 16.6 hours Digital Timing, 1A Steady State, Universal Voltage
TDUS, 24 to 240V AC/DC in 2 ranges, Switch Adjustment, 0.1 second to 2.8 hours, 2 mounting screws Microcontroller, 1 A Steady State 
KSPS, Single Voltage, Knob, External Adjust, or Fixed, 0.1 second to 1000 hours 
KSPU, Single Voltage, Switch Adjustment, 100 ms to 1023 hours  High Power -- Single AC Voltage, Must be surface mounted to a metal surface with one #8 or #10 screw for proper heat dissipation. 
Analog Timing, 6A, 10A, or 20A Steady State 
THS, Factory Fixed or External Adjust, 0.1 to 600 seconds Digital Timing, 6A, 10A, or 20A Steady State 
THDS, Factory Fixed or External Adjust, 0.1 second to 1000 minutes Microcontroller, 6A, 10A, or 20A Steady State 
NHPS, Single Voltage, Switch Adjustment, 0.1 second to 1000 hours 
NHPU, Single Voltage, Switch Adjustment, 100 ms to 1000 hours 

Isolated -- Single Voltage, Electrical isolation between input and output (1500 Volts RMS), Surface mount with two screws 
Digital Timing, 1A Steady State 
EISS, Factory Fixed or External Adjust, 0.1 second to 1000 minutes
EIS9, Factory Fixed or External Adjust, 0.2 second to 1000 minutes 

Delay on Break | Operation & Time Diagram

(Also known as: OFF Delay, Release Delay, Delay on Release, Postpurge Delay) 

Time Delay Relays: Plug-in Package -- 8 or 11 Pin Base
These products are housed in the popular octal or 11 pin plug-in package and require an accessory socket for connection and mounting. A complete selection of time delay ranges and adjustment methods are available.  Universal Time Delay Relays, Microcomputer Control 
TRDU, Switch Adjustable, Universal Function, Single Voltage, Digital Timing to 1,705 hours 
TRU, Knob Adjustable, Universal Voltage & Function, and Digital Timing to 16.6 hours 
TDMB, (Delay on Make & Delay on Break) Switch Adjustable, Single Voltage, Digital Timing to 2.8 hours  Single Function -- Single Voltage -- 10A Contacts -- 8 (SPDT) or 11 (DPDT) Pin Base
TDB, Switch Adjustable, Digital Timing to 2.8 hours 
PRLB, Fixed, or Knob Adjustable, LED, Analog Timing to 10 minutes 
TRB, Fixed, External, Lock, or Knob Adjustable, Analog Timing to 10 minutes  Time Delay Relays: Surface Mount 
These products are mounted on a back panel and some can be mounted on 35mm Din Rail with an accessory adaptor. They have male 0.25" quick connect terminals for connections. All are single voltage. Low cost open PC board or encapsulated in a molded package to protect the solid state digital circuitry.  Open PC Board Construction 
ORB, Low Cost, 10A DPDT, Fixed, External, or Knob Adjustable, Analog Timing to 300 seconds  Encapsulated 
HRDB, 15A SPST, Fixed, External or Knob Adjustable, Digital Timing to 1.6 hours 
KRDB, Compact, 10A SPDT, Fixed or Knob Adjustable, Digital Timing to 1.6 hours 
KRPS, Compact, 10A SPDT, Fixed or Knob Adjustable, Micro Timing to 1000 hours 

All Solid State Timing Modules-

General Use -- Single Voltage, Surface Mount, most can use the P1023-20 DIN rail adaptor. 
Analog Timing, 1A Steady State
TSB, Factory Fixed or External Adjust, .05 to 600 seconds 

Digital Timing, 1A Steady State
KSDB, Factory Fixed or External Adjust, .1 second to 500 minutes
TSDB, Factory Fixed or External Adjust, .1 second to 16.6 hours
TSD7, Factory Fixed or External Adjust, 1 second to 1000 minutes  Digital Timing, 1A Steady State, Universal Voltage
TDUB, 24 to 2480V AC/DC in 2 ranges, Switch Adjustment, .1 seconds to 2.8 hours Microcontroller, 1A Steady State 
KSPS, Single Voltage, Knob, External Adjust, or Fixed, 0.1 second to 1000 hours 
KSPU, Single Voltage, Switch Adjustment, 100 ms to 1023 hours  High Power -- Single AC Voltage, Must be surface mounted to a metal surface with one #8 or #10 screw for proper heat dissipation. 
Analog Timing, 6A, 10A, or 20A Steady State 
THB, Factory Fixed or External Adjust, .1 to 600 seconds Digital Timing, 6A, 10A, or 20A Steady State
THDB, Factory Fixed or External Adjust, .1 second to 1000 minutes
THD7, 2 Terminal Connection, Fixed or External Adjust, 1 second to 1000 minutes Microcontroller, 6A, 10A, or 20A Steady State 
NHPS, Single Voltage, Switch Adjustment, 0.1 second to 1000 hours 
NHPU, Single Voltage, Switch Adjustment, 100 ms to 1000 hours 

Isolated -- Single Voltage, Electrical isolation between input and output (1500 Volts RMS), Surface mount with two screws 
Digital Timing, 1A Steady State
EISB, Factory Fixed or External Adjust, 0.2 seconds to 1000 minutes 
 

Multifunction Timers  (More than one function in the unit)

Relay Contact
Solid State

Dual Functions / Special Functions