Normally Closed (NC) Time Delay Relays
Description
Normally Closed (NC) Time Delay Relays are devices that control the timing of electrical circuits. In their default state, the contacts of these relays are closed, allowing current to flow through the circuit. When activated, they open the contacts after a specified delay, interrupting the current flow.
Working Principle
NC Time Delay Relays operate by maintaining their contacts in a closed position until a predetermined time delay has elapsed. When the relay receives an input signal, it starts the timing process. After the set delay, the contacts open, de-energizing the load. This functionality is useful for controlling processes that require a delay before deactivation, ensuring that systems operate in a controlled and timed manner.
Applications
NC Time Delay Relays are commonly used in industrial automation systems where precise timing is crucial. For example, they can be used in conveyor belt systems to delay the stopping of the belt after a sensor detects an object, ensuring the object is fully processed before the belt halts. They are also used in lighting systems to delay the turning off of lights after a switch is activated, providing a gradual transition to darkness.
Advantages over other Time Delay Relays
One advantage of NC Time Delay Relays is their ability to de-energize loads after a delay, which is particularly useful in applications where it is critical to ensure that a process completes before power is cut. This feature can be more beneficial than normally open (NO) relays in scenarios where maintaining power until a specific event occurs is necessary.
Limitations
A limitation of NC Time Delay Relays is that they may not be suitable for applications requiring immediate deactivation of a load upon receiving a signal. The inherent delay in opening the contacts can be a drawback in situations where rapid response is essential.
Considerations
When selecting NC Time Delay Relays, consider the initial cost, which can vary based on the complexity and features of the relay. Operating expenses are generally low, but it's important to factor in the durability and accuracy of the relay, as these can affect long-term performance and maintenance costs. Regular maintenance and timely replacement are crucial to ensure reliability and prevent unexpected failures in critical applications.
from DigiKey
Time Delay Relay Delay [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Time Ranges: 0.5 Sec ~ 10 Sec
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 0.1000
from DigiKey
RELAY TIME DELAY 180SEC 10A 600V [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: Off-Delay
- Time Ranges: 5 Sec ~ 180 Sec
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 0.1000
from DigiKey
RELAY TIME DELAY 60SEC 10A 600V [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Time Ranges: 0.2 Sec ~ 60 Sec
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 0.1000
from DigiKey
RELAY TIME DELAY 60SEC 10A 600V [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Time Ranges: 0.2 Sec ~ 60 Sec
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 0.1000
from DigiKey
On-Delay Time Delay Relay SPST-NC (1 Form B) Fixed, 165 Sec Delay Chassis Mount [See More]
- Contact Configuration: Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Time Ranges: Fixed, 165 Sec
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 0.1000
from DigiKey
DIGITAL TIMER, 18 MULTI-FUNCTION [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Time Ranges: 0.1 Sec ~ 999 Hrs
- Function Type: Multi-function
- Pole and Throw Specifications: Double Pole, Single Throw (DPST)
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 6
from DigiKey
On-Delay Time Delay Relay DPST-NO/NC (1 Form A and B) 0.1 Sec ~ 10 Min Delay 3A @ 250VAC Through Hole [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Time Ranges: 0.1 Sec ~ 10 Min
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 6
from DigiKey
On-Delay Time Delay Relay DPST-NO/NC (1 Form A and B) 0.1 Sec ~ 10 Min Delay 3A @ 250VAC Through Hole [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Time Ranges: 0.1 Sec ~ 10 Min
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 6
from DigiKey
On-Delay Time Delay Relay DPST-NO/NC (1 Form A and B) 0.1 Sec ~ 10 Min Delay 3A @ 250VAC Through Hole [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Time Ranges: 0.1 Sec ~ 10 Min
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 6
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 6
from RS Components, Ltd.
Miniature timers with multiple time ranges and operating modes. â € ¢ 8 or 14-pin models available. â € ¢ Multiple operating modes. â € ¢ Black design. â € ¢ Power supply terminals on top and contact output terminals on bottom. â... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: Delay ON, Flicker OFF Start, Flicker ON Start
- Minimum: 0.1000
from RS Components, Ltd.
Function 111. 8 pin. Time range selectable by screwdriver from a rotary switch on the side of the module. Lockable dial to prevent tampering. DPDT contact configuration. AgCdO contact material. Supply Voltage = 230 V ac. Time Range = 6 s - 6 h. Mode of Operation = ON Delay Energise. Mounting Type =... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 6
from RS Components, Ltd.
Function 111. 8 pin. Time range selectable by screwdriver from a rotary switch on the side of the module. Lockable dial to prevent tampering. DPDT contact configuration. AgCdO contact material. Supply Voltage = 110 V ac. Time Range = 6 s - 6 h. Mode of Operation = ON Delay Energise. Mounting Type =... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 6
from RS Components, Ltd.
Function 111. 11 pin. Time range selectable by screwdriver from a rotary switch on the side of the module. Lockable dial to prevent tampering. Suitable for plug-in or panel mounting applications. AgCdo contact material. 45 x 45mm panel cutout. Supply Voltage = 230 V ac. Time Range = 6s - 6h. Mode of... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 6
from RS Components, Ltd.
Function 111. 11 pin. Time range selectable by screwdriver from a rotary switch on the side of the module. Lockable dial to prevent tampering. Suitable for plug-in or panel mounting applications. AgCdo contact material. 45 x 45mm panel cutout. Supply Voltage = 110 V ac. Time Range = 6 s - 6 h. Mode... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 6
from RS Components, Ltd.
Function 311. Time range selectable by screwdriver from a rotary switch on the side of the module. Lockable dial to prevent tampering . 45 x 45mm panel cut-out. Contact material AgCdO. Supply Voltage = 230 V ac. Time Range = 3 s - 30 m. Mode of Operation = True OFF Delay Deenergise. Mounting Type =... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: Off-Delay
- Minimum: 3
from RS Components, Ltd.
Function 311. Time range selectable by screwdriver from a rotary switch on the side of the module. Lockable dial to prevent tampering . 45 x 45mm panel cut-out. Contact material AgCdO. Supply Voltage = 110 V ac. Time Range = 3 s - 30 m. Mode of Operation = True ON Delay Deenergise. Mounting Type =... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 3
from RS Components, Ltd.
Functions - 142, 161, 454, 211, 411, 661, 24 hour mode. IP65 (Front Face). External 3Vdc battery back-up to retain clock on 24 hour mode only, at loss of voltage. Four reset/start modes: unconditional reset, start only after time, either from front panel or external volt free contacts. 6 timing... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: ON-Delay; Interval; Time Indicator
- Minimum: 0.0
from RS Components, Ltd.
Function - 111. Supply Voltage = 110 V ac. Time Range = 3 - 60 s. Mode of Operation = ON Delay Energise. Mounting Type = Plug In. Number of Timer Functions = Single. Number of Contacts = 4. Time Increment = Seconds. Power Supply = External. Contact Configuration = 4P-NO/NC. Current Maximum = 3 A [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 3
from RS Components, Ltd.
Function - 111. Supply Voltage = 110 V ac. Time Range = 1.5 - 30 min. Mode of Operation = ON Delay Energise. Mounting Type = Plug In. Number of Timer Functions = Single. Number of Contacts = 4. Time Increment = Minutes. Power Supply = External. Contact Configuration = 4P-NO/NC. Current Maximum = 3 A [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 90
from RS Components, Ltd.
Functions - 121, 211, 411, 453, 662. LCD display can be set to count down or count up. For a suitable base with easy to configure rear terminals see stock no. 403-869. Panel mount. Supply Voltage = 18 - 264 V ac, 18 - 300 V dc. Time Range = 0.01 - 99.9 h, 0.01 - 99.9 min, 0.1 - 99.9 s. Mode of... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: ON-Delay; Interval
- Minimum: 0.1000
from RS Components, Ltd.
Function 111. Can be panel mounted from 48 x 48mm front bezel or chassis/DIN rail mounted via a plug-in socket. LED indication of power on and relay energised. DPDT contact configuration. AgCdO contact material. Supply Voltage = 110 V ac. Time Range = 1.5 - 30 min. Mode of Operation = ON Delay... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 90
from RS Components, Ltd.
Function 111. Can be panel mounted from 48 x 48mm front bezel or chassis/DIN rail mounted via a plug-in socket. LED indication of power on and relay energised. DPDT contact configuration. AgCdO contact material. Supply Voltage = 110 V ac. Time Range = 5 - 200 s. Mode of Operation = ON Delay... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 5
from RS Components, Ltd.
Function 111. Can be panel mounted from 48 x 48mm front bezel or chassis/DIN rail mounted via a plug-in socket. LED indication of power on and relay energised. DPDT contact configuration. AgCdO contact material. Supply Voltage = 110 V ac. Time Range = 0.5 - 20 s. Mode of Operation = ON Delay... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: ON-Delay
- Minimum: 0.5000
from RS Components, Ltd.
Functions - 651. LED indication of power on and relay energised. Supply frequency range 50-60Hz. AgCdO contact material. Supply Voltage = 110 V ac. Time Range = 0.5 - 20 s. Mode of Operation = Delay Cycle. Mounting Type = Panel Mount, Plug In. Number of Timer Functions = Single. Number of Contacts =... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Single Function
- Timer Type: Delay Cycle
- Minimum: 0.5000
from Eaton Corporation
AC OPERATED TYPE. UL, CSA APPROVAL. PANEL MOUNTING. 110 VAC AT 50 HZ, 120 VAC AT 60 HZ COIL VOLTAGE. 0.5 TO 180 SEC TIMING RANGE. OFF DELAY/ON DELAY TIMING MODE. 1NO-1NC TIMED CONTACT CONFIGURATION. D80 MODEL [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: ON-Delay; Off-Delay
- Minimum: 0.5000
from Airotronics
TBKA timers are solid state output units with digital timing and come in a 1 5?8" square case. They are available only for 8-40 VDC. Ease of installation and hook-up is a primary design benefit. All models are available with integral time adjustment knob or factory-fixed time, and require only three... [See More]
- Contact Configuration: Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: ON-Delay; Off-Delay; Recycle
- Time Range: Single Time Range; Multiple Time Ranges (optional feature); Field Selectable (optional feature)
from Quarktwin Technology Ltd.
Time Delay Relay DPST-NO/NC (1 Form A and B) 0.5 Sec ~ 20 Sec Delay 5A @ 120VAC/28VDC Chassis Mount [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Maximum: 0.0056
- Minimum: 0.5000
- Time Ranges: 0.5 Sec ~ 20 Sec
from Macromatic Industrial Controls, Inc.
Duplex Alternating Relays are used in special applications where the optimization of load usage is required by equalizing the run time of two loads. This alternating action is initiated by a control switch, such as a float switch, manual switch &, timing relay, pressure switch, or other isolated... [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Display Type: None
- Input Controls: Analog Front Panel
- Switch Type: Electromechanical
from Eaton Corporation
AC OPERATED TYPE. UL, CSA APPROVAL. PANEL MOUNTING. 110 VAC AT 50 HZ, 120 VAC AT 60 HZ COIL VOLTAGE. 0.5 TO 180 SEC TIMING RANGE. OFF DELAY/ON DELAY TIMING MODE. 1NO-1NC TIMED CONTACT CONFIGURATION. 2NO-2NC INSTANTANEOUS CONTACT CONFIGURATION. D80 MODEL [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: ON-Delay; Off-Delay
- Minimum: 0.5000
from Airotronics
TBL timers are solid state output units with digital timing and come in a 1 5?8" square case. They are available for 8-40 VDC. Ease of installation and hook-up is a primary design benefit. All models with integral time adjustment knob or factory-fixed time require only three connections. [See More]
- Contact Configuration: Normally Closed (NC)
- Function Type: Single Function
- Timer Type: Interval; Recycle
- Time Range: Single Time Range; Multiple Time Ranges (optional feature); Field Selectable (optional feature)
from Quarktwin Technology Ltd.
On-Delay Time Delay Relay DPST-NO/NC (1 Form A and B) 0.5 Sec ~ 10 Sec Delay 3A @ 250VAC DIN Rail [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Minimum: 0.5000
- Timer Type: ON-Delay
- Maximum: 0.0028
from Eaton Corporation
AC OPERATED TYPE. UL, CSA APPROVAL. PANEL MOUNTING. 220 VAC AT 50 HZ, 240 VAC AT 60 HZ COIL VOLTAGE. 0.5 TO 180 SEC TIMING RANGE. OFF DELAY/ON DELAY TIMING MODE. 1NO-1NC TIMED CONTACT CONFIGURATION. D80 MODEL [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Function Type: Multi-function
- Timer Type: ON-Delay; Off-Delay
- Minimum: 0.5000
from Airotronics
THL timers are solid state output units with digital timing. The THL comes in a 2" square case. Ease of installation and hook-up is a primary design benefit. All models with integral time adjustment knob or factory-fixed time require only two connections. They may be wired in-line just like a single... [See More]
- Contact Configuration: Normally Closed (NC)
- Function Type: Single Function
- Timer Type: Interval; Recycle
- Time Range: Single Time Range; Multiple Time Ranges (optional feature); Field Selectable (optional feature)
from Quarktwin Technology Ltd.
On-Delay Time Delay Relay DPST-NO/NC (1 Form A and B) 0.1 Sec ~ 10 Min Delay 3A @ 250VAC Through Hole [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Minimum: 0.1000
- Timer Type: ON-Delay
- Maximum: 0.1667
from Quarktwin Technology Ltd.
On-Delay Time Delay Relay DPST-NO/NC (1 Form A and B) 0.1 Sec ~ 10 Min Delay 3A @ 250VAC Through Hole [See More]
- Contact Configuration: Normally Open (NO); Normally Closed (NC)
- Minimum: 0.1000
- Timer Type: ON-Delay
- Maximum: 0.1667