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Relay timers (KETR, KEMR, KESR)

Relay timers, also known as time delay relays, timing relays, or timer relays, are essential components in industrial automation and control systems. These devices are designed to control the timing of electrical circuits, providing precise delays for switching operations. Common types include on-delay, off-delay, interval, and star-delta timers...

Relay timers, also known as time delay relays, timing relays, or timer relays, are essential components in industrial automation and control systems. These devices are designed to control the timing of electrical circuits, providing precise delays for switching operations. Common types include on-delay, off-delay, interval, and star-delta timers. They are available in various configurations, such as multifunction timers, single-function timers, and programmable timers, with adjustable time ranges from milliseconds to hours. Key technical specifications include supply voltages (e.g., 24V DC, 110V AC, 230V AC), contact configurations (e.g., 1CO, 2CO), and mounting types (e.g., DIN rail, panel mount). Relay timers are often integrated with contactors, motor starters, and PLCs to enhance system functionality.

Relay timers are widely used in industrial automation, building management, and process control applications. They are commonly installed in control panels, distribution boards, and motor control centers (MCCs). Typical sectors include manufacturing, water treatment, HVAC, energy management, and transportation. In automation systems, they control sequence operations, delay motor starts, manage lighting schedules, and protect equipment from short cycling. They are also critical in safety circuits, where precise timing ensures safe machine operation and emergency shutdown sequences.

Our inventory includes a comprehensive range of relay timers from leading manufacturers. Subcategories include multifunction timers (e.g., KETR series), single-function timers (e.g., KEMR series), and star-delta timers (e.g., KESR series). Key article codes often follow a pattern like KETR-1CO-24V, where 'KETR' denotes the series, '1CO' indicates the contact configuration, and '24V' specifies the supply voltage. Other common codes include KEMR-2CO-230V and KESR-1CO-400V. These timers are available with adjustable time ranges, LED status indicators, and screw or spring clamp terminals.

Partnering with Electric Automation Network ensures access to genuine relay timers with real-time pricing and up to 65% discount off list prices. Our engineering team provides personalized technical support to help you select the correct timer for your application, including guidance on time range, voltage, and contact configuration. We offer express worldwide shipping, with most orders dispatched within 24 hours. Detailed technical documentation, including wiring diagrams and datasheets, is available for every article. Trust us for reliable, cost-effective timing solutions for your industrial automation needs.

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Manufacturer Code Reference Catalog Number Description Delivery Price

153442

EMR5-R250-1-A

EMR5-R250-1-A

The relay Control Isolation; 1W; 250 V AC

Relay monitoring of insulation; 1 W; 250 V AC

3 View Availability View Price

095853

CS-TE

XTTRXBASE

Adapter cabinets CS

Adapter for ETR4, EMT6

Screw adapter

3 View Availability View Price

171858

ESR5-NV3-300

Y7-171858

Safety relays for emergency stop/protective door/light curtain monitoring, 24VDC, off-delayed, 0-300 sec.

ESR5-NV3-300

Eaton ESR5 Safety relays for emergency stop/protective door/light curtain monitoring, 24VDC, off-delayed, 0-300 sec.

2 View Availability View Price

221784

EMR4-F500-2

EMR4-F500-2

Phase sequence relay, 3p, 2W, 200-500VAC

Phase sequence relay; 3 poles; 2 W; 200-500 V AC

3 View Availability View Price

221789

EMR4-N100-1-B

EMR4-N100-1-B

Liquid level monitoring relay, 1W, 220-240V50/60Hz, 5-100kOhm

Fluid level monitoring relay; 1 W; 220-240 V 50/60 Hz; 5-100 kOhm

3 View Availability View Price

221790

EMR4-N500-2-B

EMR4-N500-2-B

Liquid level monitoring relay, 2W, 220-240V50/60Hz, 250-500Ohm

Fluid level monitoring relay; 2 W; 220-240 V 50/60 Hz; 250-500 Ohm

3 View Availability View Price

221791

EMR4-N500-2-A

EMR4-N500-2-A

Liquid level monitoring relay, 2W, 24-240VAC/DC, 250-500Ohm

Fluid level monitoring relay; 2 W; 24-240 V AC/DC; 250-500 Ohm

3 View Availability View Price

221795

EMR4-PH22

EMR4-PH22

Sealable shroud, B=22.5mm, for EMR4

Sealable cover; B=22.5mm; For EMR4

3 View Availability View Price

106942

EMR4-I1-1-A

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Current monitoring relay, 2W, 3-30mA, 10-100mA, 0.1-1A, 24-240VAC/DC

Relay monitoring intensity; 2 W; 3-30mA; 10-100mA; 0.1-1A; 24-240 V AC/DC

3 View Availability View Price

106943

EMR4-I15-1-A

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Current monitoring relay, 2 W, 0,3 - 1,5 A, 1 -5 A, 3 - 15 A

Relay monitoring intensity; 2 W; 0; 3-1; 5 A; 1-5 A; 3-15 A

Current monitoring relay, I/I= 0.3 - 1.5 A, 1 - 5 A, 3 - 15 A, 24 - 240 V AC, 50/60 Hz, 24 - 240 V DC

3 View Availability View Price

106944

EMR4-I15-1-B

EMR4-I15-1-B

Current monitoring relay, 2 W, 0,3 - 1,5 A, 1 -5 A, 3 - 15 A

Intensity monitoring relay; 2 W; 0; 3-1; 5 A; 1-5 A; 3-15 A

3 View Availability View Price

118700

ESR5-NO-21-24VAC-DC

Y7-118700

Safety relay emergency stop/protective door, 24VDC/AC, 2 enabling paths

ESR5-NO-21-24VAC-DC

Eaton ESR5 Safety relay emergency stop/protective door, 24VDC/AC, 2 enabling paths

3 View Availability View Price

118702

ESR5-NO-31-24VAC-DC

Y7-118702

Safety relay emergency stop/protective door, 24VDC/AC, 3 enabling paths

ESR5-NO-31-24VAC-DC

Safety relay emergency stop/protective door, 24VDC/AC, 3 enabling paths

3 View Availability View Price

118703

ESR5-NZ-21-24VAC-DC

Y7-118703

Safety two-hand relay, 24VDC/AC, 2-channel, 2 enabling paths

ESR5-NZ-21-24VAC-DC

Eaton ESR5 Safety two-hand relay, 24VDC/AC, 2-channel, 2 enabling paths

2 View Availability View Price

118704

ESR5-NO-31-AC-DC

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Safety relay emergency stop/protective door, 24V-230VDC/AC, 3 enabling paths

3 View Availability View Price

118705

ESR5-NV3-30

Y7-118705

Safety relay emergency stop/protective door/light curtain, 24 V DC, 4 enabling paths(2del.)

ESR5-NV3-30

Eaton ESR5 Safety relay emergency stop/protective door/light curtain, 24 V DC, 4 enabling paths(2del.)

2 View Availability View Price

118706

ESR5-VE3-42

Y7-118706

Contact expansion module, 24VDC/AC, 4 enabling paths off-delayed

ESR5-VE3-42

Eaton ESR5 Contact expansion module, 24VDC/AC, 4 enabling paths off-delayed

2 View Availability View Price

118707

ESR5-NE-51-24VAC-DC

Y7-118707

Contact expansion module, 24VDC/AC, 5 enabling paths

ESR5-NE-51-24VAC-DC

Eaton ESR5 Contact expansion module, 24VDC/AC, 5 enabling paths

3 View Availability View Price

119380

ESR5-NO-31-230VAC

Y7-119380

Safety relay emergency stop/protective door, 230VAC, 3 enabling paths

ESR5-NO-31-230VAC

Eaton ESR5 Safety relay emergency stop/protective door, 230VAC, 3 enabling paths ESR5-NO-31-230VAC

2 View Availability View Price

119426

ETR2-11-D

Y7-119426

Timing relay, 2W, 0.05s-100h, on-delayed, 24-240VAC 50/60Hz, 24-48VDC

ETR2-11-D

Eaton Moeller® series ETR2 Timing relay, 2W, 0.05s-100h, on-delayed, 24-240VAC 50/60Hz, 24-48VDC

2 View Availability View Price

119427

ETR2-12-D

Y7-119427

Timing relay, 2W, 0.05s-100h, off-delayed, 24-240VAC 50/60Hz, 24-48VDC

ETR2-12-D

Eaton Moeller® series ETR2 Timing relay, 2W, 0.05s-100h, off-delayed, 24-240VAC 50/60Hz, 24-48VDC

2 View Availability View Price

119428

ETR2-69-D

Y7-119428

Timing relay, 2W, 0.05s-100h, multi-function, 12-240VAC 50/60Hz, 12-240VDC

ETR2-69-D

Eaton Moeller® series ETR2 Timing relay, 2W, 0.05s-100h, multi-function, 12-240VAC 50/60Hz, 12-240VDC

2 View Availability View Price

153444

EMR5-R400-2-A

EMR5-R400-2-A

Insulation monitoring relay, 2W, 400VAC/ 600VDC

Insulation monitoring relay; 2 W; 400 V AC/ 600 V DC

3 View Availability View Price

153445

EMR5-RC690

EMR5-RC690

Insulation monitoring relay, AC/DC coupling module

Insulation monitoring relay; AC/DC coupling module

3 View Availability View Price

180413

ESR5-BWS-31-24VAC-DC

Y7-180413

Safety relays for controlled stop/protective door/light curtain monitoring, 24 V DC/AC, 3 enabling paths

ESR5-BWS-31-24VAC-DC

Eaton ESR5 Safety relays for controlled stop/protective door/light curtain monitoring, 24 V DC/AC, 3 enabling paths

3 View Availability View Price

134221

EMR5-W500-1-D

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Phase monitoring relay, over- undervoltage, 2W, 300-500V50/60Hz, tv=0.1-30s

Phase monitoring relay; Over-Undervoltage; 2 W; 300-500 V 50/60 Hz; tv=0.1-30 s

3 View Availability View Price

134222

EMR5-A400-1

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Phase imbalance monitoring relay, 2W, 300-500V/50/60Hz, tv=0.1-30s

Relay for monitoring phase imbalance; 2 W; 300-500V/50/60 Hz; tv=0.1-30 s

3 View Availability View Price

134223

EMR5-AW300-1-C

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Phase monitoring relay, multi-function, 2W, 160-300V50/60Hz

Relay for monitoring phase; Multi-Function; 2 W; 160-300 V 50/60 Hz

3 View Availability View Price

134224

EMR5-AW500-1-D

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Phase monitoring relay, multi-function, 2W, 300-500V50/60Hz

Phase monitoring relay; Multi; 2 W; 300-500 V 50/60 Hz

3 View Availability View Price

134225

EMR5-AWN170-1-E

-

Phase monitoring relay, multi-function, 2W, 90-170V50/60Hz

Relay for monitoring phase; Multi-Function; 2 W; 90-170 V 50/60 Hz

3 View Availability View Price

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