Eaton ETR4-70-A Multifunction Timing Relay, 24-240 V AC/DC, 2 Changeover Contacts, 0.05 s-100 h, DIN Rail

Control panel builders and industrial maintenance teams rely on the Eaton ETR4-70-A multifunction timing relay to sequence operations, delay start-ups, or pulse outputs in automation cabinets. This compact DIN rail module offers ten selectable timing functions and seven time ranges from 0.05 seconds to 100 hours, making it a versatile solution for conveyor controls, lighting systems, pump alternation, and machine interlocks.

Key specifications

• Supply voltage: 24-240 V AC/DC (wide-range, multi-voltage)
• Timing functions: 10 selectable (ON-delay, OFF-delay, flashing, pulse generator, star-delta, and more)
• Time ranges: 7 ranges covering 0.05 s to 100 h
• Output contacts: 2 changeover (CO) relays, rated 5 A @ 250 V AC resistive
• Mounting: DIN rail (35 mm), width 22.5 mm (1 module)
• Connection: Screw terminals
• Indicators: LED for power and relay status
• Operating temperature: -25 to +60 °C
• Protection: IP20 terminals, IP40 housing
• Approvals: CE, UL, CSA, GL, CCC, EAC, RCM

Why choose it

The ETR4-70-A simplifies inventory by accepting both AC and DC control voltages from 24 to 240 V, eliminating the need for multiple relay versions. Its 10 timing functions and seven selectable ranges cover nearly all industrial timing requirements, while the two changeover contacts provide isolated switching for control and load circuits. The 22.5 mm slim housing saves valuable rail space, and the clear LED indication speeds up commissioning and fault finding.

Ideal use cases

• Delayed start or stop of motors, fans, and pumps
• Flashing or pulsing signals for warning beacons and buzzers
• Star-delta starter timing in motor control centers
• Sequential switching in conveyor and packaging lines
• Time-based alternation of redundant equipment

Good to know

The timing accuracy is ±0.5% repeatability and ±5% setting tolerance, with a reset time below 100 ms. The relay is suitable for harsh industrial environments and carries marine (GL) and international approvals. For reliable operation, ensure the load does not exceed the contact rating and observe proper wiring practices for mixed AC/DC supplies.