Macromatic
Macromatic TR-55121-05 Time Delay Relay, Octal, Cycle On, 240V AC
Octal-base time-delay relay provides a single cycle-on function adjustable from 0.1 to 10 seconds with DPDT contacts rated 10 A at 240 V AC
- Adjustable timing from 0.1 to 10 seconds for flexible cycle control
- DPDT contacts rated 10 A at 240 V AC handle demanding loads
- Octal 8-pin plug-in base enables quick socket installation
- Enclosed IP20 housing protects internal components in industrial settings
- Single-function Cycle On operation simplifies repetitive timing tasks
Application & Fit
The Macromatic TR-55121-05 is a single-function time delay relay built for 240 V AC control circuits. It suits panels that need a repeating on-off cycle driven by a potentiometer adjustment. Buyers who need multiple independent delay modes or a different coil voltage will need another device.
Install Notes
The relay plugs into an octal socket using eight flat pins, so wiring is limited to the socket terminals. The enclosed IP20 body requires no extra sealing, but the installer must verify that the socket is rated for 10 A at the working voltage. A loose socket or undersized wire is the most common cause of overheating.
Pre-Order Checks
Confirm that the control supply is 240 V AC and that the load does not exceed 10 A at 240 V AC or 10 A at 30 V DC. The timing range runs from 0.1 sec to 10 sec, so the required cycle period must fall inside that window. Ensure the panel cut-out accepts an octal plug-in base before ordering.
Highlights
- Adjustable timing from 0.1 to 10 seconds for flexible cycle control
- DPDT contacts rated 10 A at 240 V AC handle demanding loads
- Octal 8-pin plug-in base enables quick socket installation
- Enclosed IP20 housing protects internal components in industrial settings
- Single-function Cycle On operation simplifies repetitive timing tasks
Specifications
| Brand | MACROMATIC |
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Questions about this item
How do I confirm the Macromatic TR-55121-05 is cycling correctly after wiring it into the octal socket?
Apply 240V AC power and observe the load switching on and off repeatedly; the potentiometer adjusts the cycle between .1 and 10 seconds, and the DPDT contacts rated at 10 A will change state each interval.
What comes with the relay and what must I source separately?
The unit includes the enclosed plug-in relay with eight flat pins; you must supply a compatible octal socket and the 240V AC control circuit wiring.
Which time-delay version should I choose for a repeating on/off cycle?
Select the Cycle On function version, which provides a single repeating delay adjustable from .1 to 10 seconds at 240V AC with 10 A DPDT contacts.
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