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Macromatic
Macromatic TR-55121-10 time delay relay, octal, cycle on, 240V AC, 10 A, 1.8 s–3 min
Octal plug-in time delay relay with cycle-on function, adjustable from 1.8 seconds to 3 minutes, rated 10 A at 240 V AC
- Octal plug-in base enables quick socket mounting
- DPDT contacts switch 10 A at 240 V AC or 30 V DC
- Cycle-on delay adjustable from 1.8 s to 3 min via potentiometer
- Enclosed IP20 housing protects internal components
- Single-function design simplifies wiring for repetitive timing tasks
Single-function cycle-on relay
The Macromatic TR-55121-10 is a single-function time delay relay built for 240 V AC control circuits. It uses an octal plug-in base with eight pins and provides a DPDT contact rated at 10 A for both 240 V AC and 30 V DC loads. The delay function is cycle on, adjustable by potentiometer between 1.8 s and 3 min.
Suited for repetitive on-off timing
This relay suits panels that need a repeating on-off cycle driven by a single adjustable timer. It is not for applications that require multiple independent delay modes, separate on-delay and off-delay settings, or a different coil voltage. Buyers needing a wider time range or additional contact forms should look at other models.
Fits octal sockets in enclosed panels
The unit mounts by plugging into a standard octal socket, so wiring stays outside the relay body. Its IP20 enclosed housing protects internal contacts in typical cabinet environments. The potentiometer adjustment is accessible on the face, freeing the installer from opening the enclosure to change the cycle period.
Highlights
- Octal plug-in base enables quick socket mounting
- DPDT contacts switch 10 A at 240 V AC or 30 V DC
- Cycle-on delay adjustable from 1.8 s to 3 min via potentiometer
- Enclosed IP20 housing protects internal components
- Single-function design simplifies wiring for repetitive timing tasks
Specifications
| Brand | MACROMATIC |
|---|
Questions about this item
What voltage supply and socket type are required for the TR-55121-10 relay to operate?
The relay needs a 240 V AC coil supply and an 8-pin octal socket for plug-in mounting.
Can the 10 A DPDT contacts switch loads on a legacy 30 V DC circuit?
Yes, the contacts are rated for 10 A at 30 V DC as well as 10 A at 240 V AC.
How can I verify the cycle-on timing is set correctly after wiring?
Apply power and measure the on/off cycle; the potentiometer adjusts the period between 1.8 seconds and 3 minutes.
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