Building Automation
Industrial Automation
Power Automation & Safety
Bangladesh Distributor
Question
What is a substitute product for MM2T Delay Relays?
Answer
1.It depends on MM2T model. Refer to the following table.
| Operating method | Time-limit operation | ||||||
| Reset method | Self-reset | ||||||
| Output type | Time-limit | DPDT (Standard models) | DPDT (Model that cannot switch DC) | ||||
| Instantaneous | --- | ||||||
| External connections | Solder terminal | Screw terminal | 8-pin socket | Solder terminal | Screw terminal | 8-pin socket | |
| Model | MM2T | MM2TB | MM2TP | MM2XT | MM2XTB | MM2XTP | |
| (1) H3YN-2 + PYF08A + MM2 Relay | (2) H3YN-2 + PYF08A + MM2X Relay | ||||||
Note:The bottom row gives recommended substitute products or models with substitute functions. For details, see the following information.
2.There is no substitute product in column (1) because MM2T utilize the fluid characteristics of oil, which significantly differs in principle and construction with the current mainstream digital timers.
However, a substitute function can be created by using H3YN-2 Solid-state timers with relays such as MM2.
From the contact specifications, it is recommended that MM2 is used as the substitute product for MM2T, MM2B for MM2TB, and MM2P for MM2TP.
If the actual operating conditions satisfy H3YN-2 timers contact specifications, relays such as MM2 are not required. In this situation, H3CR-A8 Solid-state timers could be used. If 8PFA sockets are used as the sockets for MM2TP, Y92F-42 Adaptors can be used instead of H3CR-A8 Sockets, and no wiring will need to be changed.
3.There is no substitute product in column (2).
However, a substitute function can be created by using H3YN-2 with relays such as MM2X.
H3YN-2 must be used in ON-delay operation mode, and mounted using PYF08A Surface Mounting Sockets.
From the contact specifications, it is recommended that MM2X is used as the substitute product for MM2XT, MM2XB for MM2XTB, and MM2XP for MM2XTP.
4.General Comparison of MM2T and H3YN-2 + MM2
| Compared item | MM2T | H3YN-2 + MM2 |
| Supply voltage | 6, 12, 24, 50, 100, 200 VAC only 50, 60 Hz only 6, 12, 24, 48, 100, 200 VDC only | H3YN-2: 24, 100 to 120, 200 to 230 VAC only, 50/60 Hz common 12, 24, 48, 100 to 110, 125 VDC only MM2: 6, 12, 24, 50 VAC only, 50/60 Hz common 100/(110) VAC common, 200/(220) VAC common: excludes 50 Hz in parenthesis 6, 12, 24, 48, 125 VDC only, 100/110 common, 200/220 common |
| Time range | 3 settings: 2 s, 5 s, 10 s Special setting: 15 s | H3YN-2: 1 dial (1), 4 ranges (1s, 10 s, 1 min, 10 min), 1 multitimer |
| Contact rating Resistive load | Standard model MM2T, MM2TB: 220 VAC 15 A, 24 VDC 10 A MM2TP: 220 VAC 7.5 A, 24 VDC 5 A DC load switching model (X) MM2XT, MM2XTB: 110 VDC, 10 A MM2XTP: 110 VDC, 7 A | H3YN-2: 250 VAC 5 A, 24 VDC 5 A MM2Y: Same as for MM2T Delay Relay (as shown on left) |
Note:There are no H3YN-2 that operate at 6, 12, 50 VAC, or 6, 200 VDC. See whether H3CR-A can be used for 50 VAC, and H3FA Dip Timers for 6 VDC. The voltage will need to be stepped down with a transformer for the 6, 12 VAC, and with a DC/DC converter for the 200 VDC models.
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