
| DIN RAIL | FIELD TERMINALS | 1440-TB-A | XM MODULE | SIDE BUS |
The 1440-TB-A is the XM-940 terminal base used beneath compatible XM dynamic measurement modules. It provides the DIN-rail mounting platform, field terminals and side-bus interconnection needed for power, communication and expansion circuits.
| Manufacturer | Allen-Bradley |
| Catalog number | 1440-TB-A |
| Product name | XM-940 terminal base |
| Primary module match | XM-124 / 1440-SDM02-01RA |
| Mounting method | 35 mm DIN rail |
| Keyswitch position | Position 1 for XM-12X modules |
| Operating temperature | -20 to +65 deg C |
| Storage temperature | -40 to +85 deg C |
| Relative humidity | 95% noncondensing |
| Approximate dimensions | 97 x 94 x 94 mm |
| Approximate weight | 0.172 kg |
| Terminal screw torque | 0.8 N m |
| Side-connector power path | 3 A maximum |
| DeviceNet power path | 300 mA maximum |
| Minimum nearby clearance | 25.4 mm |
| FIELD SENSOR / RELAY WIRING | → | 1440-TB-A TERMINALS | → | XM-124 MODULE | → | SIDE CONNECTOR / XM BUS | → | ADJACENT XM ASSEMBLY |
| MODEL | ROLE | SELECTION POINT |
| 1440-TB-A | XM-124 terminal base | This model |
| 1440-TB-B | XM-220 terminal base | Different supported module |
| 1440-TB-D | XM-441 terminal base | Expansion relay application |
| 1440-TB-G | XM-442 terminal base | Voted EODS relay application |
| 1440-TBS-J | XM DYN terminal base | Different dynamic module family |
| 01 | Mount the base securely on a 35 mm DIN rail and maintain the required clearance. |
| 02 | Set the keyswitch before wiring and do not change it after conductors are landed. |
| 03 | Push the side connector fully into position before seating the measurement module. |
| 04 | Tighten terminal screws to 0.8 N m and connect all grounds to the same grounding electrode system. |
| 05 | After assembly, verify module latch, connector engagement, supply polarity, sensor wiring and network communication. |
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QUALITY-FOCUSED SUPPLY
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URGENT INTERNATIONAL DISPATCH
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EXPERIENCED PART SUPPORT
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| 01 |
1440-TB-A: Can 1440-TB-A be used with every XM module?
No. Terminal-base selection is module-specific; verify the exact XM module before wiring.
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| 02 |
1440-TB-A: Does 1440-TB-A perform vibration measurement by itself?
No. It is the mounting and wiring base; the compatible XM measurement module performs signal processing.
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| 03 |
1440-TB-A: What keyswitch position is required with XM-12X modules?
Position 1 is required, and the position should not be changed after wiring.
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| 04 |
1440-TB-A: Can the measurement module be fitted before field wiring?
The base is normally wired first, then the compatible module is aligned and seated evenly.
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| 05 |
1440-TB-A: What should be checked when replacing 1440-TB-A?
Check module match, keyswitch, side connector, terminal assignments, grounding, torque and the condition of all pins and latches.
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