| Sales | Phone/Whatsapp | |
| Jim Pei | [email protected] | +86 18020776782 |
| Model Number | 1440-VLF02-01RA |
| Module supply voltage | 21.6–26.4 V DC |
| Maximum supply current | 300 mA |
| Typical supply current | 175 mA |
| Maximum heat production | 7 W |
| Typical heat production | 4 W |
| Measurement input channels | 2 |
| Transducer constant-voltage supply | -24 V DC |
| Transducer constant-current supply | 4.5 mA ±20% from 24 V supply |
| Measurement input voltage | 0 to ±20 V selectable; 40 V peak-to-peak maximum |
| Measurement input impedance | Greater than 100 kohms |
| Tachometer inputs | 1 |
| Tachometer input voltage | ±25 V; 50 V peak-to-peak maximum |
| Tachometer input impedance | 120 kohms minimum |
| Tachometer frequency range | 0.0167–20,000 Hz |
| Speed measurement range | 1–1,200,000 rpm |
| Pulses per revolution | 0 (disabled) to 50,000 |
| Maximum speed change rate | 500 Hz/s |
| Isolated analog outputs | 2 × 4–20 mA |
| Analog-output load | 300 ohms maximum |
| DeviceNet bit rates | 125 / 250 / 500 kbit/s |
| Serial configuration bit rate | 19,200 bit/s |
| A/D conversion resolution | 24 bit |
| Signal frequency range (absolute-shaft firmware) | 1–10,000 Hz |
| High-pass filter selections | 0.8 / 2 / 4 / 23.8 Hz |
| Low-pass filter adjustment | 600–4,000 Hz |
| Time waveform block sizes | 256 / 512 / 1,024 / 2,048 samples |
| Onboard relay | 1 DPDT relay, 2 Form C contacts |
| Agency relay rating, AC | 120 V AC at 0.5 A |
| Agency relay rating, DC | 110 V DC at 0.3 A; 30 V DC at 1 A |
| Relay time delay | 0–25.5 s, 100 ms increments |
| Operating temperature | -20 to +65 °C |
| Storage temperature | -40 to +85 °C |
| Relative humidity | 95% maximum, non-condensing |
| Minimum Order Quantity | 1 Piece |
| Price | Contact for Jim |
| Packaging Details | Original new Factory Sealed |
| Delivery Time | 3–7 Days |
| Payment Terms | T/T |
| Shipping Method | DHL / FedEx / UPS / TNT |
| Supply Ability | In stock |
Allen-Bradley 1440-VLF02-01RA is an XM-121 dynamic measurement module for machinery condition monitoring. It combines measurement inputs, a tachometer input and local relay capability. DeviceNet carries measurement and status information to a compatible host. The module uses a separate DC supply rather than DeviceNet bus power. Its installed firmware determines whether it operates as the original low-frequency module or the absolute-shaft configuration.
The 1440-VLF02-01RA can form part of an existing XM vibration monitoring installation. The absolute-shaft firmware combines shaft-relative and casing measurements for the corresponding monitoring task. Sensor wiring and configuration must suit the actual module firmware. The terminal base and any relay expansion are separate items to check in a quotation. This product is not an Allen-Bradley FLEX I/O module.
Collects dynamic sensor signals for a compatible XM condition monitoring system.
With the corresponding firmware, combines shaft-relative and casing vibration for absolute-shaft measurements.
Provides local alarm relay action and DeviceNet status for a configured monitoring installation.
Confirm whether the unit runs the original XM-121 low-frequency firmware or the XM-121A absolute-shaft firmware before ordering.
No. It is an XM measurement module and requires the corresponding XM installation components.
No. DeviceNet supplies communication only; the module requires independent power.
The quoted supply must identify the terminal base and any expansion relay separately.
Ask Jim for actual-item photographs, the stated condition and available inspection details. The quoted warranty is 12 months under the agreed terms.
Confirmed in-stock goods are dispatched immediately after payment is received. Courier and tracking information are supplied after shipment.
Germany – A Germany customer urgently needed a replacement for a discontinued automation component. After reviewing the product label, technical parameters, and application details, our engineers recommended a compatible alternative and provided photos and test videos before shipment. The alternative performed well, enhancing the customer's confidence in our technical capabilities and leading to multiple repeat orders.
India – An Indian customer still had doubts after initial online communication with us, so they visited our company in person for a face-to-face meeting and product inspection. This visit increased the customer's trust and led to the successful placement of their first order. Over the next few years, we completed multiple orders and established a stable, long-term partnership.
Malaysia – A Malaysia customer needed a specific automation component and compared products and services from several suppliers online. After nearly three weeks of careful consideration, our sincere communication, professional service, and reliable product quality won the customer's trust. After receiving the product and using it for several weeks without any problems, the customer gave us positive feedback and subsequently placed multiple orders.
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