The Allen-Bradley 1440-REX00-04RD relay module serves as a versatile XM-441 expansion solution. Specifically, it integrates seamlessly with any host XM measurement module or the XM-440 master relay unit. Therefore, users gain four extra relays for alarm wiring or triggering specific actions. Consequently, this module transforms data into tangible control outputs.
First, the 1440-REX00-04RD houses four independent DPDT relays. Each relay offers two sets of Form C contacts. Additionally, these contacts handle up to 250V AC at 50/60 Hz with a resistive load of 3A. Meanwhile, the module supports two fail-safe modes: normally energized or normally de-energized. Furthermore, its ESD immunity stands at 4 kV for contact discharges and 8 kV for air discharges, ensuring durability in harsh electrical environments.
The host module manages all relay functions, including latching, time delay, logic, reset, and activation. Thus, the XM-441 expansion card operates intelligently without standalone programming. For power, it requires a 24V DC supply with a maximum current draw of only 0.2A. Moreover, its power dissipation is a mere 2.9 W (9.9 BTU/hour), which minimizes heat buildup.
The module measures approximately 97 x 94 x 94 mm (3.8 x 3.7 x 3.7 inches). However, due to its open-type construction, it must be installed inside a protective enclosure. This precaution shields the PCB from high temperatures, humidity, dust, and direct sunlight. Besides that, proper ventilation is usually sufficient, although forced cooling may be necessary if other high-heat components share the cabinet.
For optimal performance, follow these wiring practices. Specifically, use shielded cables for all signal connections to prevent harmonics and external noise from causing false relay activations. In contrast, power and relay connections can utilize unshielded wiring. Additionally, ensure the host module firmware supports the 1440-REX00-04RD for full functionality. Finally, mount the unit securely within the enclosure, maintaining adequate clearance for airflow.
Your shipment includes the following items:
One Allen-Bradley 1440-REX00-04RD XM-441 relay module
Installation instructions (quick-start guide)
Necessary mounting hardware
Moreover, we ship all orders via reliable carriers such as FedEx, UPS, or DHL. Consequently, you can expect prompt and tracked delivery worldwide.
Can the 1440-REX00-04RD work with any XM module?
Yes, it adds four relays to any XM measurement module or to the XM-440 master relay module seamlessly.
What is the maximum switching capacity of each relay?
Each DPDT relay is rated for 250V AC at 50/60 Hz and 3A resistive, making it suitable for many industrial loads.
Is external cooling required for this expansion module?
Typically, forced ventilation suffices due to its low 2.9W dissipation. However, assess overall cabinet heat load.
Can I configure fail-safe behavior for each relay individually?
Absolutely. The host module allows you to set each relay as normally energized (fail-safe) or normally de-energized.
What type of cable should I use for signal connections?
Always employ shielded cables for signal wiring to avoid noise-induced false triggering of the XM-441 relays.
| Brand Name | |
| Model No. | 1440-REX00-04RD |
| Product Type | Expansion Relay Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
