7DI439.7 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 7DI439.7 is part of the System 2003 Controllers series and features 16 inputs with a rated voltage of 24 VDC. This module has IP20 protection, a power consumption of 0.4 W, and requires 3 terminal blocks for wiring as sink or source. It occupies 2 logical module slots and includes channel to PLC isolation, with a hardware filter response time of less than or equal to 1 ms.
Internal Product Review
The 7DI439.7 is a B & R Automation System 2003 digital input module with 16 inputs and a 24 VDC rated voltage. Channel-to-PLC isolation and a ≤1 ms hardware filter support dependable signal handling in fast industrial control tasks. Low 0.4 W power consumption makes the module an efficient choice for I/O expansion.
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Product Description:
B & R Automation manufactures the 7DI439.7 digital input module as part of the System 2003 Controllers series. The unit converts 24 V field signals into logic levels for the processor and is installed on the rack in a single-width housing. Because its terminals accept sink or source wiring methods, the same module can support sensors that either supply or draw current. The module is intended for rack-based control systems that need straightforward status acquisition from switches, sensors, and auxiliary contacts. Its compact format is useful in cabinets with limited rail space or tightly grouped control hardware.
It presents 16 digital input channels that share a common supply, and channel-to-PLC isolation is provided by optocouplers rather than channel-to-channel isolation. A hardware filter of ≤1 ms suppresses bounce, and no software filter is applied. The module occupies 2 logical slots in the backplane map and draws only 0.4 W from the internal 5 V rail, which helps limit heat buildup in dense racks. The input circuitry is referenced to a nominal 24 VDC and remains functional between 18 VDC minimum and 30 VDC maximum for the System 2003 power domain. That combination suits installations where quick input response matters, such as reading limit switches, photoeyes, and contact outputs from machine devices.
The housing has an IP20 rating, so it is intended for mounting inside an enclosed panel. Field conductors connect through 3 removable terminal blocks, which simplifies service without disturbing adjacent modules. The input comparator recognizes a high state above 15 V and a low state below 5 V, giving generous noise margin for long cable runs. This threshold spacing helps the module tolerate typical electrical noise on extended field wiring while preserving prompt signal transfer to the CPU. Removable wiring blocks also let the module be disconnected from field cabling during panel work without moving neighboring modules on the rack.
