About the D4-454
D4-454 is a VAC I/O module developed by Automation Direct. A member of the DirectLogic 405 series, this module is designed to interface with DL405 programmable logic controllers. This module can also communicate with a number of other modules and peripheral devices.
Power terminal connections under the front covers of the CPU Unit D4-454 are as follows:
- Run Relay
- 24VDC Auxiliary Power
- Logic Ground
- Chassis Ground
- AC Power
- 120/240 Voltage Select
The D4-454 CPUs have an LED indicator that flashes when the battery voltage is low. The typical battery life under the proper conditions is five years.
Operators generally use DirectSOFT6 Programming software. This can be found on the manufacturer's website and can be installed on a personal computer to program and monitor the PLC. Three ports on the D4-454 can be used to connect the necessary cables.
The D4-454 model is considered the successor to the D4-430, D4-440, and D4-450 CPUs due to the enhanced microprocessor technology. Due to the enhanced technology, the D4-454 model is considered the primary CPU choice for use in the DirectLogic 405 line.
The D4-454 model supports floating-point math technology. The floating-point math technology allows this module to compute full trigonometric functions, as well as an abundance of integer/floating-point number conversions.