Chapter 1: Introduction 3
Self Diagnostics
When placed in the Run mode, the D50 PLC performs startup self-diagnostics and error-checking on
the processor, control program, and I/O system. Error status information is stored internally, providing
for quick and easy troubleshooting of system and programming errors.
Large Program Memory
Sufficient program capacity is furnished for even the most demanding applications. Internal program
memory handles up to 2048 separate control steps.
Integrated 700mA Power Supply
The AC-powered D50 PLC controller provides up to 700mA of 24VDC output power. This can
eliminate the need for an additional power supply for standard 24VDC control power requirements.
Battery-Free Program Backup
An EEPROM is used to provide battery-free permanent program and data storage.
I/O Module Support
The D50 PLC I/O expansion module line includes complete coverage of all major standard I/O
requirements. Digital inputs can be of 24 VDC or 115 VAC type, while digital outputs can be 24 VDC
transistor, 115VAC SSR, or relay type. Analog support is available for voltage and current A/D and
D/A.
Peripheral Support
The D50 PLC has two program loader software packages available for use on standard PCs: the DOS-
based GPC5, and the Windows-based WinGPC. These packages provide advanced programming,
monitoring, editing, and troubleshooting for the D50 PLC. A dedicated hand-held programmer is also
available for harsh environments. Cutler-Hammer also offers a complete line of Operator Interface
products and HMI software packages compatible with the D50 PLC.
Note: When this manual uses the term GPC, either GPC5 or WinGPC can be used.
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