Schneider Electric PC-E984-685 Programmable Logic Controller Module

The Schneider Electric PC-E984-685 Programmable Logic Controller Module is a slot-mount CPU/Power Supply unit in the Modicon 984 Series, designed for mid-range to large automation tasks and to consolidate controller logic and power in a single module. It includes a built-in power supply with 115/230 VAC input at 50/60 Hz and provides 24 VDC logic power, along with 16K of user memory and 10K of data memory for handling sizable programs. For communications, the module offers two Modbus ports and one Modbus Plus port to connect field devices and networks, enabling scalable control architectures, and the 685E-class CPU delivers fast execution—reported in the range of 1–2.5 ms—with support for configurations up to about 1,000 nodes. This model is listed as discontinued by Schneider Electric, and the hardware weight is typically around 3 lb.