Description

The 3701/55 Emergency Shutdown Device, (ADAPT ESD) is a safety PLC

with a graphical logic programming interface and integrated overspeed detection.

ADAPT ESD is designed for emergency shutdown of rotating machinery such as

steam, gas, and hydro turbines, expanders, and other process equipment.

ADAPT ESD is a compact, standalone, triple-redundant, safety shutdown device

that is designed to meet a broad range of user scenarios and applications.

The design offers an electrical and mechanical package with attention toreliability

and availability as well as extensive self diagnostics and compliance to industry standards.

Inputs

Inputs to the system are processed using three CPU modules to provide

triple modular redundancy (TMR). Each CPU processing module processes

two unique speed input channels, for a total of six speed channels for

the system. The processing modules also monitor an array of 32 discrete (DI)

and process variable (PV) signal inputs. Twelve channels of this input signal

array may be configured either as discrete inputs or 4-20 mA analog inputs.

Remaining channels in the array are reserved for discrete input signals only.