Bently Nevada Typical (and recommended) applications of the ADAPT ESD

3701 ADAPT ESD Overview

Typical (and recommended) applications of the ADAPT ESD will use a triple modular

redundant architecture. In this configuration, each processor module physically

connects to an array of 32 input channels, 12 of which are configurable as discrete

inputs or 4-20 mA analog inputs, as well as two speed inputs. The Bently Nevada

Monitor Configuration software allows you to configure large combinations of

logic blocks in order to manage the system trip logic. This logic dictates how the

trip mechanisms for the system are driven.

The ADAPT ESD system can drive 12 independent trip relays. Of the 12 relays,

six of these signals can optionally be configured for two-out-of-three, (2oo3), voting.

In the 2oo3 arrangement, the system activates a relay only when any two of the three

CPU modules drive to trip. In independent mode, or one-out-of-one voting, any single

CPU that drives to trip will cause an assigned relay to activate on the corresponding

output card. For the highest safety, the system should be configured in “de energize

to trip”, or “normally energized” mode so that loss of power will not result in a machine

running unmonitored.

ADAPT ESD Processing Module (CPU)

The ADAPT ESD system has three CPU modules. The CPU (part number 323174-01) is a

state-of the-art, high-performance CPU module. All three CPU modules process all 32

discrete inputs and 12 analog inputs. Each individual CPU module processes two speed

inputs, for a total of six speed inputs. The CPU module features redundant Ethernet

connections. The CPU receives trip logic configuration from the Bently Nevada Monitor

Configuration software. The trip logic can have up to 500 logic steps.

The input-to-output decision time is optimized to provide 2ms nominal logic processing

time and 8ms relay toggle time in order to minimize the overall duration between detection

of an emergency condition and successful shutdown. All embedded code on the CPU is

capable of being upgraded without disassembly of the system.