The Bently Nevada 3500/61 Temperature Monitor provides six channels of temperature monitoring and
accept both Resistance Temperature Detector (RTD) and Thermocouple (TC) temperature inputs. The modules condition
these inputs and compare them against user-programmable alarm setpoints. The 3500/61 provide identical
functionality except that the 3500/61 provides recorder outputs for each of its six channels.
The user programs the modules to perform either RTD or TC temperature measurements using the 3500 Rack Configuration
Software. Different I/O modules are available in RTD/TC non-isolated or TC isolated versions. The user can configure
the RTD/TC non-isolated version to accept either TC or RTD, or a mixture of TC and RTD inputs. The TC isolated version
provides 250 Vdc of channel-to-channel isolation to protect against external interference.
When used in a Triple Modular Redundant (TMR) configuration, temperature monitors must be installed adjacent to each other
in groups of three. When used in this configuration, the system employs two types of voting to ensure accurate operation
and to avoid single-point failures.
