3-Wire RTD (except 10 ±5 °C (±9 °F) maximum for thermocouple measurements below –100 °C (-148 °F)

Relays

Relay Logic The 1900/65A monitor has six relay outputs that users can program to open or close contacts according to user- defined logic statements. Logic statements use the OK, Alert and Danger statuses of any channel, or combination of channels as inputs. Cu): ±1.5 °C (±2.7 °F) + 0.5 % full scale 3-Wire RTD 10 Cu: AND (bypassed channels ignored) ±3 °C (±5.4 °F) + 0.5 % full scale True AND (bypassed channels included) 2-wire RTD Types: Logical Operators OR Input Impedance 2-wire RTDs have additional errors due to field wire resistance and variations in the field wire resistance due to changes in ambient temperature. Logical Operands Thermocouple Inputs: Monitor inhibit Monitor Not OK >1 M Monitor Danger Monitor Alert

Alarm Status Time Delays

Channel Not OK Position / Vibration Inputs Channel Danger Minimum Channel Alert 0.1 second Variable Danger Maximum Variable Alert 60 seconds Maximum Operands Adjustment Resolution Minimum 50 per relay 0.1 second 1 second Relay Configuration Temperature / Speed Inputs Maximum The following configuration options are independent of the relay logic and can be configured for each relay: Latching or non-latching independent of alarm status 60 seconds Adjustment Resolution Normally energized or normally de-energized 0.1 second Normally open and normally closed via contacts
Specifications and Ordering Information Part Number 173401-01 Rev. E (04/07) Page 8 of 20