Features
Input and output signal conditioning
2 x 4 channel type K thermocouple input with cold junction
compensation built in.
10 x 24vdc sinking logic inputs (1 used, enable)
8 x 24 Vdc logic sourcing outputs (1 used for external alarm indication)
0.4 A max.
1 x clean contact output (used for trip contact) 0.5 A max
¼ VGA graphic monochrome LCD backlit display
High quality PCC CPU processor
700 kB SRAM, 1,4 MB FlashPROM,
0.4 micro second instruction time (typical)
LED status indicators
24 vdc operation max 20 W
All inputs, outputs and power supply are protected.
Operating temperature 0-50 deg C. Storage –20 to +60 deg C
Weight approx. 2 kg
Functions
The device performs the temperature spread monitoring functions in accordance with Rolls Royce specification which is summarized as
Signal validation – discount faulty inputs and alarm
Calculate average of healthy thermocouples
Calculate deviation of individual from average
Alarm on deviation exceeding alarm setpoint
Trip on deviation exceeding trip set point or number of failed thermocouple
inputs exceeds set point
Display
Digital display of all inputs and outputs
Bar graph of deviation of all temperatures
Annunciation of alarm status
Commissioning mode to
force outputs
adjust setpoints
Options
RS232 and CAN bus interface configuration (note hardware is built in)
PCMCIA slot for storage, transfer and archiving of data.
additional inputs and outputs
Graphic trend display, archiving storage.
Ethernet comms