Thermcraft XST-3-0-36-3V User Manual
Page 143
Installation and Operation Handbook
Technical Specification
2408 and 2404 Controller
C-1
TECHNICAL SPECIFICATION
Main Process Value Input and Second DC Input
Low level range
+100mV
High level range
0 to 10Vdc or 0-20mA with external 2.49
Ω current shunt. All
configurable between limits
Sample Rate
9Hz (110mS)
Resolution
<2
μV for low level range, <0.2mV for high level range, with default
input filter time constant of 1.6 seconds.
Linearity
Better than 0.2
o
C
Calibration accuracy
The greater of 0.25% of reading or + 1
o
C or +1LSD
User calibration
Low and high offsets can be applied
Input filter
Off to 999.9 secs Default 1.6 seconds.
Thermocouple types
Refer to the ordering code sensor input table
Cold junction
compensation
>30 to 1 rejection of ambient temperature changes in automatic
mode. Uses INSTANT ACCURACY
TM
cold junction sensing
technology to eliminate warm up drift and to respond quickly to
ambient temperature changes.
External references 0, 45, and 50
o
C
RTD/PT100 input
3-wire, Pt100 DIN43750. Bulb current 0.3mA. Up to 22
Ω in each
lead without error
Potentiometer input
100 to 15Kohm
Analogue input
functions
Process value, remote setpoint, setpoint trim, external power limit,
feedforward input,, valve position feedback
Second process value
input functions
Select min, select max, derived value, transfer to 2
nd
PV
Digital inputs
Isolated except for fixed digital inputs 1 & 2
Contact closure
inputs
Open circuit voltage: 24 to 30 Vdc
Short circuit current: 24 to 29mA
Off state: < 100 ohms input resistance
On state: > 28Kohm input resistance
Logic inputs
(current sinking)
Off state: -3 to 5Vdc @ <-0.4mA
On state: 10.8 to 30Vdc @ 2.5mA
Digital input
functions
Refer to the ordering code
Digital Outputs
Relay rating
Min: 12V, 100mAdc. Max:2A, 264Vac resistive
Single logic output
18Vdc, 20mA. This output is not isolated from the main process
value input
Triple logic output
12Vdc, 8mA per channel (isolated)
Digital o/p functions
As per the ordering code
High current output
10Amp, 264Vac resistive. This option is not available on controller
from Jan-04
Triac rating
1A, 30 to 264Vac resistive (isolated)