Despatch MIC1422 Controller - Manual (Page 77)

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APPENDIX D: SPECIFICATIONS
Input Specifications
General
Input Sample Rate:
Four per second
Input Resolution: 14 bits approximately
Input Impedance: Greater than 100M ohm resistive (except for
DC mA and V inputs)
Isolation: Universal input isolated from all outputs except
SSR at 240 VAC
Thermocouple Inputs
Thermocouple Types:
R, S, J, T, K, L, B and N
Note: Thermocouple must not be grounded! Damage to
the cold junction in the control will result!
Calibration: Complies with BS 4937, NBS125 and IEC584.
Sensor Break Protection: Break detected within 2 seconds. Control outputs set to OFF
(0% power); alarms operate as if the process variable has
gone over-range.
RTD and DC mV Inputs
Type and Connection:
Three-wire Pt100
Calibration: Complies with BS1904 and DIN43760.
Lead Compensation: Automatic
RTD Sensor Current: 200 mA (approximately)
Sensor Break Protection: Break detected within 2 seconds. Control outputs set to OFF
(0% power); alarms operate as if the process variable has
gone under-range.
DC mA and DC V Inputs
Scale Range Maximum:
-1999 to 9999
Scale Range Minimum: -1999 to 9999
Minimum Span: 1 display LSD
Sensor Break Protection: Applicable to 4-20 mA, 1-5V, and 2-10V ranges only. Break
detected within 2 seconds. Control outputs set to OFF (0%
power); alarms operate as if the process variable has gone
under-range.