Despatch MIC1422 Controller - Manual (Page 78)

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Dual Setpoint Selection Input
Type:
Voltage free or TTL compatible
Voltage Free Operations: Connections to contacts of external switch or relay; contacts
open equal Setpoint 1 selected (minimum contact resistance
= 5K ohms), contacts closed equal setpoint 2 selected
(maximum contact resistance = 50 ohms)
TTL Levels:
To select Setpoint 1: -0.6V to 0.8V
To select Setpoint 2: 2.0V to 24V
Remote Setpoint/Potentiometer Input
Types available:
4 - 20 mA, 0 - 20 mA
0 - 100 mV, 0 - 50 mV, 10 - 50 mV
0 - 10V, 2 - 10V, 0 - 5V, 1 - 5V
Potentiometer (up to 2K ohms)
Measurement accuracy under
reference conditions: +/- 0.25% of input span +/- 1 LSD
Input sample rate: Four per second
Input resolution: 13 bits
Isolation: 240V ac isolation from all other outputs and inputs except
Remote Setpoint Select
Sensor Break protection: For 4 - 20 mA and 1 - 5 ranges only
Remote Setpoint Scale Max.: -1999 to 9999, decimal point as for universal input
Remote Setpoint Scale Min.: -1999 to 9999, decimal point as for universal input
Remote Setpoint Offset: -1999 to 9999, decimal point as for universal input
Remote Setpoint Select Input
Type:
Voltage free contact and TTL comparable. Selects
Local/Remote Setpoint (or Setpoint 1/Setpoint 2, if Dual
Setpoint operation is selected)
To Select Remote Setpoint/
Setpoint 2:
Maximum resistance (closure): 50 ohms
Maximum voltage (TTL) for "0": 0.8 (1 mA sink)
Minimum voltage for "0":
-0.6V