Despatch MIC1422 Controller - Manual (Page 81)

77
DC
Resolution:
Eight bits in 250 mS (10 bits in 1 second typical, >10 bits in
>1 second typical).
Update Rate: Four times per second
Ranges: 0-20 mA, 4-20 mA, 0-10 V, and 0-5 V
NOTE: Changes between V and mA ranges also require jumper movement.
Load Impedance: 0 - 20 mA: 500 ohm maximum
4 - 20 mA: 500 ohm maximum
0 - 10 V:
500 ohm minimum
0 - 5V: 500 ohm minimum
Isolation: Isolated from all other inputs and outputs.
Transmitter Power Supply Rating: 24 VDC, 20 mA maximum
Control Specifications
Control Types:
RaPID, PID, PID/On-OFF2, ON-OFF
Automatic Tuning
Types:
Pre-Tune and Auto-Tune
Proportional Bands: 0 (OFF), 0.5% - 999.9% of input span @ 0.1% increments
Auto Reset: 1 s - 99 min 59 s/repeat and OFF
Rate: O (OFF) - 99 min 59 s
Manual Reset: Adjustable in the range 0-100% of output power (single
output) or -100% to +100% of output power(dual output)
Deadband/Overlap: -20% to +20% of proportional band 1 + proportional band 2
ON/OFF Hysteresis: 0.1% to 10.0% of input span
Auto/Manual Control: User-selectable with "bumpless" transfer into and out
of Manual control.
Cycle Times: Selectable for 0.5s to 512s in binary steps
Setpoint Range: Limited by Setpoint Upper and Setpoint Lower limits
Setpoint Maximum: Limited by Setpoint and Range Upper Limits
Setpoint Minimum: Limited by Range and Setpoint Lower Limits
Setpoint Ramp: Ramp rate selectable 1-9999 LSDs per hour and infinite.
Number displayed is decimal point aligned with selected
range.