Control Specifications - WEST P8700 User Manual

Linear DC:
Transmitter Power
Supply:
see Linear output
*
spec for 0-10V PSU

Control Specifications

Automatic Tuning Types:
Proportional Bands:
Automatic Reset
(Integral Time Constant):
Rate
(Derivative Time Constant):
Manual Reset
(Bias):
Deadband/Overlap:
ON/OFF Differential:
Auto/Manual Control:
Cycle Times:
Setpoint Range:
Setpoint Maximum:
Setpoint Minimum:
Setpoint Ramp:
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Resolution:
Update Rate:
Ranges:
Load Impedance:
Accuracy:
When used as control output:
Isolation:
Use as 0 to 10VDC transmitter
power supply*
Power Rating
Isolation:
Pre-Tune, Self-Tune.
0 (OFF), 0.5% to 999.9% of input span at 0.1% increments.
1s to 99min 59s and OFF.
0 (OFF) to 99 min 59 s.
Added each control algorithm execution. Adjustable in the
range 0 to 100% of output power (single output) or -100% to
+100% of output power (dual output).
-20% to +20% of Proportional Band 1 + Proportional Band 2.
0.1% to 10.0% of input span.
User-selectable with "bumpless" transfer into and out of
Manual Control.
Selectable from 0.5s to 512 seconds in binary steps.
Limited by Setpoint Upper Limit and Setpoint Lower Limit.
Limited by Setpoint and Scale Range Upper Limit.
Limited by Scale Range Lower Limit and Setpoint.
Ramp rate selectable 1 to 9999 LSD's per hour and infinite.
Number displayed is decimal-point-aligned with display.
Specifications
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Eight bits in 250mS
(10 bits in 1 second typical, >10 bits in
>1 second typical).
Every control algorithm execution.
0 to 10V
0 to 5V
2 to 10V
0 to 20mA & 4 to 20mA:
500Ω maximum.
0 to 5V, 0 to 10V & 2 to 10V:
500Ω minimum.
Short circuit protected.
±0.25% (mA @ 250Ω, V @ 2kΩ).
Degrades linearly to ±0.5% for
increasing burden (to specification
limits).
For 4 to 20mA and 2 to 10V a 2%
over/underdrive is applied (3.68 to
20.32mA and 1.84 to 10.16V).
Reinforced safety isolation from inputs
and other outputs.
Adjustable, 0.0 to 10.0V (regulated)
output into 500Ω minimum.
20 to 28VDC (24V nominal) into 910Ω
minimum resistance.
Reinforced safety isolation from inputs
and other outputs.
0 to 20mA
4 to 20mA
(default)
59305, Issue 5 – March 2005