Watlow PC1X-F20, Руководство пользователя

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Wa t l o w P o w e r S e r i e s F e a t u r e s
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5 . 9
Retransmit
Retransmitting Output Load Current or
Load Power
The retransmit feature allows an output to
retransmit an analog signal that can serve as an
input variable for another device such as a chart
recorder to document system performance over time.
To use the retransmit feature a Power Series must
be equipped with heater diagnostics and a universal
retransmit board (P_ _ 1 - _ _ _ _ - _ 1 _ _).
Setup Page:
• Enter the Setup Page by holding ± ¬ for 2 seconds.
• When the display reads [algo] , press Î until [retr]
[`set] [`set]
is displayed. Press ® :
Select [`Cfg] to choose the type of output
retransmitted, mA [`nna] or volts [UOlt] .
Select [type] to choose the type of information
that will be retransmitted.
[nOne] retransmit not active.
[`CUr] retransmits the load current of
selected phase [phas] or zone [2one] if it is a
multizone unit.
[`HUa] retransmits the load power of selected
zone [2one] in all models.
Select phase [phas] or zone [2one] to choose the
phase/zone that will represent your retransmit
signal. A three phase unit can only be single zone.
To scale the retransmit output signal, set the low
value load current or kVA to be retransmitted with
[Cur_] or [HUa_] and set the high value load cur-
rent or kVA to be retransmitted with [Cur–] or
[HUa–] . For example, if you want 4-20mA to represent
a 50A to 250A current, set [Cur_] to 50 and [Cur–]
to 250. As the load current varies between 50 and
250A, the retransmit output will vary between 4mA
and 20mA.
Current outputs are hardware limited to 0 to 20mA,
but may be scaled using the
{rt|C_] and {rt|C–]
prompts.
Voltage outputs are hardware limited to 0 to 10V,
but may be scaled using the
{rt|U_] and {rt|U–]
prompts.
Figure 5.9a — Retransmitting a remote set point.
Figure 5.9b — Example circuit.
Power Series
Heater
CT
Recorder
Device
Retransmit
Circuit
Power Series