Watlow Electric Revision 5 Benutzerhandbuch

Seite von 71
28
5.9 DIAGRAMS OF TYPICAL INPUTS
SEE SECTION 5.6 FOR DETAILED INFORMATION.
Typical Thermocouple
AUX  O
HIGH O-- + White -------------------------       Type J T/C
LOW  O-- - Red ----------------------------
SHLD O
Shielded Thermocouple:  To use shield remove jumper RD.  Shield should be
grounded at probe [see 5.6.2].
AUX  O              ---------------------
HIGH O-- + Yellow -------------------------       Type K T/C
LOW  O-- - Red ------------------------------
SHLD O--------------------------------------
DC Voltage Input:  Use scaling resistors to reduce the full scale voltage to 0 to
60mv.  SEE SECTION 5.6.3 FOR SCALING RESISTORS VALUES OF RA
AND RB.
AUX  O------------  +                                AUX  O
HIGHO    DC VOLTAGE ABOVE         HIGH O-------------  +
LOW  O------------  - 60mv                       LOW  O-------------  - 60mv
SHLD 0                                                     SHLD O     DC VOLTAGE BELOW
Current Transmitter Inputs:  Use scaling resistors to convert the current to a
voltage input scaled to 0 to 60mv.  This will result in a 0 to 20ma full scale range,
and an Mx + B scaling can be in the computer to display the engineering units.
SEE SECTION 5.6.5 FOR SCALING VALUES OF RA, RB, AND RC.
SCALING RESISTORS MUST BE INSTALLED.
AUX  O------------- +
HIGH O                DC CURRENT INPUTS
LOW  O------------- -
SHLD O
RTD INPUTS: The input loop must be configured for the three wire RTD input
and must have the proper scaling resistors installed.
AUX  O-------------
HIGH O-------------       RTD
LOW  O-------------
SHLD O-------------