Communications - Qualitrol 509-200 Operation Manual

Communications

The output signals are accessed on Terminal Block TB2 terminals 1 through 8 for
the Enclosure and Panel Mount Units (see Figure 13) and TB2 terminals 9
through 16 for the Rack Mount Unit (see Figure 13a).
NOTE: ALL REMOTE OUTPUT SIGNALS ARE INDEPENDENT, VARIABLE
CURRENT LOOPS, DRIVEN BY SYSTEM POWER AND DESIGNED TO
DRIVE A RESISTIVE LOAD (I.E., CURRENT METER). THEY CANNOT
BE GROUNDED OR TIED TOGETHER.
Figure 13. Remote Output Signal Terminals
Figure 13a. Remote Output Signal Terminals for 19" Rack Mount unit
The transformer Monitor comes Equipped with digital communication
capabilities. A four wire RS-485 connection is located on the back of the unit see
Figures 14, 14a. If the operator is using a two wire RS-485 connection with the
509, short TXD+(B) with RXD+(B) and TXD-(A) with RXD-(A). Now connect
the two wire RS-485 as an A/B system. There is also a fiber optic connection
option. See Figure 15, 15a for the connection to this option. This option has
been tested using both the Black Box fiber optic modem line driver #ME540A-
ST and the Dymec line/repeater #5846-F-ST. The RS-485 connection may be
E l e c t r o n i c C o o l i n g M o n i t o r
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