Roberts Gorden NEMA 4 installation manual Typical External Diagrams

SECTION 4: TYPICAL EXTERNAL DIAGRAMS

SECTION 4: TYPICAL EXTERNAL DIAGRAMS

FIGURE 10: Central Controller Communication Equalization Wiring

All ULTRAVAC™ Central Controllers are shipped with a communication equalization cable

(P/N 10080450). The cable is supplied to equalize and balance the circuitry of the communications on the controller network that may be experiencing noise or transient voltage levels. Connect the communi- cation equalization cable as shown below to the first or the last controller on the data bus.

Shrinkwrap

Communications Circuit Equalizer Wiring (included, must be field installed)

	BLACK	BLACK	RED
RED

This connector will plug into the right set of RS-485 +/- terminals on this board as shown.

120 ohm resistor (included w/ P/N 100800450)

OUT IN G

RS232 DIRECT

+32 +5 G G	G	REF	-	+	REF	-	+	-	+	-	+	-	+	-	+
		OUT				IN			4		3		2		1
AUX POWER			RS485 COMM							METER INPUTS

RESET

OH CD RI

ADDRESS

					UNIVERSAL INPUTS							2			1
	8		7	6			5		4		3
-	+	-	+	-	+	-	+	-	+	-	+	-	+	-	+

Description	Part Number
Comms Equalization Cable	10080450

CPU

OUT 499 OHM

IN

OFF 10VDC

ON

4	-
	+
3	-
	+
2	-
	+
1	+ -

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