Roberts Gorden UltraVac NEMA 4 User Manual
Page 21
SECTION 4: T
YPICAL
E
XTERNAL
D
IAGRAMS
15
SECTION 4: TYPICAL EXTERNAL DIAGRAMS
FIGURE 10: Central Controller Communication Equalization Wiring
+
-
1
+
-
2
+
-
4
+
-
3
+
-
5
+
-
6
+
-
7
+
-
8
+
-
+
-
REF
RS485 COMM
REF
+
-
1
+
-
2
+
-
3
+
-
4
METER INPUTS
UNIVERSAL INPUTS
IN
OUT
ADDRESS
RESET
10VDC
499 OHM
OFF
ON
OUT
IN
G
IN
OUT
G
G
G
+5
+32
AUX POWER
RS232 DIRECT
RI
CD
OH
CPU
+-
1
+-
2
+-
3
+-
4
Communications Circuit Equalizer Wiring
(included, must be field installed)
RED
BLACK
RED
BLACK
120 ohm resistor (included w/ P/N 100800450)
Shrinkwrap
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.
This connector will plug into the right set of
RS-485 +/- terminals on this board as shown.
Description
Part Number
Comms Equalization Cable
10080450