Installation manual

SECTION 4: TYPICAL EXTERNAL DIAGRAMS
15
SECTION 4: TYPICAL EXTERNAL DIAGRAMS
FIGURE 11: Central Controller Communication Equalization Wiring
RS-485
+
-
+
-
+
-
+
-
REF
-+-+
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+5
+16
GND
8 7 6 5 4 3 2 1
RED
BLACK
Communications Circuit Equalizer Wiring
(included, must be field installed)
1
2
3
4
Shrinkwrap
120 ohm resistor
Red
Black
All UltraVac™ Central Controllers are shipped with a communication equalization cable (P/N
10080450), satellite controllers do not use the cable. 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 communication equalization cable as shown below.
This connector will plug into the right set of
RS-485 +/- terminals on this board as shown.
Description Part Number
Comms Equalization Cable 10080450