Watlow Electric Revision 5 - Manual (Page 26)

21
ANAFAZE SYSTEM 32 connections for a single unit are as follows:
Black Box
COMPUTER LD485A SYSTEM 32
+485 Output (Start bit +5v) TXA RX+ #3
-485 Output (Start bit 0v) TXB RX- #4
+485 Input RXA TX+ #1
-485 Input RXB TX- #2
Shield-------Earth Ground---------Shield Do not Ground
Note: Connect the shields to earth ground only at the computer or other 485
interface. No shield connection is required at the SYSTEM 32. Connect a 200
ohm terminating resistor between RX- and RX+ at the SYSTEM 32.
For multiple units connect the system as follows:
Black Box SYSTEM 32 SYSTEM 32
LD485A [1] [n]
TXA RX+ #3 RX+ #3 ---|
200 ohms
TXB RX- #4 RX- #4 ---|
Ground
RXB TX+ #1 TX+ #1
RXA TX- #2 TX- #2
Ground