Precision Digital PD570 - Manual (Page 39)

To prevent electric shock, be sure to turn off power to the Nova Controller and the source circuit
breaker before wiring. !
CAUTION
7.11 Communication Wiring (RS-485)
„ Up to 31 slave controllers (Nova series controllers equipped with the RS-485 serial communication
option) can be connected.
„ Be sure to connect terminating resistors (220 Ω, 1/4 W) to slave and master controllers at
communication channel ends as shown above.
Master Station NOVA Controller
Terminating Resistor
SHIELD
RTX+
RTX+ RTX+
RTX- RTX- RTX-
SG
SG SG
Terminating Resistor
NOVA Controller
PD570 Series Nova Process and Temperature Limit Controller Instruction Manual
39