Chapter 3 – Installation
3-4 ACS/ACH 400 Direct N2 Bus Interface
As always, the grounding wires should not
make any closed loops, and all the devices
should be grounded into common ground.
The N2 Bus must be terminated using 120 W
resistors at both ends of the network. These
resistors are already resident on the ACS/ACH
400 board. To connect the termination
resistors, move jumpers on the switch box J1
on the control interface board to the terminate
position. Figure 3-2 “RS-485 termination
switches” shows the position of the termination
switches.
Figure:3-2 RS-485 termination switches
The termination should not be done on the
intermediate stations on the network.
Figure:3-3 Termination for the link
Terminated Not terminated
ON ON
ON ON
Terminated Terminate
To Next Page
Loading...
