Rockwell Automation 1785-Vx0B, D17856.5.9 PLC-5 VME VMEbus Programmable Controllers User Manual - Manual (Page 31)

Chapter 2
Installation
2-9
If your remote I/O link: The maximum number of
racks you can scan on
the link The maximum number of
physical devices you
can connect on the link Use this resistor rating:
contains any device listed in Table 2.A 150 W 16 16
operates at 57.6 kbps or 115.2 kbps, and you do
not require the link to support more than 16
physical devices.
As shown in the table above, the terminators you use determine how many
devices you can connect on a single remote I/O link.
Table 2.A
I/O Link Devices that Require 150-
W Termination Resistors
Device Type Catalog Number Series
Scanners 1771-SN
1 2 SD SD2 All
1772-SD, -SD2
1775-SR
1775-SR
1775-S4A, -S4B
1775 S4A, S4B
6008-SQH1, -SQH2
Adapters 1771-AS
1771-ASB A
Miscellaneous 1771-AF All
1771-DCM
Figure 2.3
Terminating a Remote I/O Link Using a Resistor
1
2
150 Ω
or
82
Ω
Blue
Shield
Clear
Blue
Shield
Clear
Blue
Shield
Clear
To
I/O adapter
19334
PLC-5/VME processor or remote I/O adapter module
as the last device on an remote I/O link.
Another I/O link device