power automation PA 8000 LW Series, Installation Instructions Manual, Page: 80 / 132

3.9.1 PAMIO boxes and modules
Fig. 52: PAMIO superbus schematic
1 control unit
2 PA superbus connection
3 PAMIO box with two analog axes modules
4 PA superbus connection
5 termination plug
6 max. chain length (14 PAMIO boxes/30 m (98 ft))
A PAMIO box consists of its housing, the PA superbus input and
output connectors as well as two plug-in-slots for I/O modules. PAMIO
boxes can be snapped onto DIN rails and plugged into each other side
by side or connected through optional cables. The last box carries a
termination plug.
Limited cable length
The limits for the I/O system are 31 I/O modules (1 internal 4AXLX
module, 2 internal 2416EL modules plus a maximum of 14 PAMIO
boxes). The maximum cable length from the control unit to the last
PAMIO box cannot exceed 30 m (98 ft). This has to be considered as
a maximum global length when several PAMIO boxes are placed at
different locations and connected with interconnection cables.
I/O modules can be mounted where needed, without requiring bus
couplers. Each PAMIO module has its own watchdog timer for the PA
superbus, temperature and voltage monitoring as well as corre-
sponding LED displays on the front side.
Scope of delivery (control unit)
The PAMIO modules listed below are not included in the control unit's
basic scope of delivery. They can be ordered from Power Automation
(see Ä Chapter 9 “Service and return process” on page 119).
Basic Description
PA 8000 LW CNC control unit
Design and function
25.09.2015 | 80