AnyWireASLINK
4-2
4.2 Slave units
Types of slave units
Slave units for the AnyWireASLINK system shall be used for this machine.
There are the following types of slave units.
Unit type
Slave
I/O terminal
ASLINK terminals and the like
Analog terminal
Analog input unit and the like
Sensor/amplifier
ASLINK sensor and the like
Other hardware
Small display unit and the like
As for the specific names and models of slave units, refer to the separate AnyWireASLINK system
catalogue.
Number of slave units connected
The maximum number of slave units that can be connected to one line of the AnyWireASLINK system
is up to 128 units.
(It is necessary that the following two conditions are simultaneously satisfied: The total number of
points occupied by the slave units does not exceed the maximum number of transmission I/O points,
and the total current consumption for the transmission lines does not exceed the maximum allowable
supply current.)
Connection of slave units
There are roughly two types of methods for connection of AnyWireASLINK slave units.
One is
“2-wire (non-insulated) type” and the other is “4-wire (insulated) type.”
Classification
Operation
2-wire (non-insulated)
type
Slave units and connected loads are driven by two transmission lines.
4-wire (insulated) type
Two of the transmission lines drive the transceiver section only while
slave units and connected loads are driven by two external power supply
lines.
This connection method shall be selected if the allowable supply current
for the 2-wire transmission line is insufficient or to isolate the transmission
line from the power supply system for the loads.
Any combination of these two connection methods, 2-wire only, 4-wire only or combination of 2- and
4-wire systems, may be used.
The selection of the 2-wire or 4-wire system depends on the slave units used.
