Swann AMI Phosphate-II Operator's Manual page 30

AMI Phosphate-II
Installation
28
ATTENTION
Heavy inductive or directly
controlled loads (solenoid
valves, dosing pumps)
must be switched by
external power relays. In
this case, use the AMI
relaybox which is available
as an option.
Small inductive loads
(max 0.1A) as for example
the coil of a power relay
can be switched directly.
To avoid noise voltage in the AMI it is mandatory to connect an
snubber circuit in parallel to the load (this procedure is not
necessary if a AMI relay box is used)
Resistive loads (max. 1A) and
control signals for PLC, impulse
pumps and so on can be connected
without further measures.
Actuators, like motor valves, are
using both relays: One relay
contact is used for opening, the
other for closing the valve, i.e.
with the 2 relay contacts
available, only one motor valve
can be controlled.
Motors with loads bigger than
0.1A must be controlled via
external power relays or an AMI
relaybox.
A-96.250.641 / 290312