MAC is an eight-channel amplifier - interface consisting of eight independent
tension amplifiers on a single circuit card.
The MAC provides excitation voltage to connected tension transducer pairs,
and puts out a 0-to-10Vdc signal proportional to tension for each pair
of transducer signal inputs. The 0-to-10V outputs can be used as inputs
to drives, PLC's or other tension monitoring or closed-loop tension control
devices. Damped 0 - 1mA outputs are also available to drive tension meters.
The 5.5" x 7" MAC Card installs flat in the machine's control
panel. All external connections are by terminal strips.
Designed initially for the printing industry, the
MAC MultiAmplifier card helps reduce and eliminate
the incidence of web breaks on running presses. The MAC also performs
well in any application where process web tension needs to be monitored
from multiple locations. The TLS (tension limit switch) option allows
high and low alarm trip points to be set that warn the press operator
if running tension in a particular zone moves outside set operating limits.
The advantages of the MAC MultiAmplifier Card when
compared to single channel amplifier/ interface cards are: 1) the ability
to read out tension from sensor points along an entire production line
from one location, either remotely or at the machine; and, 2) the lower
cost of installation versus a single, dedicated tension interface/amplifier
for each sensor point.