Outputs, Version Of Controller - DFE WebHandler 3 Instruction Manual

TENSION ZONES
Tension zones are created by driven or braked nip rolls, drag bars, braked or driven unwind or rewind shafts, or
anything else that can increase or decrease web tension. One of these elements is at each end of every tension
zone.
Many machines that process a continuous web have more than one tension zone. The WebHandler3™ controller
can be used in all tension zones, when properly configured for the zone it will be used in. See Figure 2 for
examples of tension zones.
1.2 OUTPUTS, VERSIONS OF CONTROLLER
™
The WebHandler
A. Pneumatic output
version includes a servo valve, air filter and pressure regulator installed in an separate enclosure. The output
range is 0.5 to 75 psi.(0.03 bar to 5.17 bar). Also see D. below.
B. High Voltage output
standard variable voltage of up to 90Vdc to operate any electric brake or clutch, including eddy current
clutches. 45 volt, and 24 volt outputs (24V not available with 230Vac input) are optional.
C. 0-10Volt DC compensated output module
variable speed drive systems. This output can be isolated from earth ground to make it more compatible with
all drives. See Options, Section 1.6, for more details.
D. Driver Card. (Version C). This version provides power and signal outputs for non-standard pneumatic
servo valves.
Figure 2 - EXAMPLES OF TENSION ZONES
Model 3 controller is available with one of four outputs:
. (Version P). This is used to actuate any air operated brake or clutch. The standard
. (Version V). This output uses Silicon Controlled Rectifiers (SCR's) to produce a
. (Version D). This output is used to control DC drives or other
2