Magpowr DIGITRAC 2 Instruction Manual - page 7
PULSE (0 to 5 vdc, 0 to10,000 pps) Diameter is calculated by dividing web speed by this signal, which is
proportional to unwind/rewind RPM. Select
)PULSE( on JP15 on main PCB. TB3.5 can be used to supply 5vdc
to the pulse generator. See current limitation in Paragraph 6.9. A web speed signal must be provided if the
diameter signal is
)PULSE(.
6.3
WEB SPEED INPUT
The DIGITRAC 2 needs a web speed input if a PULSE type input is used to calculate diameter of the roll on
unwinds and rewinds.
Select the SPEED INPUT TYPE under PROGRAM-CONFIGURE. Connect a web speed sensor between
TB3.8(+) and TB3.6(-) using shielded wiring.
VOLTAGE (0 to 10 vdc) Select
)VOLTAGE( ON JP9 on main PCB.
PULSE (0 to 5vdc, 0 to 10,000 pps) Select
)PULSE( on JP9 on main PCB. TB3.5 can be used to supply 5 vdc to
the pulse generator. See current limitation in Paragraph 6.9.
6.4 LOGIC
INPUTS
The logic inputs may be isolated with an external (5 to 24 vdc) power supply to interface with other equipment or
for increased noise immunity. Set JP7-8 (OPTO SUPPLY) to EXT (external) for an external isolated 5 to 24 vdc
power supply as shown in Figure 5. The current flowing in the logic inputs switches is 2 madc.
6.4.1
RUN/STOP
Connect TB4.4 to TB4.3 to initiate the stopping function. During STOP TIME the DIGITRAC 2 continues to
control tension as a closed loop system but INERTIA COMP and STOP MULTIPLIER are also activated.
See Section 6.7 to use isolated logic inputs (5 to 24vdc).
6.4.2
E-STOP (E-STOP IS AN AUXILIARY FUNCTION NOT INTENDED TO PROVIDE
CATEGORY 1 SAFETY PROTECTION)
Open the connection between TB4.2 and TB4.1 to initiate E-STOP. On unwinds the output goes full on. On all
other systems the output goes to zero.
See Section 6.7 to use isolated logic inputs (5 to 24vdc).
6.4.3
REMOTE TENSION ON/OFF
TENSION OFF sets the output to zero for all types of systems. For Type 2 and 3 systems OUTPUT LEVEL will
display 100% since these systems are reverse acting (i.e. tension decreases with increasing output).
Either of two optional modes of operation are selected using PROGRAM-CONFIGURE.
TOGGLE duplicates TENSION ON/OFF on the keypad. A momentary connection should be made between
TB4.5 and TB4.3 will toggle between TENSION ON and OFF. The TENSION ON/OFF key remains functional.
LEVEL turns TENSION OFF when TB4.5 is connected to TB4.3. The TENSION ON/OFF key is disabled.
See Section 6.7 to use isolated logic inputs (5 to 24vdc).
6.5
ISOLATED LOGIC INPUTS
If it is desired to isolate the logic inputs on TB4 to interface with other equipment or for increased noise immunity,
an external power supply can be used as shown in Figure 15. On the main PCB set JP8-7 (OPTO SUPPLY) to
EXT (external).
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