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4-1 Digital Pulse Inputs (continued)
4-1.1 Input 3A - STANDARD:
High Impedance (Terminal 3, 4).
Has 10 K Ohm pull down resistors to ground
(Terminal 12) and must be driven high. Typical
drivers include a contact closure from a 3-30 VDC
source (such as Terminal 13), a PNP transistor
(proximity switch or other device) or an amplified
signal from an inductive pickup. Remember, the
input signal must be referenced to Terminal 12 of
The Unit. (See Section 2-2, Fig. 2-2 Typical
Digital Wiring Connections)
4-1.2 Input 3B
High Impedance with pull-up (Terminal 3, 4).
Has 4.7 K Ohm pull up resistors to +5 VDC and
must be pulled low. Typical drivers include a
contact closure to Ground (such as Terminal 12),
or an NPN transistor (proximity switch or other
device). Remember, the input signal must be
referenced to Terminal 12 of The Unit. (See
Section 2-2, Fig. 2-2 Typical Digital Wiring
Connections)
Idea: This input works well with TTL devices.
4-1.3 Reset Input (Terminal 5)
Identical to the Standard, High Impedance Input
with one exception. The input speed is fixed for a
minimum pulse width of 5 msec. For a
description of what the reset signal does, refer to
Section 3-4.2.
Note: The reset input will not be changed to a
sourcing type of input even if the dip switch is set
for pull up or is changed to the pull up settings.
4-2 DC Power Inputs (Terminals 12, 14)
The Unit may be powered by an external DC
power supply. The supply must provide 12 - 27
Volts DC and at least 280 mA of current. The
positive side (+DC) of the DC supply should be
hooked to Terminal 14 and the negative (or
Ground) side to Terminal 12.
NOTE: Units powered by DC Voltages do not
have an isolated voltage out on Terminals 15 and
16 or +12 VDC on Terminal 13.
4-3 AC Power Inputs (Terminals 17, 18)
The Unit may be ordered for 110 or 220 VAC
power. The unit requires single phase 50/60 Hz
AC power. The voltage range is
±
15% of the rated
voltage. Voltages below this range will not power
the unit. Voltages above this range may damage
the unit. The Unit is relatively immune from
electrical noise on the AC lines. However, in
extremely noisy applications some line
conditioning or filtering may be necessary. If
fusing is required, external fusing must be
supplied.
Note: The Unit has no internal fuse to blow out.
If the unit does not function when power is
applied, contact the factory for assistance or to
arrange for repair.
Summary of Contents for KEPtrol F/C
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