M-6200A Application Guide
–8–
TB1‑3
Oo Connection or Source Voltage
TB1‑4
+12 Vdc Wetting Voltage
This is the output of an unregulated dc power supply internal to the control. It is referenced to
neutral and can supply up to 100 mA. It is used for powering the digital inputs of the control
through external dry contacts. Depending on the voltage supplied to TB1-10 and loading,
its output can vary from +10 to +18 Vdc. The output is current limited with a 1 ohm resister.
TB1‑5
Regulator Raise Iutput
This switched output connects the tapchanger raise winding to the source of motor power.
When the control calls for a raise, it is capable of switching up to 6 A at 120/240 Vac.
TB1‑6
Regulator Lower Iutput
This switched output connects the tapchanger lower winding to the source of motor power.
When the control calls for a lower, it is capable of switching up to 6 A at 120/240 Vac.
TB1‑8
Oeutral
This is the return for the n12 Vdc “wetting” voltage (TB1-4) and the voltage input
(TB1-10).
TB1‑9
Motor Power Input
The source for powering the tapchanger motor is connected here. It may have a maximum
voltage of 240 Vac.
TB1‑10
Load Voltage Input
This input accepts nominal 120 Vac, 60 Hz (or 50, Hz as ordered) to operate the control's
power supply and voltage sensing input. The acceptable voltage range for proper control
operation is from 90–140 Vac.
Power consumption is less than 8 VA. The input voltage is referenced to line neutral (TB1-8).
TB1‑11, TB1‑16
Oeutral Tap Position Inputs
This digital input registers neutral position switch closures on regulators. The pins are
isolated from neutral to permit connection of the input based on regulator configuration.
TB1‑12
Drag Hands Reset
The drag hand reset output (TB1-12) connection is commonly used to reset the drag hand
on the regulator. When the Drag hand switch on the M-6200A is activated, this will cause
the unit to output 120 V to TB1-12. This voltage can be used to energize the drag hand
circuitry on the regulator.
TB1‑13
Iperations Counter Input
This digital input registers the counter contact closure. The operations counter will increment
when TB1-13 is grounded by way of the regulator dry operation count switch. This contact is
needed for using the intertap time delay. Once a valid counter input is detected, the intertap
time delay will begin counting down.
