Control Description; Ok Relay; Precharge Enabling Control; Mlp Signal - gefran SM32 Manual De Instrucciones

4. CONTROL DESCRIPTION

4.1. OK RELAY

The OK relay has a normally open contact which close at the end of the precharging phase if
no alarm condition is present (overtemperature, power supply on the regulation card +/-
15V).
The contact is closed during the normal functioning of the device and also during an
undervoltage situation. The contact opens when a failure occurs (see the alarm conditions
described above) or when the power supply is switched off and the DC-LINK is completely
discharged (C and D terminals).

4.2. PRECHARGE ENABLING CONTROL

Such input allows to delay the precharging phase with respect to the moment in which the
power supply (U,V,W terminals) is applied.
The precharging phase occurs supplying terminals 23 to +24V (available on the terminal strip).
(common on terminal 52).

4.3. MLP SIGNAL

The MLP signal is a digital output available on the terminal 32.
This signal is a sum of the undervoltage threshold (via S2.1-3 set) and the precharging phase.
It will be LOW with a 0.5mS delay after the undervoltage threshold is reached. The digital
output will be again HIGH, at the end of the precharging phase. (This sequence is repeated
at every mains dip)
(see chapter 6.2 figure B).

4.4. ML SIGNAL

The ML signal is a digital output available on terminal 36. It is the AC mains voltage
monitoring.
With "CV" jumper mounted (on), the ML signal will be LOW when the undervoltage
threshold is reached.
The digital output will be HIGH when the voltage is above the threshold (see the above table).
With "CV" jumper not mounted (off), the ML signal will indicate, with a 150mS pulse, an
undervoltage value transition.
When the voltage comes back above the threshold value, this will be not revealed by the ML
signal.
(see chapter 6.2 figure B).
42-GB
—————— SM 32 ——————