M3539-S600Ax3-1500VDC
12
The voltage attached to this terminal is referenced to the DC1-, DC2-,
and DC3- main power terminals.
4.1.2.2.
TB3-1&2
C
ROWBAR
F
IRE
S
IGNAL
This signal can be used to remotely fire the SCRs with a 24VDC signal.
Terminal 1 is the +24V signal, terminal 2 is the 24V- or common signal.
The firing operation will be determined by the jumper on TB8.
If the jumper on TB8 is installed in terminals 2 and 3, the unit will fire
when there is a 24VDC falling edge on TB3-1&2.
If the jumper is on TB8 terminals 1 and 2, the SCR fire signal has no
effect.
In either case, the unit will fire when the High Voltage sensing voltage
between TB1 and DC- reaches the level set by the jumpers on TB2.
4.1.2.3.
TB3-
3&4&5
SCR
F
IRED
S
IGNAL
The SCR Fired signal will change when the SCRs are triggered. These
outputs are isolated so they may be interfaced with PLC or external
switch.
Terminal 3 is a normally closed signal.
Terminal 4 is common to both signals.
Terminal 5 is a normally open signal.
4.1.2.4.
TB3-6&7
O
VER
T
EMPERATURE
S
IGNAL
The over temperature contact opens when the heatsink temperature
reaches 220±5°F and closes when it reaches 190±10°F.
4.1.3. I
NTERNAL
P
OWER
I
NDICATOR
The unit has an indicator in the control board that will be illuminated when
external 24V is applied.
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