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Revision:
User's Manual (MUT)
A3486 3Phase 400Vac to 2x2kW/1x4kW 48Vdc
08/10/2007
10
NPO:
Filename:
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Page:
00120/04:A3486.MUTx/10 A3486_REV10.DOC
35
15
2 AMP 280372-2 type connectors (sense)
1 Distrelec 10 05 24 connector
2 red LEDs (channel ON)
WARNING: THESE TERMINALS DELIVER HIGH ENERGY (42A @ 48V
EACH); ABSOLUTELY DO NOT SHORT THEM WHEN CABLE CONNECTORS ARE
NOT PLUGGED, IN ORDER TO AVOID BIG SPARKS
NEGATIVE TERMINALS OF OUT CONNECTORS ARE INTERNALLY
CONNECTED TO PROTECTION EARTH TERMINAL, PROVIDED BY MAINS POWER
SUPPLY PLUG
The channels output connectors provide the 48V output. The Sense lines are used to
compensate for the voltage drop over the cable. Voltage is monitored directly at the load
by an high input impedance differential amplifier through the sense wires; the voltage
sensing circuit is schematically illustrated in the figure below.
R
cable
L
O
A
D
VMON
10K
Ω
R
cable
OUT
-
OUT
+
S +
S -
10K
Ω
Fig. 2.4 – Remote voltage sensing scheme
When the sense wires are connected to the load (pin 2 = S- and pin 3 = S+ of the four-
pin sense connector on back panel), the Vset value equals the voltage on the load; if the
sense wires are not connected (to the load), Vset will equal the voltage on the connector.
If sense wires will not be used, then is necessary to short circuit pin 1 = Out- with pin 2
= S- and pin 3 = S+ with pin 4 = Out+.
2.4.2.4 STATUS
This section provides the Status line for failure detection and includes:
1 Input AMP 280372-2 type connector
1 Output AMP 280372-2 type connector
