Document: LT0109
Vigilant MICROVAC Owner's Manual
Installation, Wiring, Setup, and Commissioning
Issue 1.31
5 April 2000
Page 2-7
J47O
───────────────────────────
O
─────────────
O
────
§
───────┐
─┴─
─┴─
│
─┬─
CAPACITOR
─┬─
CAPACITOR
┌┴┐
100V
│
│
│
│
56K
LINE
><-/| ><-/|
│
│
EOL
><-\| ><-\|
└┬┘
RESISTOR
│
SPEAKER
│
SPEAKER
│
J46O
───────────────────────────
O
─────────────
O
────
§
───────┘
Select transformer tap
to give required volume
FIG 2.8
SPEAKER WIRING
Note - see further details in section 2.2.14 for details of the wiring to 100W and 200W
speaker outputs.
2.2.13 EXTERNAL DC POWER INPUT
The Rack Mounting Microvac is intended to be powered from the FIP DC power supply. The
standard Microvac can also be powered from an external DC supply if one is available and
Mains is not.
The 24V DC supply from the FIP should be connected to J5 (Bve) and J6 (Battery
-ve). There are two options available regarding the monitoring of this supply -
1.
Disable monitoring of this input and the Mains input by switching DIP switch 2:7 ON.
This option can be used if the supply is fully monitored by the FIP.
2.
Enable monitoring by switching DIP switch 2:7 OFF. In this case it is essential that
the DC voltage is always between the Charger High and Charger Low voltages as
detailed in section 1.3 Specifications and temperature compensated at -36mV per
°
C,
otherwise faults will be indicated.
If you connect a wire from J5 (Bve) to either of the 27V AC terminals, then the Mains
On LED will illuminate, and Mains Failure will not be indicated as a fault (option 2).
Alternatively, the Microvac could be powered by its own PSU, for example a PSU2406 or
PSU308. If one of these is used then it should be wired as shown in Figure 2.9. DIP Switch
2:7 should be ON, enabling monitoring. Any fault in the power supply will then indicate as a
Mains Fail Fault on the Microvac.
┌────────────────┐
Blue - not used
│
├──────────────
1
.5k
┌───────────────┐
│
PSU 2403,
│
Brown
┌─────┐
│
│
│
PSU 2406
├─────────────────────┤
├──────────┤
27V AC
│
│
or PSU 308
│
Red
└─────┘
│
│
│
├──────────────────────────────────────┤
J5 Microvac
│
│
│
Black
│
│
│
├──────────────────────────────────────┤
J6
│
└───┬───────┬────┘
ECP Lead
│
│
│
Black
│
Red
└───────────────┘
│1
0sqmm
│
│
│
┌┴───────┴┐
│
- +
│
The ECP switch on the PSU will control the Microvac
│
│
│
Battery
│
└─────────┘
FIGURE 2.9
PSU308 / PSU2406 WIRING TO RACK MOUNTING MICROVAC
Summary of Contents for MICROVAC
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