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4. ASSEMBLY
Note: The terminal strips are polarized and must not be placed backwards.
WARNING: Never install a channel fuse rated more than
100mA, and main fuse rated more than 800mA.
5. POWER SUPPLY
Figure 1.
The DRA-CSM-1 is supplied by a regulated power supply at a range of 15 to
40Vdc. This voltage is used to feed the connected transmitters via the multiplexer's
"V" terminals.
The DRA-CSM-1 unit adds about 350
W
to the current loop
5.1 MINIMUM SUPPLY VOLTAGE
The minimum supply voltage required to operate the multiplexer and the transmitters
fed by it can be calculated using the following equation:
Vmin = Vt + 0.02*(Rs+350)
3
The DRA-CSM-1 unit includes three printed circuit cards designated as P.N 7016,
P.N 7017 and P.N 7030.
The printed circuit cards should occupy the slots in the enclosure according to fig1.
c. Disconnect the flat connectors from the front panel.
d. Replace the blown fuse.
Connect the flat cables between the
printed circuit cards and the front
panel. The front panel must be
inserted into the grooves on both
sides of the case while pressing down
until a distinct "click" is heard.
Assembly is completed by laying the
terminal strips in place.