Amplicon Magic 485F25 Instruction Manual - Page 10

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2.6

Power Requirements

The Magic 485F Adapter must be powered from an external power supply providing a positive

output of between +5.0 VDC and +12.0 VDC. This auxiliary power supply unit should be capable

of sourcing at least 100 mA for each 485 Adapter that it supplies. Within this constraint, as many

485 Adapters as are required can be fed from a single supply. The Amplicon Mains adapter

meets this requirement and the U.K. version is available under order code 919 135 69. See

paragraph 2.4.1 for information on connecting this mains adapter to the Magic 485F terminals.

The Magic 485F Adapter is fitted with an eight way pluggable terminal strip at its free end, and

the power supply should be connected to terminals 7 and 8. Terminal 8 is Ground or negative,

terminal 7 is the positive supply. OBSERVE POLARITY when powering the adapter. If the

polarity is incorrect, the Magic 485F Adapter will not operate, but is protected against damage.

2.7

Connecting the Amplicon Mains Adapter

The optional mains adapter plugs directly into a 3 pin, 13 A mains socket (U.K. version), or must

be fitted with a suitable plug (International version). The mains supply voltage must be 230 VAC

±10%, 50 Hz. The DC output is by a two-wire cable approximately 2 m in length. This cable is

terminated in a moulded connector which must be cut off and discarded. The two wires can then

be parted and stripped back about 6 mm. The black wire is negative and goes to terminal 8

(GND) of the Magic 485F Adapter, and the black wire with a white stripe is positive and goes to

terminal 7 (VDC). Section 2.8 gives the Amplicon order codes for the above adapters.

2.8

Optional Accessories

U.K. Mains Adapter Power Supply

Amplicon

Order Code

919 135 69

International Mains Adapter Power Supply

919 448 69

Page

Description

Function

Plug-in mains

Provides +9 VDC at 200 mA to power one or two Magic

Adapter

485F Adapters. Mains operated 230/240 VAC. Integral 3

pin, 13 A, UK style plug. Two wire output cable of 2 m

length. Moulded connector to be removed for screw

terminal connection to Magic 485F Adapter. Wire with

white stripe is positive.

The U.K. Mains Adapter complies with the requirements

of British Standard BS415

Wired-in mains

Provides +9 VDC at 200 mA to power one or two Magic

Adapter

485F Adapters. Mains operated 220/230 VAC. Two wire

(Brown - live, blue - neutral), 1.5 m length mains input

cable. Two wire output cable of 2 m length. Moulded

power connector to be removed for screw terminal

connection to Magic 485F Adapter. Wire with white

stripe is positive.

Magic 485F Adapter