RTS CIF-612 Specifikace stáhnout pdf (Strana 8)

222

ELECTRICAL INSTALLATION, SIGNALS

(Continued)

ME306

CONNECTIONS Figure 2-1 shows how to

connect a VIE396 to the SAP1626. This approach

provides two channels of two-wire intercom per

channel. Only the lower set of camera thumbwheel

switches are processed by the VIE306 electronics to

provide station isolate and two wire to four wire

conversion. The upper row of camera thumbwheel

switches appears at the rear panel of the VIE306

unprocessed and

the two-wire plus

format.

Two VIE306's may be used for a 12 camera installa-

tion. These two VIE306's may be connected in one of

two ways.

The frrst way is with special cable

RTS

Systems part

number 9020-2976-00. Connections are shown

Fig-

ure 2-7. This cable sends the upper row of CAMERA

thumbwheels, normally [Channel

for Cameras 1-6

to one VIE306 as Cameras 1-6. The lower row of

CAMERA thumbwheels, which are normally

[Channel 21 for Cameras 1-6, to a second VIE306 as

Cameras 7-12. The disadvantage of this method

that

there is only one channel per camera, however

the

cameras are being operated in the 4wire mode the

second channel

generally not used.

The second method, for a 12 Camera installation, re-

quires two SAP1626's and two VIEWS as shown in

Figure 2-8. The advantage of this method is that two

channels per camera are available and may be se-

lected via the two rows of thumbwheels.

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RTS CIF-612 Specifikace Strana 8