Atkinson Dynamics AD-28LD-MV Handbuch für Installation und Wartung - Seite 9

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three-position terminal block (J2) in the Class I wiring compartment.

The signal lines, remote control lines, remote power, and call dry con-

tacts are landed in a seven-position terminal block (J7) in the Class II

wiring compartment. The two wiring sections are isolated by a fishpa-

per barrier.

Disconnect power to the intercom before any installation,

maintenance, or configuration changes are performed.

There are three jumpers shown on the PC board in Figure 7 that

may need to be moved depending on the desired operation of the

intercom. J4 and J5 are for operating the intercom in either a bal-

anced signal line or unbalanced signal line configuration. These must

be moved together as a pair. They are factory set in the balanced line

position. J3 is for configuring the intercom as either a master or slave

device. The intercom is factory set in the master position.

There is a switch on the board, in the Class I wiring compart-

ment, to configure the operation of the board from 120 Vac to 240 Vac.

The switch is factory set for the intercom to operate on 120 Vac (see

figure 3).

See figures 5 through 12 for typical intercom configurations.

F. SERVICE.

Any maintenance must be performed by a trained electrician

in accordance with NEC guidelines and local codes.

1. General.

The call signal is substantially louder than normal voice mes-

sages being carried on the line. Do not depress the call switch

while carrying on a conversation with someone on the system.

This will subject the listener to very loud sound levels.

Federal Signal will service your equipment or provide techni-

cal assistance with any problems that cannot be handled locally.

Any units returned to Federal Signal for service, inspection, or

repair must be accompanied by a Return Material Authorization.

This R.M.A can be obtained from the local Distributor or Manufac-

turer's Representative.

WARNING

CAUTION

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