Tyco Mastr III, Руководство по установке

Страница: 20 / 50

LBI-38636S
21
Table 1 - Wire Line Installation Methods
METHOD DESCRIPTION PROCEDURE ADVANTAGES OR
DISADVANTAGES
1 Single metallic pair (the
control currents are
simplexed to line, a two
wire cable is required). a. Connect the metallic pair to
TB101-3 and -4.
b. Jumper P105-1 to P105-2,
and P104-1 to P104-2 on the
Interface Board.
Economical: Dependable where earth
ground currents may be large or good
earth grounds cannot be obtained. The
keying clicks will be heard on parallel
remotes.
2 Single metallic pair (the
control currents are
simplexed line to earth
ground, a two wire cable
is required). a. Connect the metallic pair to
TB101-3 and -4.
b. Jumper P105-1 to P105-2 to
P104-1 on the Interface
Board and connect TB101-6
to earth ground.
Economical: Minimizes keying clicks in
paralleled remotes but large ground
currents may result in interference with
control function if located near sub-
stations.
3 One voice grade circuit
for bi-directional audio
and the other a metallic
pair of control voltages. a. Connect audio pair to
TB101-3 and TB101-4.
b. Remove jumpers from P104
and P105 on Interface Board.
c. Connect control metallic pair
to TB101-1 and -6 on
Interface Board.
Provides excellent performance by
eliminating keying clicks and providing
no path for ground loop current, but
requires two pair.
4 Single metallic pair for
transmit audio and
control Currents. Single
voice grade circuit for
receive audio. A four
wire line is required. a. Connect the transmit metallic
pair to TB101-2 and -5 on
Interface Board.
b. Connect a jumper from
P104-3 to P104-2, and P105-
3 to P105-2.
c. Connect the remote receive
pair to TB101-3 and -4
Provides full duplex operation in which
the remote can operate in receive and
transmit simultaneously. But, requires
two pair.
Figure 7 - Typical E & M Signaling Application