Section A: Appendix A; General Information And Definitions; Detailedinformation - RTS 802 Technical Manual

A.2
Detailed Information
SECTION A: APPENDIX A
A.l
General Information and Definitions
Normally the SAP1626 serves the dual purpose of sig-
nal and DC power distribution. In general, the
SAP1626 connects between the system channels or
buses and
TW
User Stations or strings of
TW
User
Stations (normally to the
TW
User Stations through
the BOP220). The system channels or buses are usu-
ally established by
TW
Power Supplies. Often these
buses are also connected to an 800 series balanced
intercom system through a System Interconnect (e.g.
Models 862,860).
A "wet" channel contains 32 volts DC and two-way
intercom audio.
A "dry" channel contains, two-way intercom audio
only.
A TW User Station must be connected so that its
channel
1
is connected to a "wet" channel; its channel
2 may be connected to either a "wet" or
"dry"
channel.
(Exception: Local powered
TW
User Stations can be
arbitrarily connected to wet or dry channels).
The top row of switches on a SAP1626 connect to the
channel one inputs of TW User Stations and should
always be dialed to a "wet" channel. (Exception: If
all
stations are local powered, dial up can be arbitrary).
.,.
The bottom row of switches can be arbitrarily dialed
to any channel. Dialing to channel zero connects the
TW
User Station/StationsY channel two connection to
ground (dead channel).
The SAP1626 Power Supply Inputs can be connected
to one, two, three, or four three channel power sup-
plies to get three, six, nine, or twelve "wet" channels,
respectively.
On the SAP1626, Channels 13, 14, and 15 are always
dry, and, in general, the top row of switches should
not be left on these channels, because an unpowered
TW User Station could absorb some of the Intercom
or Program Audio that may appear on these channels.
Connect each of the four-pin INTERCOM CHAN-
NEL INTERCONNECT Connectors on the SAP1626
rear panel to a
TW
three channel Power Supply (for
wet channel operation) or a termination plug (dry
channel operation). Connect the two frfty pin con-
nectors to a Model BOP220 or equivalent using two
50-conductor ribbon cables.
Regarding the four-pin cable assemblies: One to four
cable assemblies required for connecting one to four
TW Power Supplies respectively. There are two types
of cable assemblies: one for the Early* PS30/PS60
power supplies and one for a l l the rest of the TW
Power Supplies:
The Late* PS30
The PS31
The PS50
The Late* PS60
Figure A-1 below shows early PS30/60 cable assembly
wiriig.
Figure A-2 below shows the connection of four Early
PS30/PS60 Power Supplies to the SAP1626.
Figure 2-1 above shows the connection of four sys-
tem-standard type Power Supplies (PS31, PS50, Late
PS30/PS60) to the SAP1626.
Figure 2-2 above shows the system-standard PS31,
PS50, and Late PS30/60, Power Supplies cable as-
sembly wiriig.
14.22
Special Note on Models PS30 and PS60
A l l Model PS30/PS60's have six "internal" or "local"
channels (versus "system" channels or "buses"):
three powered and three unpowered or "dry",
available on four 4- pin output connectors
(5101, J102,J106,J107).
The powered channels are on channels 1,3,5;
the dry channels, 2,4,6.
"
Ear!y y d late production PS30/PS60 power sup-
plies differ m their connections, explained below.
Page A-1