Siqura 1210 TRA-TRB User Manual

Audio, data and contact closure multiplexers for fiber-optic links

1. General description

ADS 1200 systems offer combined full duplex
transmission of data, audio and contact closure
signals, all independent, over one or two multimode or
single-mode optical fibers (TRA/TRB or TRX
respectively, see figures 1a, 1b). For technical
specifications, consult section 5.
Two 4-wire audio channels and two contact closure
channels are available on the topmost pair of modular
connectors (port 1 and port 2). The data section
comprises two RS-485/RS-422 (Manchester and
biphase compatible) and two RS-232 channels, on the
two lower modular connectors.
Internal dip switches control the configuration (2/4
wiring and type; default is 4-wire RS-485) of the RS-
4xx interfaces. If necessary, the RS-485 interfaces can
be adapted to use biasing; by default, the data
interfaces are transparent. By removing a jumper and
output rewiring, port D1 can be used for digital
current loop. Audio input impedance is jumper
selectable. The contact closure outputs are potential-
free and open on synchronisation failure.
LEDs indicate power and local as well as remote sync
status (see section 2), and also monitor data I/O.
The 7TE modules will slot into the backplanes of
TKH Security's MC 10 or MC 11 power supply
cabinets. Stand-alone models (/SA option, see
supplementary manual) needs an external 12 Vdc
power supply.

2. Connectors and indicators

Indication
o

o
(ST or FC connector) Optical input (two-fiber units)

(ST or FC connector)
o

(ST or FC connector)
Modular sockets:
A1/CC1
A2/CC2
D1/D2 (D1: see text)
D3/D4
System status LEDs:
*SYNC (red) No sync from optical in,
(orange) No sync @ remote optical in
(green) All sync OK
*DC (green) DC power good
Data status LEDs:
*D1, *D3 red/green RS-485 input to D1,3 = 1/0
off high-Z
*D2, *D4 green/off RS-232 input to D2,4 =1/0
Table 1. Connectors and indications on the ADS 1200 front
panel (the modular sockets take RJ-45 plugs)
© Siqura 2017
Version 021403-2f
ADS1200 (MW10)
ADS 1200
USER MANUAL
Meaning
Optical output (two-fiber units)
Optical input/output
(single-fiber units)
audio1, contact closure 1
audio2, contact closure 2
RS-485 (422), RS-232
RS-485 (422), RS-232
or no internal sync
Figure 1. ADS front panels: TRA (left, similar to
TRB, one-fiber), and TRX (right, two-fibers)

3. Configuration and installation

3a) Configuration

Interface selection and configuration are performed
using switches and jumpers on the circuit boards of
the ADS 1200 units. To access these elements, each
unit must be opened by taking out the two front
panel Phillips head screws indicated in figure 1 and
partially sliding out the circuit board (shown in
figure 2).
An ADS 1200 data board has two 8-fold (S1, S2)
and one 4-fold (S3) dip switch blocks. The first
switch of each block and the ON positions are also
indicated in figure 2.
The jumper-pin groups A and B control audio input
impedance of A1 and A2, respectively; jumper C
regulates the current loop impedance of one of the
RS-485 data outputs (see below).
Data interface selection: the 4 dip switches in bank
S3 determine the RS-4xx interface type available
on ports D1 and D3 as per table 2.