SA-ACU-SR User
Manual
S-Access GmbH
Tel: +41 44 700 31 11
Oberhausenstrasse 47
Page
9
of
16
Fax: +41 44 700 31 03
8907 Wettswil a/A
Email:
Switzerland WEB:
www.s-access.ch
3.3 Control and configuration of the modules
To implement the current control and management of devices, the SA-R-XXX shelf is
connected to a computer with the help of a cable via the “Monitor” socket.
The program of the VT100 terminal emulation must be launched. The communication
parameters should be tuned as follows:
•
rate: 9600 bauds, asynchronous;
•
number of bits: 8, without parity, 1 stop-bit;
•
flow control: XON/XOFF;
•
automatic carriage return to a new line is disabled.
The SA-ACU-SR module converts RS232 signal levels relative to the level of the common
TTL bus, which is on the shelf’s rear panel.
At any one time only one device in the shelf can be logically connected to a computer. The
device is chosen in accordance with its slot number in the shelf, starting with the left slot 1.
Some devices (for example, a dual modem) can contain more than one addressing device.
The addressing to the next device in the shelf is implemented by adding number 12.
To see a device in the shelf, type
“ECHO<Enter>”
. Each device in each shelf will send its
address. The response is represented as follows:
«%01 %13 %08 %10 %11 %12»
.
To start the logical connection with the device, type the
«%
ХХ
<Enter>»
command, where
ХХ
is the device address, consisting of two figures. The termination of the logical connection
occurs while choosing another device, implementing the “ECHO” or “Exit” commands in the
device control menu.
Note:
The control of the devices is implemented with the XON/XOFF flow control
protocol. It is recommended to start each session by pressing Ctrl-Q (XON) to
enable the communication with the devices with XOFF settings.
Note:
When installing the SA-ACU module into the shelf, the control through the
“MONITOR” socket on the rear side of the shelf becomes impossible.
3.4 Alarm
relays
The front panel of each device has LEDs indicating its condition. Each device has signal
outputs connected to the common signal bus of the shelf. The SA-ACU-SR module has two
relays and control circuits of their condition for the connection of the common bus to external
voice and visual alarm signaling units. Each relay (of urgent and non-urgent alarm) has
normally closed and normally opens contacts, which allow to use different connecting
schemes of the external alarm signaling. At an urgent or non-urgent alarm on any of the
cards in the shelf, there occurs a locking of the corresponding relay.
