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interconnect subsequent shelves. Each shelf controller
should be assigned unique sequential shelf addresses.
No connection should be made to the RS422 in
connector on the shelf containing the E220 HCOT-CTL.
4. FACEPLATE FEATURES
Table 6 defines the faceplate features of the
HFAC.
5. CONTROL PORT OPERATION
The HFAC provides a faceplate-mounted DB9
connector which supplies an RS232 interface for
connecting to a controlling terminal. Pin assignments
are shown in Figure 6.
1
6
DSR
2
7
RTS
3
8
CTS
4
9
5
Figure 6. Control Port Pin Assignments
(DCE Configuration)
61221051L1-5A
TXD (TXD to DTE)
RXD (TXD from DTE)
DTR
SGN GND
Table 6. HFAC Faceplate Features
Indicators
and LEDs
Indicates that power is present to the HFAC card.
PWR
Critical (red) ...... Indicates that a critical alarm condition is present.
ALARMS
Major (red) ........ Indicates that a major alarm condition is present.
Minor (yellow) ... Indicates that a minor alarm condition is present.
ACO ................. Alarm cut off. Indicates that the audible portion of an
The shelf address is indicated using two 7-segment LED displays. The
SHELF
address is programmed using the switches described in subsection 2 and
ADDRESS
tables A and B; or using the Options Setup screen (see Figure 11).
A single momentary push-button provided to operate the alarm cut off
Button
function. When the button is present, the audible portion of an active
ACO
alarm is silenced. The condition of the alarm itself is not affected.
This 0.25 -amp fuse is provided to protect the card from power-related
Fuse
failures. The fuse is a BUSS BMT-0.25, or equivalent. If the fuse opens, a
fuse alarm is generated as described in subsection 2. The fuse has a visual
tripped indicators. When the metal tab (visible through the cover) flips up,
the fuse has opened.
A faceplate-mounted DB9 connector which supplies an RS232 interface
RS232
for connection to a controlling terminal. Refer to subsection 5.
61221051L1-5, Issue 1
The terminal interface operates at a data rate range of
4.8 kbps to 19.2 kbps. The asynchronous data format
is fixed at eight data bits, no parity, one stop bit. The
supported terminal type is VT 100, or compatible.
Optional terminal parameters should be set as follows:
•XON/XOFF flow control
•TX carriage return
•Send ACK*
•Linewrap
•Duplex setting
•Asynchronous format
•Cursor
•Display Width
•Display Height
* or any other autonomously-sent character from terminal
Screen Abbreviations
Screen diagram abbreviations used are defined in
Table 7.
Description
alarm has been terminated.
On
<CR> (not <CRLF>)
Off
Off
Full
8 data bits, no parity,
1 stop bit
Off (if possible)
80 columns
24 lines (minimum)
7
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