Serial Interfaces; Table 6-1 Alarm Port Pinout - Sun Microsystems Netra ft 1800 Hardware Reference Manual

The remaining three alarms in each group are entirely under software control and
default to the non-alarmed state when powered-on and not initialized; they also
assume the non-alarmed state when power is removed.
The timed-pulse reset inputs are accessible on the same connector as the alarm
relays. There are two timed reset input signal pairs. Each pair consists of a signal
(RESET+) plus return (RESET-). Both pairs are optically isolated from the reset of the
system. The timed reset pulse is generated by asserting a signal on RESET+ of
greater than 3.3V with respect to RESET-. The acceptable voltage range of this input
is 3.3V to 48V continuous, and up to 60V at a 50% duty cycle. The current drawn by
the input is in the range 3mA to 12mA approximately. If the polarity of the
connections is reversed no damage will result. The pulse should last between 200ms
and 300ms.
The three general-purpose alarm indicators illuminate automatically when their
corresponding relays are in the on (alarmed) state.
Connection is via a male DB-15 with pinout as shown in
TABLE 6-1
Pin
1
2
3
4
5
6
7
8
6.3

Serial Interfaces

The following serial interfaces are provided:
Console port
Modem port
RCP port.
Alarm Port Pinout
Description
RESET0+
RESET0-
RESET1+
RESET1-
SYSTEM-NO
SYSTEM-NC
SYSTEM-COM
ALARM0-NO
TABLE 6-1
Pin Description
9
ALARM0-NC
10
ALARM0-COM
11
ALARM1-NO
12
ALARM1-NC
13
ALARM1-COM
14
ALARM2-NO
15
ALARM2-COM
Chapter 6 Console, Alarms and Fans
.
6-5