Under the prevailing socket the menu indicates:
Socket A1:
DC DataCable
Variant 0: Standard interface always active
0: RS232
Variant 1: Activation in case of addressing
1: RS485
11.2 Alarm processing, relays, and relay trigger cable
A data acquisition system is often used for monitoring,
i.e. to ensure, in the event of a specified limit being overshot / undershot, that
the appropriate visual, acoustic, or electrical alarm is triggered. The 5990-2 of-
fers a whole series of special functions, outputs, and external modules for pre-
cisely this purpose.
Alarm functions when a limit is overshot / undershot :
1. In the display an arrow SYMBOL flashes in front of the current measured
value; (see Section 5.3).
2. With each subsequent alarm the integrated beeper outputs a short acoustic
tone.
3 .An arrow SYMBOL in front of a maximum or minimum value indicates that
the maximum / minimum limit is being (or has already been) overshot /
undershot. The date and time-of-day are also displayed in front of the
maximum / minimum value concerned; (see Section 6.1.2).
4. The ALARM LED located on the front / rear of the unit lights up so long as
any channel anywhere in the system is affected by an alarm status.
5. Internal relays R0 and R1 in slide-in unit ES 5990-N (7b) react as
programmed; (see below). The resulting status of relay R0 / R1 is indicated
in the status bar of the display.
6. Further alarm cables can be connected externally to the various measuring
circuit boards and selector switch boards; these cables will only react to an
alarm status on the channels of the slide-in unit in question. Socket A1 on
the measuring circuit board (8) can be used to connect an alarm cable for
each of the function variants (see below). Selector switch board ES 5590-MF
(9) only supports limit value cable ZA-1000-GK2. Relay R0 energizes as
soon as any maximum limit on this board is overshot; relay R1 energizes as
soon as any minimum limit is undershot. On selector switch board
ES-5590-MU these relays are integrated; they function in the same way.
As an alternative, socket A2 on slide-in unit ES-5990-N (7c) can be used to
connect not only trigger alarm cable ZA-1000-EAK but also relay trigger
adapter ZA-8000-RTA (see Manual, Section 5.1.2/3) incorporating a maximum
of four mechanical switch contacts and two trigger inputs. Trigger inputs are
also provided on trigger cables ZA-1000-ET/EK; (see Manual, Section 6.6.4).
External modules and internal relays can, if they are connected via socket A2,
be programmed to function in various ways; (see Manual, Section 6.10.9).
ALMEMO
®
5990-2
65
Output Modules
Содержание ALMEMO V5 5990-2
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