All analogue inputs are electrically isolated by using
photovoltaic relays and a potential difference of 50V DC or 60V
AC, at maximum, is permissible between them. However,
sensors combined within one connector and sensors with an
own power supply are electrically connected to each other and
must, therefore, be operated in isolation. The voltage applied
to the measuring inputs must not exceed
±
5V (between B,C,D
and A or - respectively).
The cold junction compensation for thermocouple measurement is integrated
in socket M3 of the device.
Up to 8 passive selector switch boards, each with 10 photovoltaic relays, can
be used for an
extension of the measuring points
.
However, the total number of measuring channels is limited to 99 at maximum.
To be able to adapt the number of sensors to the individual requirements, the
number of channels of the measuring circuit board and the selector switch
boards can be independently configured to 10, 20, 30 or 40 (s.man. 6.10.13.1).
The numbering of measuring points starts and continues from the last
measuring point of the measuring circuit board. The selector switch boards can
be coded from 0 to 7 by the on-board code switches. The duration of a
measuring point scan increases proportionally to the number of measuring
channels. Analogue output cables can only be connected to the master board.
1. With the
selector switch boards ES 5590-MF
(9) for ALMEMO
®
flat
connectors the number of measuring points is increased in steps of 10
electrically isolated ALMEMO
®
inputs. Limit value relay cables can be
connected to all boards. The plug-in module required 2 PCB slots.
2. The
selector switch boards ES 5590-MU
(5) also have 10 inputs, which
are guided to a 64-pole socket terminal strip. The connection of the
sensors is performed via a 10-fold plug ZA 5590-MU each having 4
screw-type terminals A,B,C,D as with every ALMEMO
®
connector (see
man. section 4.1). The programming can be individually entered for each
sensor, however, it is stored in a common EEPROM that is located in the
connector. The plug-in module requires only one PCB slot and,
independent from the configuration of the channel number, 10 channels
are only available. For this reason, double sensors and sensors that
require a power supply or an ALMEMO
®
connector with logic control (e.g.
humidity sensors, rotating vanes etc.) cannot be connected. Two limit value
relays, separately for Max and Min exceeding of all channels, are already
mounted on the board and can be connected via the MU connector.
17
ALMEMO
®
5590-2
Connection of the Transducers
Summary of Contents for Almemo 5590-2 V5
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