Nokeval 2800-2061, Manual

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10
A
B
C
Power supply 12...32 VDC
(Green connector)
or 85...240 VAC
(Grey connector)
The field display series is modular and easy to as-
semble. According to customers wishes. The basic
construction consists of mother board with tree slots,
A, B and C. Slot A determines meter type and provides
always input signal. Slot B and C are interchangeable.
As factory delivery input signal is always installed into
slot A , mA output into slot B and alarms into slot C. In
case of f.ex 4 alarms and relay card with 2 change-over
contact (2 + 2 relays) are used, you must place second
Slots A-C
Change of meter
type:
Input card is placed always
to slot A. By changing input
card you can get an other
type of meter. You can
change meter with pulse
input to meter with current
input, thermocouple, strain
gage etc.
Additional slots:
Additional cards provide
output 4..20 mA, alarms,
serial interface, BCD output
etc. Meter data sheet
dictates possible combina-
tions. grey connectors allow
line voltage 110..240 VAC
(relay contacts).
Power supply:
There are two different mother
boards power supply 85..240
VAC and 12..32 VDC. VDC-
mother board accepts
24 VAC. Connectors are
colour coded.
relay card into slot B. If you accept only closing or
opening relay contacts, you need only one relay card
with 4 relays placed into slot C. The slot B is now
usable for other optional outputs.
You can have different types of meters by only
changing the input card in slot A. Data sheet of each
type of meter dictates the possible combinations.
Recalibration of card is not needed; only scaling and
other settings must be set by front panel keys.
All cards have calibration
memory
Construction of field display series