FCD25 programmable double limit switch0 pages

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Double limit switch FCD25

Programmable double limit switch
Analogue input 0(4) - 20 mA
Selectable min- or max limits
Start-up and reaction timer
Supply voltage 24 VDC
Programmable inputs
Made in accordance with the
and EMC regulations
FCD25 is a double limit switch for monitoring of current signals, f.inst. from 2-wire transmitters with 4-20 mA output or
other units with current output.
Analogue input
The analogue input is programmable for either 0-20 mA or 4-20
mA. The input range is adjustable too, down to 10 mA for 100%
input range.
Digital inputs
The digital inputs are programmable for either positive or negative logic. The inputs are programmed for either active low or
active high.
At positive logic, input signals from 5-30 VDC are accepted.
At negative input, the input is connected to ground f.inst. with a
contact or an NPN output from a sensor.
Relay outputs
The unit is supplied with 2 relays, one for each limit.
Both relays have NO-contacts, and both of them are programmable for either activation or release, when the set limit is exceeded.
The alarms can be reset with the "Mode" button or input "S1".
Setpoints
The unit have two independent setpoints, programmable as
either min. or max. setpoint.
The setpoints are selected as a percentage of the range.
It is possible to cancel the monitoring with the input S2.
Start up timer
The start up timer is used if the start-up of a process is unstable
and you do not want an alarm during start-up.
It is activated when the input signal exceeds approx. 5 % of the
metering range.
If the start-up timer is set at 0, this function is cancelled.
Reaction delay
For each setpoint you can program a reaction delay in order to
avoid alarm in case of only a short exceeding of the setpoint.
Hysteresis
The hysteresis can be used on both limits.
The hysteresis band is always above a min-limit and under a
max-limit.
If the hysteresis function is used, an internal auto-reset function
is used.
If you use the hysteresis at a min. setpoint, at the input signal
goes to zero, you can reset the alarm by pressing the "Mode"
button or activate input S1.

Technical data:
24 VDC +/- 10%
max. 60 mA
-15°C to +50°C
0 - 90% RH, non-condensing
1-pole: 5 A - 250 VAC,
ohmic load
0(4) - 20 mA, 70 Ohm
pos. logic: 5-30 VDV
neg. logic: 0 V
External reset
Alarm blocking
200 g
58 x 36 x 86 mm

Supply voltage:
Current consumption:
Operating temp.:
Humidity:
Max. load, relays:
Analogue input:
Digital inputs:
Indput S1:
Input S2:
Veight:
Dimensions:

EMC og safety regulations.
Emmision:
EN 50 081 - 1
Immunity:
EN 50 082 - 2
Safety:
EN 60 730
Approvals: The units are produced in accordance with the CE
og low voltage regulations.

Connections:
R1
1
2
Reset 3 S1
Blok. 4 S2
5 GND

R2

6
7
+I in 8
GND 9
+24V10

0-20 mA
Supply

FCD25

Comadan
Produktion a/s

8-11