Du line
Fieldbus
Installationbus
Specifications are subject to change without notice (28.09.99)
1
Dupline
is a registered trademark. A product of the CARLO GAVAZZI Group
Transmitter with counter input
4-digit totalizing up-counter
Overflow indication
Reset input
D-housing
Plug-in type module
LED-indication for supply
AC or DC power supply
Product Description
Dupline
transmitters with
pulse input and 4-digit totali-
zing up-counter. Reset and
disable inputs. Detection, up-
counting and transmission of
low-frequency events for
readout, control, logging etc.
Type Selection
Supply
Ordering no.
4-digit
counter
24 VAC
FFD 1680 024
120 VAC
FFD 1680 120
220 VAC
FFD 1680 220
10 to 30 VDC*
Code module
FMK A-B to O-P
* All AC types may be supplied with 10 to 30 VDC at pins 3 & 9
Input Specifications
Count input
1 contact or NPN transistor
Open loop voltage
8 VDC
Short-circuit current
2 mA
Counting range
0 to 9999
Counting direction
Up
Input frequency
25 Hz
Contact resistance
100
Dielectric voltage
Input - Dupline
None
Reset input
1 contact or NPN transistor
Open loop voltage
8 VDC
Short-circuit current
2 mA
Operating time for signal "1"
1 pulse train + 20 ms
Operating time for signal "0"
1 pulse train + 20 ms
Contract resistance
100
Cable length
3 m
Dielectric voltage
Input - Dupline
None
Transmission disable input
1 contact or NPN transistor
Open loop voltage
8 VDC
Short-circuit current
2 mA
Operating time for signal "1"
1 pulse train + 10 ms
Operating time for signal "0"
1 pulse train + 10 ms
Contact resistance
100
Cable length
3 m
Dielectric voltage
Input - Dupline
None
Ordering Key
Type: Dupline
Input signal
Supply
Transmitter for Numerical Counter Signals
Type FFD 1680
FFD 1680 024
Du line
Fieldbus
Installationbus
2
Specifications are subject to change without notice (28.09.99)
Dupline
is a registered trademark. A product of the CARLO GAVAZZI Group
FFD 1680
Supply Specifications
General Specifications
Power supply AC types
Overvoltage cat. III (IEC 60664)
Rated operational voltage
through pins A1 & A2 220
230 VAC +6%, -15% (IEC 60038)
120
120 VAC 10% (IEC 60038)
024
24 VAC 10%
Frequency
45 to 65 Hz
Voltage interruption
40 ms
Rated operational power
Typ. 2.5 VA
Rated operational
withstand voltage
220
4 kV
120
2.5 kV
024
800 V
Dielectric voltage
Supply - Dupline
2 kVAC (rms)
Supply - Count input
2 kVAC (rms)
Supply - Reset/Disable input
2 kVAC (rms)
Alternative DC supply
Overvoltage cat. III (IEC 60664)
Supply voltage (V
DD
in)
through pins 3 & 9
10 to 30 VDC (ripple included)
Ripple
3 V
Reverse polarity protection
Yes
Rated operational current
20 mA
Inrush current
1 A
Rated operational withstand
voltage
800 V
Dielectric voltage
Supply - Dupline
None
Supply - Count input
None
Supply - Reset/Disable input None
Mode of Operation
Transmitters with 4-digit
pulse counting function. The
module features reset and
transmission disable inputs.
The accumulated counting
value is transmitted in BCD
representation on the Dupline.
This implies that every digit
uses 4 channels. The-digit-
to-channel allocation is as
follows (example with FFD
1680 and FMK C-D plugged
in):
10
0
on highest 4 selected
channels (e.g. D5-8).
10
1
on lower 4 channels of
higher group (e.g. D1-4).
10
2
on higher 4 channels of
lower group (e.g. C5-8).
10
3
on lowest 4 selected chan-
nels (e.g. C1-4).
For every digit the most sig-
nificant bit of the BCD equiva-
lent influences the lowest of
the 4 allocated channels.
Activation of the reset func-
tion (pin 3 connected to pin 1)
always resets the internal
counter to 0, irrespective of
the disable and counting in-
puts.
When the transmission dis-
able function is activated (pin
3 connected to pin 5), the
transmitter does not transmit
its value via the Dupline
whereas the internal counter
can still operate.
A Dupline
system can have
several FFD 1x80s coded to
the same channel groups. In
this case the counting values
may only be emitted from
one transmitter at a time, the
other transmitters must be
disabled in the meantime. This
feature
is best obtained by
using Dupline
receivers with
demultiplex output type D
1230 5111 connected to the
transmission disable inputs.
FK3C 7640 and FL3C 7640
or D 6369 6475 can be used
for display of FFD 1680 va-
lues. FK3C 7760 and FL3C
7760 can be used for display
of FFD 1780 values.
Overflow: When the counter
reaches 9999 (999999), the
transmitter activates all coded
channels, thereby causing
Dupline
displays to become
dark.
Note: If DC-supplied FFD ....
transmitters are used, the
length of the supply bus must
not exceed 3 m in order to
avoid disturbances unbalan-
cing the Dupline
.
Note: Transmitters for nu-
merical signals must not be
used in systems where chan-
nel generators with 2 or 3 se-
quences are installed.
Power ON delay
Undefined,
1 s
Indication for
Supply ON
LED, green
Environment
Degree of protection
IP 20 B
Pollution degree
3 (IEC 60664)
Operating temperature
-20 to +50C (-4 to +122F)
Storage temperature
-50 to +85C (-58 to +185F)
Humidity (non-condensing)
20 to 80%
Mechanical resistance
Shock
15 G (11 ms)
Vibration
2 G (6 to 55 Hz)
Dimensions
Material
(see "Technical Information")
D-Housing
Weight
200 g
Approvals
CSA
PDF 
ZIP