Gefran 556 Data Sheet
556
QUARTZ TIMER / COUNTER / FREQUENCY METER
Main applications
• Timer
• Double timer
• Cycle timer
• Up/down counter
• Cycle counter
• Revolution counter
• Frequency meter
Main features
• Input from mechanical contact,
2/3-wires proximity switch or
AC voltage
• Timer, counter, frequency meter
configurable
• Six time scales, 1msec resolution
• Five counter prescalers
• Quartz timer
• Double display
• Count back-up on EEprom
at power off
GENERAL
The model 556 is configurable for many
different functions and is designed for
reliability in industrial environments.
The double display and minimum size
make it the ideal choice for every requirement for a timer, counter or frequency
meter.
The display can be expressed in the engineering units of the count effected using
one of the five prescaler ranges.
As a timer, it has six scale ranges from
hundredths of a second to hours and
minutes.
TECHNICAL DATA
I
NPUTS
Isolated 1500V (with reference to logic
output, for Vac power supply only).
The unit has three inputs enabling the following functions:
Counter input, Timer / Counter reset,
Up / Down or Start / Stop, Hold.
Maximum frequency with 50% duty cycle:
- type 2 inputs: fmax = 100Hz
- type 1 inputs: fmax = 1KHz
- type 0 inputs: fmax = 5KHz
Types of input:
Mechanical contact: from a voltage free
in open/closed configuration
Proximity switch: 2/3-wires NPN
Logic:
OFF ≤ 1Vdc, 3mA; 10Vdc < ON < 50Vdc
OUTPUTS
Relay
With rating 5A/250Vac at cosϕ = 1
(3,5A at cos
ϕ = 0,4)
Spark suppression on the NO contact.
POWER SUPPLY
110/220Vac ±10%
120/240Vac ±10%
24/48Vac ±10%
24Vdc ±10%
50/60Hz; 5VAmax.
TRANSMITTER SUPPLY
12Vdc, 30mA
AMBIENT CONDITION
Working temperature range: 0...50°C
Storage temperature range: -20...70°C
Humidity: 20...85%Ur non condensing
FUNCTIONALITY
Timer
The timer can count up or count down
according to the software setting.
When the unit is used as a timer, the
inputs have the following functions:
IN1: Start/Stop input
IN2: Reset input
IN3: Hold or Up/Down input
The action of the output following an
intervention is configurable.
Counter
The counter may also be configured to
Count Up or Count Down according the
software setting.
The following Clock prescaler factors may
be entered (:2, :10, :100, x2).
The displayed / entered value can be
expressed in engineering units of
whatever is being measured.
The conversion from a number to
engineering units is obtained by entering
suitable constants for the entries MOL
and DIV which will be used respectively
to multiply and divide the number of
pulses counted.
When the unit is used as a counter, the
inputs have the following functions:
IN1: Clock input (fmax. 5KHz)
IN2: Reset input
IN3: Hold or Up/Down input
The action of the output is configurable.
Frequency meter
Used as a frequency meter, the input
functions are:
IN1: Clock input
IN2: Reset of the Peak or Valley functions
IN3: Hold input.
U6 Function Timer monostable timer with resetU5 Function Timer with Memory of Output 2
U4 Function Timer with Memory of Output 1U3 Function Cycle timer with timed reset
U2 Function Monostable cycle timer with reset
U1 Function Single (non-cycle) timer
with reset
(Standard)
Used as a frequency meter, the value can
be displayed in engineering units using
the factors MOL and DIV.
DESCRIPTION OF THE OUTPUT FUNCTIONS
The following are examples of the
different possible output functions:
configured as a timer with countdown and
input IN3 with HOLD (a) or UP/DOWN (b)
functions.
In all other cases (counter or frequency
meter) the function of the output is
unchanged.
Used as a Timer or a Counter, the
maximum intervention time is 1msec.,
non-repetitive.
WEIGHT
240g
A - Main display, green digits h. 10mm
B - Secondary display, green digits h. 7mm
C - Function key
D - Lower key
E - Raise key
F - Input/Output indication,
green LED OUT, red LED I1 and LED I2
IP54 faceplate protection
FACEPLATE DESCRIPTION
Timer
IN1
IN2
Relay
IN3
Timer
Relay
Timer 1
IN1
IN2
Relay
IN3
Relay
Timer 2
Timer 1
Timer 2
(b)
(a)
(b)
(a)
(b)
(a)
(b)
(a)
(b)
(a)
(b)
(a)
Timer 1
IN1
IN2
Relay
IN3
Relay
Timer 2
Timer 1
Timer 2
Timer 1
IN1
IN2
Relay
IN3
Relay
Timer 2
Timer
Timer 2
Timer
IN1
IN2
Relay
IN3
Timer
Relay
Timer
IN1
IN2
Relay
IN3
Timer
Relay
Time Time
Time
TimeTime
Time
E
F
A
B
DC
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