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TECHNICAL SPECIFICATIONS
STANDARDS
EN61000-6-4
Electromagnetic emissions, industrial environment.
EN61000-6-2
Electromagnetic immunity, industrial environment.
EN61010-1
Safety
Install a fuse with a maximum capacity of 1 A near the module.
ENVIRONMENTAL
CONDITIONS
Temperature:
-10 ÷ + 65°C
Humidity:
30% ÷ 90% non condensing.
Storage temperature:
-20 + 85°
Protection rating:
IP65 (on the front with appropriate gasket)
INSULATION
2500 Vdc between each pair of ports (including those belonging to the optional board)
POWER SUPPLY
S311D-XX-L: 10 ÷ 40 Vdc, 19 ÷ 28 Vac, 50 ÷ 60 Hz, max. 3 W
S311D-XX-H: 85 ÷ 265 Vac, 50 ÷ 60 Hz, max. 3 W
CONNECTIONS
Removable screw terminals, 3.5 mm/5.08 mm pitch
DIGITAL
INPUT
Type: Reed, Npn (2 wires), npn 24 V (3 wires) or pnp 24 V (3 wires), NAMUR, Photoelectric
(Astra), Hall, 24 V input, TTL, Variable reluctance.
Absorbed current: max. 7 mA
Vmax.: 28 Vdc
Sensor power supply: 17 Vdc
Frequency band: 0.00014 Hz ÷ 10 kHz
Frequency resolution: < 0.05 %
ANALOGUE
OUTPUT
Applied current: 0 ÷ 20 mA, max. load resistance 500 W
Voltage: 0 ÷ 10 V, min. load resistance 1 kW
Configurable start and end of scale
Resolution: 2 mA / 1 mV
Response time: 5 ms
Maximum measurement field errors:
Calibration error: 0.1%
Thermal coefficient: 0.01%/°K
Linearity error: 0.05%
EMI (electromagnetic interference): < 1%
DIGITAL OUTPUT
Open Collector type, Imax: 50 mA, Vmax: 30 V
RELAY OUTPUT
Capacity: 8 A / 250 Vac (available only on optional board)
AUX. DIGITAL INPUT
Optoinsulated, Vmin: 10 V, Vmax: 30 V (available only on optional board)
OPERATION DESCRIPTION
The measurement of the digital input frequency or the totalizer value is translated into an analogue or digital output signal.
The frequency value or alternatively the totalizer value can also be viewed via the display; in the 11-digit model (4 + 7) both
values can be displayed simultaneously (4 digits: frequency value, 7 digits: totalizer value). The values are also available
via MODBUS-RTU protocol from the RS485 port (via optional board).
Setting mode:
All the parameters of the instrument can be set via the Programming Menu or RS485 (via optional board). The alarm
thresholds can also be set quickly via the specific Quick Alarm Menu. The dedicated Easy Setup software for programming/
configuring the module was also developed (see www.seneca.it).
Retransmission mode:
The instrument accepts the following retransmission modes:
Analogue output:
The measurement of the frequency of the digital input is translated into an analogue output signal
(current or voltage).
Digital output:
The output generates an impulse every time the totalization is increased or decreased. A pulse of duration
≥ ~ 100 ms is generated. The output follows the totalizer up to the maximum value of approximately 4.7 Hz. As the counting
frequency increases (up to the maximum value shown above), pulses are gradually lost until an output is obtained always at
a low logic level. The output is normally high.
