Seneca S312A-4-L-4R User manual

ENGLISH - 1/21
MI00250 -E3
S312A-4-L-4R / S312A-4-H-4R Line
Advanced Analog Indicators
4-Digits Display with 4 relay outputs
Universal input: voltage, current, thermocouples,, thermoresistors (2, 3 or 4 wires
measurements),potentiometer.
Programmable retransmission of the measured instantaneous value by the isolated
analogoutput(voltageoractive/passivecurrent).
Filterprogrammableat20levelstostabilisereading.
TemperaturemeasurementdisplayableinCelsiusorFahrenheitdegrees.
Coldjunctioncompensationincaseofthermocoupleinput.
4Digitsdisplay.
Four alarms are activable on the instantaneous input value (alarm type: maximum,
minimum,automaticallyresettableornot).
Alarmsstatusvisiblethroughfourledsonthefrontalpanel.
Rs485serialcommunicationwithMODBUSRTUprotocol,maximum32nodes.
Fourrelayoutputsforalarmssignalling.
EasynavigationontheprogrammingMenubythreebuttonsonthefrontalpanel.
QuickconfigurationofthealarmthresholdsbytheQuickAlarmsMenu.
DisturbanceRejectionat50and60Hz.
Displaycontrastsettable.
Fourrelayoutput:defaultstateforout3andout4aresettablebyinternaljumper
1. GENERAL SPECIFICATIONS
2. TECHNICAL SPECIFICATIONS
Potentiometer Input:
Analog Output:
Thermocouple Input:
ThermoresistorInput
(RTD)PT100
Current Input:
Voltage Input:
Power Supply:
ExcitationCurrent:1,1mA.
Potentiometervaluefrom1k to100k tousealwayswitha 
parallelresistorequalto330 .
GeneratedCurrent:0..20mA,maxloadresistance:500 .
Voltage:0..10V,minloadresistance:1k
ConfigurableStartandFullscalevalues.
Resolution:2 A/1mV.
Type: J, K, R, S, T, B, E, N; resolution: 10 V Refer to the 
TABLE:TCRANGEforthemeasurementrange.
2, 3 or 4 wires measurement, excitation current: 1,1 mA,
resolution:0,1°C.
TemperatureRange:-150°C..650°C.
ResistanceRange:20..350 .
0..20mA,inputimpedance 20 
Resolution:10000points.
0..10V,inputimpedance:100k
Resolution:10000points.
CodeS312A-4-L-4R:10-40Vdc,19-28Vca50-60Hz,max3W.
CodeS312A-4-H-4R:85-265Vac50-60Hz,max3W.
EN

Environmental Conditions:
Errors referred to max
measuring range:
Voltage/Current Input:
Input for thermocouples:
J,K,E,T,N:
Input for Thermocouples:
R,S:
Input for Thermocouples:
B :
Cold junction compens.:
Potentiometer :
Thermoresistor Input :
Voltage/Current Output :
Isolation :
Connections :
Protection Degree :
Dimensions (L x W x H)
Standards
Temperature: -10..60°C, Humidity min: 30%, max 90% at
40°Cnon-condensing.
Calibration
Error Thermal Coefficient Linearity error Others
0,1% 0,01%/°K 0,05% EMI :<1%(2)
0,1% 0,01%/°K 0,5 °C EMI :<1%(2)
0,1% 0,01%/°K 1 °C EMI :<1%(2)
0,1% 0,01%/°K 2 °C EMI :<1%(2)
" 1,5 °C
0,1% 0,01%/°K 0,1% EMI :<1%(2)
0,1% 0,01%/°K 0,2% EMI :<1%(2)
EMI :<1%(2)
0,1% 0,01%/°K 0,05%
1500Vamongeachpairofports
-Removablescrewterminals,pitch3,5mm/5,08mm.
-Threebuttonsformenunavagation.
IP65 (on the frontal panel with the provided seal)
98,2 x 88,5 x 48 mm
EN61000-6-4/2002-10 (electromagnetic emission, industrial
environment).
EN61000-6-2/2006-10 (electromagnetic immunity, industrial
environment).
EN61010-1/2001(safety).
All circuits must be isolated from the other circuits under
dangerous voltage with double . The power supplyisolation
transformer must comply with EN60742: “Isolated
transformersandsafetytransformers”.
(2) EMI: electromagnetic interferences.
Sampling Frequency: Fixed:2Hz.
Response Time: 700ms.
Relay output: Capacity:5A/250Vac.
Table: TC Range
Admitted
Range Admitted Range
TC
TYPE
TC
TYPE S
-210..1200 °C -50..1768 °CJR
-200..1372 °C -50..1768 °C
KB
-200..1000 °C 250..1820 °C(3)
ET
-200..1300 °C -200..400 °C
N
(3) Up to 250 °C, the output is considered equivalent to a null temperature.
ENGLISH - 2/21MI00250 -E3

NC
NO
NC
NO
4. FUNCTIONING DESCRIPTION
Themeasuredorintegratedinputvalueistranslatedintoananalogoutputsignal.
The instantaneous measurement of the input is displayed. The values are also available via
ModbusRTUprotocoluponquerybyRS485bus.
4.3 Alarms on the Analog input
Four alarms may be activated on the instantaneous value of the input. Each alarm may be set
onthefollowingway:
1)Alarmontheminimumthershold. 2)Alarmonthemaximumthershold.
3)Retained Alarmontheminimumthreshold(theresetisnotautomatic).
4)RetainedAlarmonthemaximumthreshold(theresetisnotautomatic).
For each alarm, it is possible to set Threshold and Hysteresys. If the alarm is set as high, the
alarmwillturnOFFwhentheinputvalueisThreshold-Hysteresys;insteadifthe alarmissetas
low, the alarm condition will end when if the input value is Threshold+Hysteresys.The alarms
status is displayed by four leds on the frontal panel and by the relays. The relays toggle at the
alarmconditionandreturntotheinitialstatusattheend ofthealarmconditionoratthereset(if
retained). The retained alarms are reset by pressing the buttons + for someUP OK/MENÙ
seconds(onnormalviewfunctioning).
4.2 Retransmission Modalities
Theinstrumentallowsthefollowingretransmissionmodalities:
Analog Output: The measured input value is translated into an analog outputsignal (voltage
orcurrent).
4.1 Setting Modalities
All the parameters of the instrument may be set by the programming Menu or RS485. The
alarms thresholds may be quickly set by the . Besides the software hasQuick Alarm Menu
beendevelopedfortheprogrammingandtheconfigurationofthemodule(consultthewebsite
www.seneca.it).
ENGLISH - 3/21MI00250 -E3
3. RELAYS AND JUMPER
POSITION
ToextracttheboardsfromS312Abox:
1) remove the screw terminals from
rearpanel
2) press inwards the box on the top
panel (where there is the serigraphy)
and, at the same time, press inwards
theboxonthebottompanel
3)extractthedisplayindicator
4)extracttheboardsfrombox.
Boardsareasinthefollowingfigure.
*NOTE: DEFAULT: N.O. means
«NORMALLYOPEN»
JUMPER
( )DEFAULT:N.O.
JUMPER
( )DEFAULT:N.O.

mA input
+
The loop is powered
by the module (17 V Loop)
CURRENT INPUT mA input (2 wires) VOLTAGE INPUT
3.0 W
10 ÷ 40 VDC
19 ÷ 28 VAC
1
2A
POWERSUPPLY:Verifythecodeontheappliedlabel.
99
10 10
8
7
+
8
7
9
10
8
7
6.ELECTRICALCONNECTIONS
4.4 Password for access to the menu
Code S312A-4-L-4R
3.0 W
85 ÷ 265 VAC
1
2B
Code S312A-4-H-4R
+
2 wires
9
10
8
7
PT100 INPUT
3 wires 4 wires
9
10
8
7
9
10
8
7
THERMOCOUPLE INPUT
+
Resistance R=330 (not provided),
P=1 k 100 k  
POTENTIOMETER INPUT
R=330 P
10
9
8
7
9
10
8
7
The loop is powered
by the sensor
ItispossibletoenabletheprotectionoftheProgrammingMenubypassword.
TheQuickAlarmMenuisinsteadpasswordfree.
ENGLISH - 4/21MI00250 -E3
Rs485
Led
22 22 223 1
Alarm 3/1
Led
Alarm 4/2
1987 1 2A2B 6543 10
DOWN OK/MENÙUP
Relay
1
4
21 11 08 971 11 11 16 35 24 1
F : B LRONTAL PANEL UTTONS AND EDS
REAR SIDE: TERMINALS
Pow. Supply Output Input
5.BUTTONSANDTERMINALSPOSITION Relay
2
Relay
3
Relay
4
3

11
12
13 16
RS485 Relay Output 1 (5 A/250 Vac) Relay Output 2 (5 A/250 Vac)
N.C. N.C.
N.O. N.O.
Com. Com. 15
14
Voltage
+
ANALOG OUTPUT
Generated Current Ext. Power Supply Current
+
5
4 4
4
3 3
1 = Voltage
2 = Current
3 = Potentiometer
Input Type 2 :
Current
Default
Value
Description and setting rangeParameter NameParameter
Symbol
Parameters settable from Menu :
21
22
23
B
A
GND
7. MENU’S PARAMETERS
Parameter
Symbol Parameter Name Description and setting range Default Value
Enables the
Password for the
access to menu
Setting a value diffferent from , the5477
password (always 5477) will be required at the
startofthemenu.
5477:
Password
disabled
Parameters settable from Menu :
4 = TC J
5 = TC K
6=TCR
7=TCS
8=TCT
9 = TC B
10=TCE
Active Output
(powered) to
connect to
passive inputs.
Unpowered
passive output to
be connected to
active inputs.
11=TCN
12=PT100(2wires)
13=PT100(3wires)
14=PT100(4wires)


   . . . .
   . . . .
ENGLISH - 5/21MI00250 -E3
RELAY OUTPUT
17
18
Relay Output 3 (5 A/250 Vac) Relay Output 4 (5 A/250 Vac)
N.O./N.C.
(set the jumper)
Com. Com. 20
19
N.O./N.C.
(set the jumper)
Default: N.O.
normally open Default: N.O.
normally open

Temperature
measurement in
° C or ° F
0=Celsiusdegrees.
1=Fahrenheitdegrees.
0=nofilter
1...20
Filter Level
0 = ° C
0 = No
filter
Onlyforinputtype1,2and3.
Start scale in V (voltage input) or mA (current
input)or%(potentiometer).
It defines also the value of the input signal
associatedtotheminimumvalueofview( ) .
SettableValues
Values included between the minimum and
maximum limits specified for the secleted input
type.MinimumValue:0,MaximumValue:99,99.
Electrical Start
Scale Value 4,00 (mA)
Electrical Full
Scale value Onlyforinputtype1,2and3.
Full scale in V (voltage input) or mA (current
input)or%(potentiometer).
It defines also the value of the input signal
associatedtothemaximumvalueofview( ) .
SettableValues
Values included between the minimum and
maximum limits specified for the secleted input
type.MinimumValue:0,MaximumValue:99,99.
20,00
(mA)
Parameters settable from Menu :
Default
Value
Description and setting rangeParameter NameParameter
Symbol Onlyforinputs1,2and3.
Integervaluesbetweenthefollowinglimits:
Start scale of
instantaneous view 0
Display Digits
Number Min. Limit Max. Limit
49999 -1999
Full scale of
instantaneous view 1000
Inputs1,2and3
0=nodecimalpoint(ex1234),
1=firstdigit(es123.4) ... ...
Ndisplaydigit-1
TemperatureMeasurement
0 = resolution: °C (°F).
1 = resolution: °C/10 (°F/10).
Decimal Point
position on the
instantaneous view
0 = No
decimal
point







   . . . .
ENGLISH - 6/21
MI00250 -E3

ENGLISH - 7/21MI00250 -E3
           . . . . . . . . . . . . . . . .
49999
-1999
1000
10
10
1000








49999
-1999
1000
10
10
1000








Alarm 1 Threshold
Alarm 1 Hysteresys
Display Digits
Number Min. Limit Max. Limit
Default
Value
Description and setting rangeParameter NameParameter
Symbol
Parameters settable from Menues :
Alarm 4 Threshold
Alarm 2 Hysteresys
0: Al 2
disabled
Value referred to the displayed value (decimal
pointsetby ).
Temperature input: value expressed as set by
 (°Cor°F).
Settablevalueonthefollowingranges:
Alarm 1 Type
Alarm 2 Type
0=Alarmdisabled
1=Alarmontheminimumthreshold
2=Alarmonthemaximumthreshold
3 = Retained alarm on the minimum threshold
(theresetisnotautomatic)
4 = Retained alarm on the maximum threshold
(theresetisnotautomatic)
0: Al 4
disabled
RelayFunctioning:
0=relaynormallyopened(N.O.)
1=relaynormallyclosed(N.C.).
Relay 4: N.O./N.C.
Relay 2: N.O./N.C.
0: N.O.
0: N.O.
Alarm1parameters:accessiblefrom . . menuandidentifiedbythefinalindex1.  
Alarm2parameters:accessiblefrom . . menuandidentifiedbythefinalindex2.  
Alarm3parameters:accessiblefrom . . menuandidentifiedbythefinalindex3.  
Alarm4parameters:accessiblefrom . . menuandidentifiedbythefinalindex4.  
Alarm 3 Threshold
Alarm 3 Hysteresys
Alarm 2 Threshold
Value referred to the displayed value (decimal
pointsetby ).
Temperature input: value expressed as set by
 (°Cor°F).
Settablevalueonthefollowingranges:
Display Digits
Number Min. Limit Max. Limit
0: Al 1
disabled
0: Al 3
disabled
0: N.O.
0: N.O.
Relay 1: N.O./N.C.
Relay 3: N.O./N.C.
Alarm 3 Type
Alarm 3 Threshold
Alarm 4 Hysteresys
Alarm 4 Type
0=Alarmdisabled
1=Alarmontheminimumthreshold
2=Alarmonthemaximumthreshold
3 = Retained alarm on the minimum threshold
(theresetisnotautomatic)
4 = Retained alarm on the maximum threshold
(theresetisnotautomatic)
RelayFunctioning:
0=relaynormallyopened(N.O.)
1=relaynormallyclosed(N.C.).

MODBUS Address
Parameter NameParameter
Symbol
Parameters settable from Menu :
Serial
communication
speed
Parity control
Delay of the
response
1
Default
Value
Description and setting range
0: No
Delay
SettableValues:from1to255.
0=4800
1=9600
2=19200
0=None 1=Even 2=Odd. 0: None
Number of pauses of 6 characters each to be
entered between the end of the Rx message
andthestartoftheTx.Settablevalue: 0..255.
3=38400
4=57600
5=115200
6=1200
7=2400
8=14400
Serialcommunicationspeedinbaud: 3: 38400
Parameters settable from Menu :
Display Contrast
Parameter Name
Parameter
Symbol 10
Default
Value
Description and setting range
Values:1(minimumcontrast) to20(maximum).
Behavior in case of
Burn out (with
PT100 or TC)
0=Fullscalevalueindication
1=Startscalevalueindication
If the value is set to full scale, also the
retransmittedoutputgoestothe100%(0%ifthe
value is set to the start scale) and the maximum
(minimum)alarmsareactivated.
0: Full
scale
Indicat.
1 = Overwrite the set values with the default
values.
Default Settings
By confirming with all the parametes are saved inOK/MENÙ
flashmemoryandaftersomeinstantsthemoduleisreset.







   . . . .
  . . . .
  . . . .
Instantaneous
display value
associated to the
minimum value of
the output.
Parameter NameParameter
Symbol
Parameters settable from Menu :
Retransmitted
output type
Instantaneous
display value
associated to the
maximum value of
the output.
Display Digits
Number
49999
Min. Limit Max. Limit
-1999
0
Default
Value
Description and setting range
1000
Limits for the scaling of the retransmitted
output. Decimalpointsetby .
Settablevaluesonthefollowinglimits:
1= 0..10V 2:
4..20 mA
2=4..20mA
3=0..20mA



  . . . .
ENGLISH - 8/21MI00250 -E3

The indicators have MODBUS 16 bits (words)S312A-4-L-4R and S312A-4-H-4R lines
registers, accessiblebyRS485serial communication.
10.1 Supported MODBUS Commands
Code
03
06
16
Function
Read Holding Registers
Write Single Register
Write Multiple Registers
Description
Reading of word registers up to at a time.16
Writing of a word register.
Writing of word registers up to 6 at a time.1
: communication error with the cold junction thermometer.
: at the start may signal an error on the calibration memory. The functioning of the
moduleisblockedwhiletheModbuscommunicationisavailable.
: Instantaneous value to display < value of the 2.5% or instantaneous value to
display<minimumdisplayable.
: Instantaneousvaluetodisplay> valueofthe2.5%oriftheinstantaneousvalue>
maximumdisplayable.
The errors are directly viewed through display.
Wearegoingtolistallthepossiblesignallingswiththecorrespondentmeaning:
8. ERROR SIGNALLINGS
10. MODBUS REGISTERS
: Burn-out of the temperature sensor.
9. ORDER CODES
Code
Model
Display
Power Supply
Output relay
Description
S312A Indicator with universal analog input, 4 relays.
-4 4 digits
85..265 VAC
10..40 V / 19..28 VDC AC
4outputrelay
-H
-L -4R
ENGLISH - 9/21MI00250 -E3
Options CalibrationandconfigurationService
/T

InthetablethenotationBit[x:y] indicatesallbitsfromx toy.ForexampleBit[2:1]indicates
bit 2 and bit 1, and serves to illustrate the meaning of the various united combinations of
thevaluesofthetwobits.Defaultvaluesareindicatedwiththe*symbol.
Set the input type:
1 : Voltage, 2* : Current
3:Potentiometer,4:ThermocoupleJ
5:ThermocoupleK,6:ThermocoupleR
7:ThermocoupleS,8:ThermocoupleT
9:ThermocoupleB,10:ThermocoupleE
11:ThermocoupleN,12:PT100(2wires)
13:PT100(3wires),14:PT100(4wires)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Most significant Bit Least significant bit
Bit Index
Word (16 bits): MODBUS Register
TemperatureinCelsiusorFahrenheitdegrees:
0*:Celsius 1:Fahrenheit
The 16-bit Holding Registers have the following structure:
10.2 Holding Registers
Description ADDR R/W
Bit [15:8]: contain the module's ID: 70.
Bit[7:0]:containthefirmware'srevision.
Register containing the internal code of the
firmware.
Registerfor the setting of the input type and of
thetemperaturemeasureunit. 40003
40002
40001 R
R
R/W
REGISTER
MACHINE ID
FW_CODE
TYP_INP_CEL_FAHR
Bit [15:8]
Bit [7:1] Notused
Bit 0
HI_E Electrical Full Scale of the input in V/100,
mA/100or%/100 R/W40004
Bit [15:0] FullscaleinVolt/100,mA/100or%/100respectively
for input types 1, 2 and 3. This value must be
included between the minimum and maximum
specified for each input. Besides this parameter
defines the value of the input signal associated to
the maximum instantaneous value of view: HI_D.
Min:0, Max:9999.Default:2000.
LO_E Electrical Start Scale of the input in V/100,
mA/100or%/100 R/W
40005
Start scale in Volt/100, mA/100 or %/100
respectively for input types 1, 2 and 3. This value
must be included between the minimum and
maximum specified for each input. Besides this
parameter defines the value of the input signal
associated to the minimum instantaneous value of
view: LO_D. Min:0, Max:9999.Default:400.
Bit [15:0]
ENGLISH - 10/21
MI00250 -E3