Yokogawa SC25F User Manual
Page 9
IM 12B6J1-41E-E
9
2.6 Transmission signal (Data + and Data -)
General
: Bi-directional digital communication (RS 485) with limited
MODBUS support
Data rate
: 9600 b/s (8,E,1)
Output function
: pH or temperature compensated pH
Temperature
Junction resistance
Sensor details (Model, Serial Number, production date)
Sensor calibration data (zero, slope, temperature offset)
Sensor status signals (e.g. Glass impedance detection)
Note: The output functions and settings of the sensor are accessible using a dedicated
device such as the Yokogawa FLXA analyzer.
2.7 Power supply (Supply+ versus Supply Gnd)
Operating range
: +2.7 to +3.6 VDC
Power consumption
:
≤ 20 mW
Pin #
Signal description
1
Data -
2
Data +
3
Supply +
4
Shield
5
Supply Gnd
2.8 Regulatory standards
CE
: Decision 768/2008/EC
- ATEX
: Directive 94/9/EC, as amended by Regulation (EC) no. 1882/2003
-
Certificate no.
: DEKRA 11ATEX0064 X for
II 1 G Ex ia IIC T3...T6 Ga
-
Electrical data
: For sensor input circuits (by connector) connected to a certified
intrinsically safe circuit with the following maximum values
:
Ui = 6.1 V; Ii = 230 mA; Pi = 1.2 W; Li = 4 µH; Ci = 30 µF
::
or Certified intrinsically safe Yokogawa transmitter Model FLXA21.
-
Special conditions (X) : T6 for Tamb. -40 °C to +60 °C
T5 for Tamb. -40 °C to +75 °C
T4 for Tamb. -40 °C to +110 °C
T3 for Tamb. -40 °C to +125 °C
Electrostatic charges on the sensor enclosure shall be avoided.
- Pressure
: Directive 97/23/EC, as amended by Regulation (EC) no. 1882/2003
-
Applying article
: 3.3 (Sound Engineering Practice)
Damaging the screw thread of the sensor might influence the
maximum process pressure.
- EMC
: Directive 2004/108/EC
IEC 61326-1: 2005 Class A (control and laboratory use)
IEC 61326-1: 2005 (use in industrial locations)
- Low Voltage
: Directive 2006/95/EC
Sensor contains glass parts which if broken can cause cutting injuries.
- WEEE
: Directive 2012/19/EU
- RoHS
: Directive 2011/65/EU
IECEx
Applying standards
: IEC 60079-0: 2007; IEC 60079-11: 2006; IEC 60079-26: 2006
Certificate no.
: IECEx DEK 11.0065X for Ex ia IIC T3...T6 Ga
2
1
5
4
3
Fig 1: Sensor connector (front view)
with gold plated contacts