Yokogawa EJX118A - Manual (Page 46)

<8. General Specifications>
8-4
IM 01C25H01-01E
Supply & Load Requirements “◊”
(Optional features or approval codes may
affect electrical requirements.)
With 24 V DC supply, up to a 550 Ω load can be
used. See graph below.
E-10.5
0.0244
Power supply voltage E (V DC)
600
250
R (Ω)
10.5 16.6 25.2 42
External load
resistance
Digital
Communication
range
BRAIN and HART
R=
F0803.ai
Figure 8.3 Relationship Between Power Supply
Voltage and External Load Resistance
Supply Voltage
10.5 to 42 V DC for general use and flameproof
type.
10.5 to 32 V DC for lightning protector (Option
code /A).
10.5 to 30 V DC for intrinsically safe, type n or
non-incendive type.
Minimum voltage limited at 16.6 V DC for digital
communications, BRAIN and HART
Load (Output signal code D, E and J)
0 to 1290 Ω for operation
250 to 600 Ω for digital communication
Communication Requirements “◊”
(Safety approvals may affect electrical
requirements.)
BRAIN
Communication Distance
Up to 2 km (1.25 miles) when using CEV
polyethylene-insulated PVC-sheathed cables.
Communication distance varies depending on
type of cable used.
Load Capacitance
0.22 µF or less
Load Inductance
3.3 mH or less
Input Impedance of communicating device
10 kΩ or more at 2.4 kHz.
HART
Communication Distance
Up to 1.5 km {1 mile} when using multiple
twisted pair cables. Communication distance
varies depending on type of cable used.
Use the following formula to determine cable
length for specific applications:
L= –
65 × 10 6
(R × C)
(C
f
+ 10,000)
C
Where:
L = length in meters or feet
R = resistance in Ω (including barrier
resistance)
C = cable capacitance in pF/m or pF/ft
C
f
= maximum shunt capacitance of receiving
devices in pF/m or pF/ft
EMC Conformity Standards ,
EN61326-1 Class A, Table2 (For use in industrial
locations)
EN61326-2-3
 Physical Specifications
Process connections
See the following table.
Table 8.2 Flange size and rating
Process
connection
style
Size Flange
Flush type
3-inch
2-inch
1 1/2-inch *1
JIS 10K, 20K, 40K, 63K *2
ANSI Class 150, 300, 600
JPI Class 150, 300, 600
DIN PN10/16, 25/40, 64
Extended
type
4-inch
3-inch
JIS 10K, 20K, 40K *2
ANSI Class 150, 300
JPI Class 150, 300
DIN PN10/16, 25/40
Combination
type *3
(Extended
and Flush)
High pressure
side: 4-inch
Low pressure
side: 3-inch
JIS 10K, 20K
ANSI Class 150, 300
JPI Class 150, 300
DIN PN10/16, 25/40
*1: Flushing connection rings are always attached.
*2: Applicable for EJ438 only.
*3: Applicable for EJ118 only.
Gasket Contact Surface
See the following table.
Table 8.3 Gasket contact surface
Flange
JIS/JPI/
DIN
ANSI
Wetted parts material code
SW
SE
SY
HW
TW
UW
SW
SE
SY
HW
TW
UW
Gasket contact
Surface
Serration *1 — —  —
Flat
(No serration)
   
 : Applicable, —: Not applicable
*1: ANSI B16.5