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EJA120A差压变送器高性能的微差压变送器
产品信息
EJA120A型高性能的微差压变送器用于测量微小差压，然后将其转变成4~20mA DC的电流信号输出。
EJA系列支持BRAIN、HART和FOUNDATION™现场总线或PROFIBUS PA通信协议。
特性
-
的性能和稳定性
EJA系列采用单晶硅谐振式传感器技术。单晶硅对于压力或温度的变化不存在滞后现象，是非常理想的材料。单晶硅谐振式传感器将过压、温度变化和静压影响降为zui低，从而提供的长期稳定性。
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小型轻量设计
由于采用ASIC放大器设计使包装变小，以及膜盒构造和法兰的小型化，这款机型的重量降到了原有机型的一半。ASIC设计不仅减少了零件数量，而且提高了放大器的可靠性。
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现场总线通信能力
现场总线是双向数字通信系统，是配置仪表控制系统的革新技术，同时也是前景很好的更新换代产品，用于替换现在现场仪表中广泛使用的标准4~20mA模拟通信。
EJA系列提供两种现场总线模式，FOUNDATION™现场总线低压模式和PROFIBUS PA设备，以实现横河电机和其他供应商的协同工作。软件方面，EJA系列采用两个AI功能块计算差压和静压，从而实现灵活的仪表配置。
规格
EJA120A微差压变送器
E膜盒
测量范围
-1~1kPa(-4~4inH2O)
测量量程
0.1~1kPa(0.4~4inH2O)
精度
±0.2%
防护等级
IP67，NEMA 4X，和JIS C0920防浸型
防爆规格
FM，CENELEC ATEX，CSA，IECEx
输出信号
4~20mA DC或FOUNDATION™现场总线或PROFIBUS PA两线制数字通信
电源
BRAIN和HART:10.5~42V DC (本安型: 10.5~30V DC)
Fieldbus:9~32V DC (本安Entity模式9~24V DC，本安FISCO模式9~17.5V DC)
环境温度
-25~80℃(-13~176℉)
过程温度
-25~80℃(-13~176℉)
zui大工作压力
50kPa (7.25psi)
安装
2-inch管安装
接液部件材质
膜盒
SUS316L(膜片: 哈氏合金C-276)
容室法兰
SUS316
外壳
铝合金或SUS316不锈钢(可选)
型号选型
Model
Suffix Codes
Description
EJA120A
Differential pressure transmitter (for draft application)
Output Signal
-D . . . . . . . . . . . .
-E . . . . . . . . . .
-F . . . . . . . . . . .
-G . . . . . . . . . . .
4 to 20 mA DC with digital communication (BRAIN protocol)
4 to 20 mA DC with digital communication (HART protocol, refer to GS 01C22T01-00E)
Digital communication (FOUNDATION Fieldbus protocol, refer to GS 01C22T02-00E)
Digital communication (PROFIBUS PA protocol, refer to GS 01C22T03-00E)
Measurement span (capsule)
E . .
0.1 to 1 kPa {10 to 100 mmH2O} {0.4 to 4 inH2O} {1 to 10 mbar}
Wetted parts material *6
S# . . . .
[Body] [Capsule] [Vent plug]
SCS14A *1 SUS316L *2 SUS316 *7
Process connections
0 . . . . . . . . . . . . .
1 . . . . .
2 . . . .
3 . . . .
4 . . . .
5 . . . . . . . . . . . . .
without process connector (Rc1/4 female on the cover flanges)
with Rc1/4 female process connector
with Rc1/2 female process connector
with 1/4 NPT female process connector
with 1/2 NPT female process connector
without process connector (1/4 NPT female on the cover flanges)
Bolts and nuts material
A .. . . .
B .. . . .
C . . . . .
[Maximum working pressure]
SCM435 50 kPa {0.5 kgf/cm2}
SUS630 50 kPa {0.5 kgf/cm2}
SUH660 50 kPa {0.5 kgf/cm2}
Installation
-2 . . . . . . . . . .
-3 . . . . . . . . . .
-6 . . . . . . . . . .
-7 . . . . . . . . . .
-8 . . . . . . . . . .
-9 . . . . . . . . . .
Vertical impulse piping type, right side high pressure, process connector upside *3
Vertical impulse piping type, right side high pressure, process connector downside *3
Vertical impulse piping type, left side high pressure, process connector upside *3
Vertical impulse piping type, left side high pressure, process connector downside *3
Horizontal impulse piping type, right side high pressure *4
Horizontal impulse piping type, left side high pressure *4
Electrical connection
0 . .
2 . . . . . .
3 . . . . . . .
4 . . . . . . .
5 . . . . . . .
7 . . . . . . .
8 . . . . . .
9 . . . . . .
A . . . . . .
C . . . . . .
D . . . . . .
G1/2 female, one electrical connection
1/2 NPT female, two electrical connections without blind plug
Pg 13.5 female, two electrical connections without blind plug
M20 female, two electrical connections without blind plug
G1/2 female, two electrical connections and a blind plug
1/2 NPT female, two electrical connections and a blind plug
Pg 13.5 female, two electrical connections and a blind plug
M20 female, two electrical connections and a blind plug
G1/2 female, two electrical connections and a SUS316 blind plug
1/2 NPT female, two electrical connections and a SUS316 blind plug
M20 female, two electrical connections and a SUS316 blind plug
Integral indicator
D . .
E . .
N . .
Digital indicator
Digital indicator with the range setting switch *5
(None)
Mounting bracket
A . .
B . .
J .. .
C .. .
D . .
K . .
N . .
SECC Carbon steel 2-inch pipe mounting (flat type)
SUS304 2-inch pipe mounting (flat type)
SUS316 2-inch pipe mounting (flat type)
SECC Carbon steel 2-inch pipe mounting (L type)
SUS304 2-inch pipe mounting (L type)
SUS316 2-inch pipe mounting (L type)
(None)
Optional codes
/□ Optional specification
The ‘6’ marks indicate the most typical selection for each specification. Example: EJA120A-DES-92NA/□
The ‘#’marks indicate the construction materials conform to NACE material recommendations per MR01-75. For the use of SUS316 material, there may be certain limitations for pressure and temperature. Please refer to NACE standards for details.
*1: Indicates cover flange and process connector material.
*2: Diaphragm material is Hastelloy C-276 or ASTM N10276. Other capsule wetted parts materials are SUSF316L, SUS316L or ASTM grade 316L.
*3: If necessary, specify Mounting bracket code C, D or K.
*4: If necessary, specify Mounting bracket code A, B or J.