EJA120A EJA120A差压变送器

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

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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.
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