MESSKO D1272AT User Manual

BA 2082/02/10 7
4 电气连接
连接 D1272AT 数字指示器时，建议使用开放的电缆终
端夹进行 M3 螺纹连接。参照附录中的连接图执行。
4.1电源
通过连接端 13
和 14 进行连接。电压：100 – 240 V AC
±
10 %，
50/60 Hz；最大 7.5 VA。
4.2传感器输入
连接输入端信号时，确保设备的测量范围符合电路的最
大负荷。
Pt100：
Pt100 输入端设计用于通过三线技术连接 Pt100 传感
器。通过端子 1 和 2 进行连接。均压线与端子 3 连接。
如果要连接 2 线传感器，端子 2 和 3 必须短路。参见
图 3。
4-20mA，有源传感器：
要连接的 4-20 mA 传感器是有源传感器时（即，不需要
其他电源电压），将传感器与端子 1 (-) 和端子 4 (+) 连
接。参见图 4。
4-20mA，无源传感器：
D1272AT 数字指示器装有为传感器/信号转换器供电
的模块。无源传感器（例如指针温度计 MT-ST160SK/
TT）可用此供电。
端子 10 (-) 和端子 12 (+) 有约 24 VDC 的传感器电源
可用。
连接传感器时，电压必须连接。为此，跨接端子 1 和
10，并将输入传感器与端子 4 (-) 和 12 (+) 连接。参
见图 5。
4 Electrical Connection
For the connection of the D1272AT digital indicator, we
recommend using open cable lugs for M3 screw-type connec-
tions. Follow the connection diagrams in the appendix.
4.1 Voltage supply
The connection is performed via the connection terminals 13
and 14. Voltage: 100 – 240 V AC
±
10 %, 50/60 Hz; max. 7.5 VA.
4.2 Sensor input
When connecting the input signal, make sure that the measu-
ring ranges of the devices conform to the maximum load of
the circuit.
Pt100:
The Pt100 input is designed for connection of a Pt100 sensor
by means of a 3-wire technology. The connection is made
via the terminals 1 and 2. The equalizing line is connected to
terminal 3. If a 2-wire sensor is to be connected, terminals 2
and 3 must be short-circuited. See gure 3.
4-20 mA, active sensor:
When the 4-20 mA sensor to be connected is active (i.e., no
further supply voltage is needed), connect the sensor to termi-
nal 1 (-) and terminal 4 (+). See gure 4.
4-20 mA, passive sensor:
The D1272AT digital indicator is equipped with a module for
powering a sensor/signal transducer. A passive sensor (e.g.,
pointer thermometer MT-ST160SK/TT) can be powered with
this.
The sensor power of approx. 24 VDC is available on terminal 10
(-) and terminal 12 (+).
The voltage must be looped in when the sensor is connected.
For this, jumper terminals 1 and 10 and connect the input
sensor to terminals 4 (-) and 12 (+). See gure 5.
   小心
电气连接只能由合格且经过培训的人员执行，该人
员应事先查看相关国家/地区适用的安全法规。
CAUTION
The electrical connection may only be performed by qua-
lied, trained personnel who have been instructed in the
applicable safety regulations of the particular country.
4 电气连接/Electrical Connection

MESSKO D1272AT Specifications

General

Brand	MESSKO
Model	D1272AT
Category	Measuring Instruments
Language	English