Endress+Hauser CUM 750, Operating Instructions Manual

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CUM 750 / CUS 70 Electrical connection
Hauser 13
4.3 Connection tables
4.3.1 Auxiliary energy connection
The measuring system is powered by 115 / 230VAC, 50Hz, 100 Watts, and protected by an F 1 A fine-
wire fuse (quick-blow). The auxiliary power is connected via the mains switch Q1, which is hardwired
with the 3-pin PHOENIX plug-in connector X7. Use the pin no.4 of the X5 pump terminal block for
protective earth.
Q1 mains switch connection
Pin No. Marking Description
14 L1 Phase
24 N Neutral
4(X5) PE Protective earth
4.3.2 Sensor cable connection
The measuring system is designed to connect up to four sensors. The sensors are connected using a
12-pin PHOENIX plug-in connector.
X1 terminal block connection
Pin No. Description
1 Sensor 1 positive (wt)
2 Sensor 1 screen (bk)
3 Sensor 1 negative (bl)
4 Sensor 2 positive (wt)
5 Sensor 2 screen (bk)
6 Sensor 2 negative (bl)
7 Sensor 3 positive (wt)
8 Sensor 3 screen (bk)
9 Sensor 3 negative (bl)
10 Sensor 4 positive (wt)
11 Sensor 4 screen (bk)
12 Sensor 4 negative (bl)
Note:
•
The scope of supply for the CUM 750 / CUS 70 measuring system includes 6m of cable. If a cable
extension between the transmitter and sensor is required, use a screened cable.
•
The distance between sensor and transmitter must be no more than 100m.
•
If you are using a coaxial extension cable, connect the screen to Pin 3 and the inner conductor to
Pin 1. If the coaxial cable is located in an insulation jacket, connect this to one of the terminals to
screen the sensor.
•
If you are using a screened cable as the sensor cable, only connect the screen to the earth of the
measuring instrument. Do not earth the screen to any other point to prevent fault currents flowing
into the screen and causing inductive coupling in the sensor line.
•
Never route signal lines in the same jacket or in the same harness as power cables, relay coil
drives, relay contact lines or other high voltage or high current lines.
•
Do not mount the device in the proximity of high-voltage sources. Avoid sources of magnetic fields,
e.g. large transformers or frequency converters.
Caution!
•
Do not damage the cable jacket during installation as water could find its way into the sensor!
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