WAGO 789-620 Montageanleitung Seite 2

Operating and Assembly Instructions
Please keep!
789-620 Current Sensor
Before installation and operation, please read the following instructions thoroughly and carefully.
Incorrect installation may compromise safety in the event of a failure.
1. Safety Information
1.1 General Information
Please observe the following:
- the applicable laws, standards and regulations
- the current, accepted technology standards and practices at the time of installation
- the operating instructions
- the engineering regulations
- the fact that operating instructions can only mention general regulations and that these must be observed
Before start-up, please check the device for any damage that may have occurred during shipping. The device
shall not be put into operation in the event of mechanical damage.
The devices described in these instructions shall only be installed by a qualifi ed electrician and shall only be
installed in electrical switchgear or in sealed enclosures. Improper use or failure to follow this application note
will render the warranty or guarantee null and void.
The devices shall only be installed in dry, indoor areas.
Do not install the devices on or in the vicinity of easily fl ammable materials.
2. Short Description
Product application:
Intelligent current sensor for monitoring solar plants or inverters for DC measurements within a large current
measuring range.
Operating principle:
Current sensor for contact-less current measurement with own analysis intelligence. The collection of current or
status information is made available to PLC via bus connection for further analysis.
3. Installation
CAUTION: High voltage can cause electric shock or burns.
De-energize both system and device before installation.
NOTICE: Take protective measures against electrostatic discharge (ESD) when operating the modules.
6. Communications Description
Modbus function Read holding registers (0x03)
Address measured value 0x0004
Data type measured value Integer
Process value
29128
0
I/A
80 100
WAGO Kontakttechnik GmbH & Co. KG
Hansastr. 27
E
32423 Minden
www.wago.com
4. Technical Data
Electrical Data
Measuring range
Supply voltage
Current input at 24 VDC
Measuring accuracy at room temperature
Temperature coeffi cient
Time frame for polling by master
Hot plugging
LED signaling
– green
– red
Mechanical Data
Cable feed-through
Degree of protection
Communication
Interface
Transmission channel
Protocol
Plug-in connection
Addresable
Bus length
Baud rate
Parity
Data bits
Stop bits
General Data
Ambient operating temperature
Storage temperature
Dimensions (WxHxD)
Approvals
Standards
EMC
Error Numbers:
Id Description
01 Illegal function
03 Illegal data
101 Overfl ow (current > +83A)
102 Underfl ow (current < -3A)
0...80 ADC
12...34 V
<=8 mA
<=0.5% of upper range value
<=0.01%/K
<30 ms
possible
Power
measured current
<-3 A or >83 A
15 mm/0.59 in.
IP20
RS-485
half duplex
Modbus over serial line
RJ-45
1-32
≤1200 m
19200 baud
Even
8
1
-20 °C...+70 °C
-40 °C...+85 °C
(35 x 55* x 90) mm
* from upper-edge of DIN 35 rail
CE
DIN EN 50178
EN61000-6-2
EN61000-6-4
7. RJ-45 Connector Terminal Assignment
Pin Function
1
Ub
2
4 A (data+)
5 B (data-)
7
GND
8
8. View
LED indication
Feed-through tube
RS-485 DIP switch
5. DIP Switch Adjustability
Address DIP Switch
2 3 4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Terminating resistor DIP switch 1
NOTICE:
Only set the Modbus address in the OFF
–
state.
150 Ohm
9. Additional Installation Instructions
Observe the following power supply requirements:
– use of a shielded cable
– the cable shall be grounded low resistance on both sides
289-965 and 289-966 Interface Modules are suitable for data and auxiliary power supply.
9970-0966/0789-0620 · 2009-08-27
1
5 6
Subject to design changes