Page 2
Universal Measuring Device UMG 500A
Content
Application
3
Construction features
3
Functional description
3
Installation
4
Auxiliary voltage
4
Measurement inputs
4
Relay outputs K1 and K2
4
Analogue output “0..20 mA”
4
“Clear work” input
4
“Remote” input
4
“RS 485” Serial interface
4
Commissioning
5
Functional plan
6
Factory presettings
7
Special versions
7
Maintenance note
7
Key functions and Programming
8
“+” key
8
“-” key
8
Primary current of current transformer
8
Voltage transformer
8
Selection of outer conductor L1, L2 or L3
8
Selection key “sum”
8
Voltage
9
Current
9
Mean Current
9
Apparent power
9
Real power
9
Mean real power
9
Measuring period
9
Remaining time
9
Reactive power
10
Real work
10
Reactive work
10
Frequency
10
Power factor
10
Harmonic wave content of voltage
10
Analogue output
11
Work pulses
11
Peak values
12
Date and time
12
Threshold contacts
12
Device Address
12
Software release
12
Serial interface
13
Connection PC to interface converter
13
Communication parameters
13
Bus connection
13
Setting the device address
14
Communication protocol
14
Technical data
15
Dimensions
15
Connection example (3-wire, Aron-connection) 16
Connection example (4-wire)
17
Connection example (Aron-connection)
18
Edition notes
Date
refers to page(s) no.:
05.07.94
First edition
01.11.94
Second edition
09.06.95
All pages affected
08.10.96
Application as prescribed, Installation,
Current mean value
