Installation Instructions

Document Number: 129-217
Installation Instructions
September 24, 2018
Siemens Industry, Inc. Page 3 of 6
Wiring
CAUTION:
Use care when removing the knockout. Do not
damage the circuit board.
Do not use autotransformers. Use earth ground
isolating step-down Class 2 transformers.
Determine supply transformer rating by summing total
VA of all actuators used. The maximum rating for a
Class 2 power supply circuit is 100 VA.
Actuator
Power
Consumption
Actuators Per
Class 2 Supply Circuit*
(80% of Transformer VA)
SKD6…U
17 VA
4
SKD82.50U
13 VA
8
SKD82.51U
18 VA
5
* Operating more actuators requires additional
transformers or separate 100 VA power supplies.
Wiring Diagrams
SKD60U/SKD62U Figures 9 and 10
SKD82.50U/51U Figures 11 through 13
SKD6…U
1
2
Figure 9. SKD6…U.
DIP
Switches
1
Selection of
Control Signal
2
Selection of Flow
Characteristic
ON
4 to 20 mA
Modified*
OFF
(Factory Setting)
0 to 10 Vdc
Default
*Changing the default setting will modify an equal
percentage valve to a linear flow characteristic. When
set to default, the flow characteristic is determined by
the valve body.
Figure 10.
Connecting Terminals
24 Vac
G
System Potential (SP)
G0
System Neutral (SN)
Y
Control Input: 0 to 10 Vdc or 4 to 20 mA
(DIP switch selectable)
Z
Override Control
(See Technical Instructions 155-180P25)
M
Measuring Neutral
U
Output for 0 to 10 Vdc or 4 to 20 mA
measuring voltage. It will match the input
signal type.
The position output signal U will switch from 0 to 10
Vdc to 4 to 20 mA when a 4 to 20 mA input signal is
selected and used on the terminal.
Wiring for SKD82…U
Figure 11. Location of Terminals.