
67
Magtrol WB/PB Dynamometers
Chapter 4 – Connections / Configuration
4.2.2
t
rAnSFormer
c
onnection
A transformer converts the power supplied by the DES into a 24 V DC current, in order to energize the
electromagnetic clutch. The connecting cable between the DES Power Supply and the transformer
is already connected to the transformer terminals 1 (brown lead) and 2 (blue lead). The yellow/green
lead is to be connected to the GND. Refer to the corresponding section of the DES Power Supply
User's Manual for more information.
brown
blue
yellow/green
brown
blue
yellow/green
Figure 4–4 Supply Cable Between 24 V DC Transformer and DES Power Supply
Connect the electrical cable to terminal 3 (brown lead) and 4 (blue lead) of the transformer to link
the electromagnetic clutch to the transformer. The polarity is unimportant as the clutch can run either
with +24 V DC or -24 V DC.
1
2
1
2
brown
blue
24 V
Supply 0 V
Figure 4–5 Control Signal Cable for WB/PB 2.7 and 43 Tandem Dynamometer Clutches
B
A
C
B
C
A
brown
blue
yellow/green
24 V
Supply 0 V
N/C
Figure 4–6 Control Signal Cable for WB/PB 65, 115 and 15 Tandem Dynamometer Clutches
Note:
The electromagnetic clutch has no common ground connection
with the transformer.