Publication 1747-UM011G-EN-P - June 2008
Special Grounding Considerationsfor dc Applications using
1746-P3 (previous to revision B)
This information describes special wiring considerations for the 1746-P3
power supply that is not labeled as revision (REV) B or later-.
Keep wire length as short as possible.
ATTENTION
Any voltage applied to the 1746-P3 DC NEUT terminal will be
present at the SLC logic ground and the processor DH-485 port.
To prevent unwanted potentials across the logic ground of the
controller and/or damage to the SLC chassis, the DC NEUTRAL
of the external dc power source must be either isolated from
the SLC chassis ground, or connected to earth ground.
SLC Logic Ground
SLC 500 Chassis Processor
1746-P3
Door
A jumper wire is recommended
between the DC NEUT and Chassis
Ground of the external power source.
Earth Ground
Not Used DH-485
Port
Earth Ground
External dc Power Source
+24 VDC
DC NEUT
Chassis
Ground
Not Used
+24V dc
DC Neut
Chassis
Ground
Safety GroundTotal PPS180-40
Total 7000-M0
emecanique VR2SA2121
Sütron TP32ET-01/029049
Sütron BT20N BT20N/081030
Stromag ADC 006.3
SMAK Baugruppe SMAK GL 4904.3200
SK1 Baugruppe SK1 GL 4905.5400
Control Techniques 140X8/16
Control Techniques 140X14/28 28A
Control Techniques 140X14/28 DCD AS-IS
Control Techniques 140 X 14/28 140X14/28
Control Techniques 2400-8000 24008000
Control Techniques 2400-8001
Control Techniques 2450-4000
Control Techniques 2450-4012
Control techniques 566-860-000
Control Techniques 6150
1756-EN2T 1756-EN2T
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Control Techniques 6M4Q30
Control Techniques 75EZB300CACAAA 876248
Control Techniques 8200-00048
Control Techniques 8200-00161ENC 820000161ENC
Control Techniques 94501MVO
Control Techniques 9500-8411
Control Techniques 9500-8602
Control Techniques V75 ICD
Control Techniques V4500-R
Control Techniques VB400
Control Techniques VBE220-R ICD001
Control Techniques VB75-ICD-NP
Control Techniques CD2/CDII
Control Techniques CTIU100K-001