HARDWARE MANUAL Document reference MAMPS-HW/E
VM600 machinery protection system (MPS) Edition 18 - March 2022
8-10
Rack safety requirements
INSTALLATION
8.3.3.1 Supply wiring for VM600 racks with external power supply redundancy
For VM600 racks supporting external power supply redundancy (that is, mains power-supply
system redundancy), there are additional supply wiring considerations/requirements.
For a VM600 rack using a DC-input version of the RPS6U rack power
supply, the DC-mains power supply lead (power cord) must meet the
following requirements.
For later versions of the RPS6U (PNR 200-582-x00-02h or later) that define
the power as a total maximum output power of 330 W, the requirements are:
• The DC-mains power supply lead shall be rated for 30 A
DC
minimum
current at 105°C for an RPS6U with a 24 V
DC
input.
• The DC-mains power supply lead shall be rated for 6 A
DC
minimum
current at 105°C for an RPS6U with a 110 V
DC
input.
For earlier versions of the RPS6U (PNR 200-582-x00-01h or earlier) that
define the power as a rated power of 300 W, the requirements are:
• The DC-mains power supply lead shall be rated for 23 A
DC
minimum
current at 105°C for an RPS6U with a 24 V
DC
input.
• The DC-mains power supply lead shall be rated for 5 A
DC
minimum
current at 105°C for an RPS6U with a 110 V
DC
input.
For all versions of the RPS6U (PNR 200-582-x00-02h and
PNR 200-582-x00-01h), additional requirements are:
• The DC-mains power supply lead shall be at least 2.5 mm
2
(no. 12 AWG)
for an RPS6U with a 24 V
DC
input.
• The DC-mains power supply lead shall be at least 1 mm
2
(no. 16 AWG)
for an RPS6U with a 110 V
DC
input, support 2700 V
AC
/ 1 minute and have
a minimum insulation thickness of 0.4 mm.
The external mains power supply leads (power cords) must be permanently
connected.
During installation:
• For AC-input versions of RPS6U, the ON/OFF switch on the associated
rear panel must be off when connecting/wiring external mains power
supply leads (power cords).
• For DC-input versions of RPS6U, the external circuit breaker, switch or
equivalent must be off when connecting/wiring external mains power
supply leads (power cords).
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