User guide

A120 Power Supplies
890 USE 108 00 August 2001 187
PRTU252(C) and PRTU258(C) Power Supply Modules
About the Power
Supplies
These modules are AC input isolated power supplies with user supplied battery
backup for a Compact 984 CPU installed in a DC environment. They are also
suitable for use with the A120 I/O. Conformal coated versions, the PRTU252C and
PRTU258C, are available.
The PRTU252(C) accepts input voltages from 90 to 264 VAC or 8 to 14.5 VDC. It
supplies 24 VDC to the CPU at 2.0A continuous current.
The PRTU258(C) accepts input voltages from 90 to 264 VAC or 30 to 70 VDC. It
supplies 24 VDC to the CPU at 2.0A continuous current.
These supplies may be inserted in any available I/O slot in the backplane just like a
standard A120 I/O module, but connections are not made through the backplane.
Connections are made to the appropriate terminals located on the front of the Power
supply.
The following figure shows the front view of the PRTU252(C) power supply.
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RTU252
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+
-
+
-
8 to 14.5
Power Lost
VDC IN
L
N
AC IN
+
-
24 VDC
OUT
Signal
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