®
CPA/CPD Series Data Sheet
200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters
BCD20005-G Rev. AC, 29-Oct-08 Page 17 of 20 www.power-one.com
Safety and Inst allation Instructions
Connector Pin Allocation
The connector pin allocation table defines the electrical
potentials and the physical pin positions on the Positronic
connector. Pin no. 45 (protective earth) is a leading pin,
ensuring that it makes contact with the female connector
first. Fig. 18
Pinout of the front connector
10087a
2468 101214161820
1357911
13 15 17 19
45 47
46
23 26 29 32 35 38 41 44
22 25 28 31 34 37 40 43
21 24 27 30 33 36 39 42
Connector: Positronic PCIH47M400A1 or similar
Mating female connector: Positronic PCIH47F300A1 or similar
Installation Instructions
These converters are components, intended exclusively for
installation within other equipment by an industrial
assembly process or by a professionally, competent
person. Installation must strictly follow the national safety
regulations in respect of the enclosure, mounting, creepage
distances, clearance, casualty markings, and segregation
requirements of the end-use application.
Connection to the system shall be made via the mating
female connector (see fig. 16). Other installation methods
may not meet the safety requirements. Check for hazardous
voltage before altering any connections.
The converters are provided with a leading pin no. 45, which
is reliably connected to the case. For safety reasons it is
essential to connect this pin to the protective earth of the
supply system; see also Safety of Operator-Accessible
Output Circuits.
The Vi input (pin no. 46) is internally fused. This fuse is
designed to protect the converter in case of over current,
but may not be able to satisfy all customer requirements.
External fuses in the wiring to one or both input pins (no. 46
and/or no. 47) may therefore be necessary to ensure
compliance with local requirements.
Important: If the inhibit function is not used, pin 39 (i) should
be left unconnected to enable the outputs. Enable Pin 27
(EN#) should be connected to pin 22 (RTN) to enable the
outputs.
Do not open the converters, or the warranty will be
invalidated. Make sure that there is sufficient airflow
available for convection cooling. This should be verified by
measuring the case temperature, when the converter is
installed and operated in the end-use application. The
maximum specified case temperature TC max should not be
exceeded.
Make sure that a converter failure (e.g., by an internal short-
circuit) does not result in a hazardous condition.
Table 12: Pin allocation of the front connector
Pin1
L ength
2
Signal Description Pin1
Length
2
Signal Description
name name
1-4 B Vo1 Output 1 32 C n.c. Do not connect
5-12 B RTN Return (Vo1 and Vo2) 33 C Vo2SENSE Vo2 remote sense
13-18 B Vo2 Output 2 34 C SRTN Sense return
19 B RTN Return (Vo3) 35 C Vo1SHARE Vo1 current share
20 B Vo3 Output 3 36 C Vo3SENSE Vo3 remote sense
21 C Vo4 Output 4 37 C n.c. Do not connect
22 C RTN Return 38 C DEG# Degrade signal
23 C Reserved Reserved 39 C INH# Inhibit
24 C RTN Return (Vo4) 40 C n.c. Do not connect
25 C n.c. Do not connect 41 C Vo2SHARE Vo2 current share
26 C Reserved Reserved 42 C FAL# Fail signal
27 D EN# Enable 43 C n.c. Do not connect
28 C n.c. Do not connect 44 C Vo3SHARE Vo3 current share
29 C n.c. Do not connect 45 A
3
CGND Chassis ground
30 C Vo1SENSE Vo1 remote sense 46 A +DCIN4 ACN5Positive input 4 Neutral line5
31 C n.c. Do not connect 47 A –DCIN4 ACL5Negative input4 Line input (phase)5
1Pin numbers shown are for the female backplane connector
2A = very long pins, B = long pins, C = short pins, D = very short pins.
3Pin 45 of the female connector is leading, ensuring that chassis ground makes contact first.
4CPD models (DC input)
5CPA models (AC input )