BCD20005-G Rev AH, 10-Nov-2014 Page 17 of 19
MELCHER
The Power Partners.
CompactPCI® CPA, CPD Series Data Sheet
200 – 550 Watt AC-DC and DC-DC Converters
Table 13: Pin allocation of the front connector
Pin1
Length
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 +DCIN 4 ACN 5Pos. DC input 4 Neutral line 5
31 C n.c. Do not connect 47 A –DCIN 4 ACL5Neg. DC input 4 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)
Safety and Installation 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.
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.
The input –DCIN or ACL (pin no. 47) is internally fused; see
Input Fuse and Protection. This fuse is designed to break an
overcurrent in case of a malfunction of the converter and is not
customer-accessible.
External fuses in the wiring to one or both input lines (pin 47
and/or pin 46) may be necessary to ensure compliance with
local requirements. A built-in second fuse in the neutral line
(pin 47) is available as option F for CPA500 models.
A second fuse in the wiring to the neutral line or option F may
be needed if:
• Local requirements demand an individual fuse in each
source line
• Neutral and earth impedance is high or undefined
• Phase and neutral of the mains are not defined or cannot
be assigned to the corresponding terminals.
Caution:
Installation must strictly follow the national safety regulations.
Models with option F: Caution! Double-pole/neutral fusing.
Do not open the converters, or the warranty will be invalidated!
Important: If the inhibit function is not used, pin 39 (i) should be
left open-circuit to enable the outputs. Enable Pin 27 (EN#)
should be connected to pin 22 (RTN) to enable the outputs.
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.
Fig. 19
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