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Power Supply Diode Module
with Voltage Sensing
This module provides two high current diodes
used to connect power supplies in parallel. If one
power supply fails or is shutdown the diodes
prevent that supply from drawing current from the
remaining supply. This is done primarily for
redundancy but if the supplies are adjusted to the
same output voltage it can also be used for
increased load current.
The module features a voltage sensing circuit. A
user adjustable set point determines the minimum
acceptable voltage level (the same for each
power supply). If either supply drops below this
level a relay contact will provide a fault signal.
This feature allows a DCS or PLC to know the
status of the power supplies. It can also be used
to drive an annunciator or other alarm device.
Features:
!
!
!
!
30A, 24Vdc rating
user adjustable set point
1 form C (SPDT) alarm contact
mounts on both 32mm and 35mm DIN rails
Catalog number: 9987390000
United States
Canada
Weidmuller, S.A. de C.V.
Weidmuller Inc.
Weidmuller Ltd.
Ave. Ingenieros Civiles #204
821 Southlake Blvd.
10 Spy Court
Conjunto Industrial Chachapa
Richmond, Virginia 23236
Markham, Ontario L3R 5H6
72990 Puebla, Pue. Mexico
Telephone: (800) 849-9343
Telephone: (800) 268-4080
Telephone: (222) 286 62 47
Facsimile: (804) 379-2593
Facsimile: (905) 475-2798
Facsimile: (222) 286 62 42
Email: [email protected]
Email: [email protected]
Website: www.weidmuller.com
Website: www.weidmuller.ca
Power Supply Diode Module with Voltage Sensing
Specifications
Input:
Voltage
Current
Output:
Current
Alarm:
Voltage
Current
Configuration
Set point
Other:
Voltage drop input-output
Operating temperature
Terminations
Input / Output
Alarm contact
24Vdc typical
30A per input
30A max.
125Vac max.
6A max.
1 form C / SPDT
14-24Vdc, ±5% typ.
0.38V typ.
0-500C (400C rise above ambient @ 30A)
22-8 AWG
26-12 AWG
Ordering Data
Diode Module with Voltage Sensing
Cat. No.
9987390000
R12
IC1
OFF
R6
R11
R10
R5
22V
3
OUTPUT
TB3
D2
R8
D1
20V
TB4
OK
D5
R13
18V
14V
2
+
D6
1
+
-
R7
CSA pending / UL recognized
23V
Approvals
-
-
+
C1
K1
+
R2
R3
R9
+
TB1
D4
R1
R4
D3
70mm
Z1
110mm
Height: 90mm
Specifications subject to change without notice. 99990268 - 09/02 Printed in Canada
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