Omniflex MAXIFLEX 1000 SERIESM1102A User manual

© Copyright Omniflex Data subject to change without notice M1102A Rev. 11.04.03
INSTALLATION GUIDE
MAXIFLEX 1000 SERIES
Power Supply –24Vdc I/P + Logic
Model No: M1102A
General Description
The Maxiflex M1102A Power Supply module provides maximum output power for other Maxiflex
modules via the Maxiflex base (+12V dc at 2A and +5V logic at 5A). A +5V dc pre-charge supply
is also provided on the base to allow insertion and removal of other modules while the system is
live.
The M1102A can be used with any Maxiflex base except the M1031A 5 I/O Expander Base which
does not require a power supply.
The M1102A is a 50W power supply with an input of 20V to 36V dc. The output power is split
between the +12V (on the base) and the +5V (on the base), and will cater for a fully populated
Maxiflex base under worse case conditions.
All connections to the module are made via the screw terminals located behind the door on the
front of the module. These terminals are removable for maintenance purposes, without disturbing
the field wiring.
The M1102A generates “PFAIL” status signal (active low) which indicates to the CPU that the
input voltage has fallen below a preset level (18,5V).
When the input supply rises above 19,5V dc (as compared to 18,5 for failure), all signals will
return automatically to their normal state prior to DC supply failure.
This information, like all other I/O data, is available on the network to the supervisory system.
Table 1 : LED indications
LED Colour Description
Power Green 5V and 12V supplies OK
Shutdown Red Overvoltage on the 5V dc or the 12V dc
Two LEDs located behind the LED cover of the module are only visible when they are on. Refer
to section on Field Test Procedure for field diagnosis using the LEDs.

© Copyright Omniflex Data subject to change without notice M1102A Rev. 11.04.03
Figure 1 : Layout of M1102A Module
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+

© Copyright Omniflex Data subject to change without notice M1102A Rev. 11.04.03
Figure 2 : Layout of a Maxiflex 7 I/O Base
Mechanical Installation
DAMAGE WILL RESULTO THE EQUIPMENT IF THE PSU MODULE IS PLUGGED INTO ANY
POSITION OTHER THAN THE PSU POSITION ON THE BASE.
REMOVE THE POWER TO THE PSU MODULE BEFORE INSERTING THE PSU MODULE INTO,
OR REMOVING IT FROM THE BASE.
Refer to Figure 2 for the layout of the Maxiflex base.
Electrical Installation
The following electrical connections are required to the unit:
1. DC Power
2. Earth
Refer to Figure 1 for the external connections required.
Field Test Procedure
The only test that is possible is observation of the two LEDs. Refer to the Fault/Symptom Chart
for diagnosis using the two LEDs.
Table 3 : Fault/Symptom Chart
LED Action Possible Cause Solution
Power Off 5V and 12V supplies faulty Thoroughly check the PSU.
Overvoltage on either the 5V
dc and/or the 12V dc Repair the PSU.Shutdown On
Noise-triggered shutdown Reset the supply by temporarily
switching the 24V off.
Blown fuse Replace blown fuse.
No primary supply Check whether 24V is present.
Outputs short-circuited Remove PSU from Maxiflex
base and re-check with terminal
block connected
Both Off
PSU faulty Thoroughly check the PSU.

© Copyright Omniflex Data subject to change without notice M1102A Rev. 11.04.03
Specifications
DC Supply Input
Input : 20V to 36V
Protection : 5A fuse, slow-blow
Efficiency : >80% at full load
Logic Supply Output (Base)
12V Supply (base) : 12V ±15%/2A
Logic Supply : 5,1V ±2%/0,5A
Pre-charge Voltage : 5,1V via 10Ω0,5 W resistor
Electrical Connections
Wire gauge : 2,0 mm² (maximum)*
*For manageable cabling to the modules, a conductor size of up to 0,5 mm² with a maximum
overall outside diameter of 2mm, is recommended.
Diagnostics
Power fail (PFAIL)
Front Panel Indicators
Shutdown Protection
: (LOW at input voltage U < 18,5V)
(HIGH at input voltage U > 19,5 V)
: POWER (5V and 12V ok)
SHUTDOWN
: 5V output –5,9 V < U < 6,7 V
12V output –15,0V < U < 18V
Isolation
Input/output : * 2,5 kVrms for 60 s
Input/earth : * 0,5 kVrms for 60 s
Output/earth : 0,5 kVrms for 60 s
Electromagnetic Compatibility
Impulse withstand test
Between positive and negative input
Terminals
Between either input and earth
Noise withstand test
:4 kV 1,2 µs/50 µs test pulses
: 1 kV 1,2 µs/50 µs test pulses
: 4 k V noise bursts between inputs
(In accordance with IEC 801-4, class IV)
Environmental
Operating Temperature : -25°C to +60°C (-13°F to +140°F)
Storage Temperature : -40°C to +70°C (-40°F to +158°F)
Mass
Including packaging : 544g (16 oz)
Excluding packaging : 454g (19 oz)
Ordering Information
Order Code : M1102A
* These are production test voltages only. In a fully assemble module, input/output isolation is limited by EMI
filtering components connected to earth.