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ControlWave Instruction Manual (CI-ControlWave)
2.3.1 General Information about the PSSM
The Power Supply/Sequencer module (PSSM) takes power from an
external bulk DC power supply and then provides power through the
ControlWave housing/backplane to all installed modules.
The Power Supply/Sequencer module (PSSM) plugs into slot #1 (first
slot from the left) on the ControlWave’s backplane using connector J1.
Power
Supply
The PSSM ships from the factory configured for a nominal input supply
of 24Vdc.
Hot Swap of I/O
Modules
The PSSM supports “hot swapping” of I/O modules. This means you
can insert or remove an I/O module from the chassis while power is
live. There is
no
support for “hot swapping” of the PSSM itself, or the
CPU module.
WARNING
Do not perform “hot swapping” in a Class I, Division 2 hazardous
location.
Watchdog
Switch
PSSMs include a watchdog metal oxide semiconductor field-effect
transistor (MOSFET) switch connector. The purpose of the watchdog
connector is to trigger an external alarm or annunciator if the
ControlWave enters a “watchdog” condition in which the CPU cannot
control your process. This occurs on power-up before the ControlWave
project starts, if the unit is reset, if the ControlWave project “crashes”
or if the system loses power. See
Section 2.3.5.
Redundancy
Control Input
The same terminal block (TB1) used for watchdog control also handles
a redundancy control line to a ControlWave Redundant I/O Switcher.
See
2.3.2 PSSM Installation Overview
There are several steps you need to follow when you install the PSSM.
1.
Identify the carton holding the PSSM and remove it from that carton.
See
Section 2.2.1.
2.
Slide the PSSM into slot #1 of the housing.
3.
Tighten the captured panel fasteners to secure the PSSM in place.
4.
Unplug terminal block connector TB2 from the PSSM and wire it to
an external bulk DC power supply. See
5.
If you want to use the watchdog connector TB1, or use this
ControlWave in a redundant system, unplug TB1 from the PSSM and
wire it to an external annunciator or similar device according to
instructions in
6.
After you configure and install the CPU module in slot #2 re-connect
Revised Nov-2010
Installation
2-9