Emerson ControlWave Instruction Manual page 143

Wiring Digital Inputs to indicate Power Supply Failure
Table P-2. Wiring a Digital Input to Indicate Power Supply Failure
Power Supply
1
2
Hot-swapping a Power Supply
WARNING
Revised Nov-2010
Figure P-8. – Location of TB2 on ControlWave I/O Switcher
Each power supply on the RPSSM drives a solid state relay contact
closed during normal operation. In a failure, this contact opens. You can
optionally wire the contact to a digital input (either externally or
internally sourced) to provide indication of a power supply failure. You
must wire the contact differently depending upon whether the digital
input supports internally sourced or externally sourced power. See Table
P-2 for details.
Digital Input (Internally Sourced)
TB3-1 SYSTEM GND
TB3-2 DIGITAL INPUT
TB3-3 SYSTEM GND
TB3-4 DIGITAL INPUT
DO NOT ATTEMPT hot swapping in a Class I, Division 2 hazardous
location.
Each power supply has a Power Good indication LED (see Figure P-10).
If this light goes out while the power supply is on, the power supply's
output voltage is out of specification. This could occur if the supply is not
properly seated in the slot or if its fuse has blown. Remove the power
supply to check for these conditions. If neither condition has occurred,
you may need to replace the power supply.
Installation and Use
Redundant Power Supply Sequencer Module (RPSSM)
Digital Input (Externally Sourced)
TB3-1 SYSTEM PWR
TB3-2 DIGITAL INPUT
TB3-3 SYSTEM PWR
TB3-4 DIGITAL INPUT
P-7