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PSX Rackmount Power Supply - Installation and Operation Manual
Field wiring connections are made on the rear panel after installing
the PSX enclosure into the rack. Field wiring connections are made
to the removable terminal strips, which accept AWG 12-22 wire. The
back panel is also where the main AC power and optional ethernet
connections are made.
1.4.1 Field Wiring
The PSX Rackmount series has terminals for various inputs
and outputs as follows:
Controlled Outputs - PSX-ISUSE only
These terminals provide the distributed, controlled outputs
to the load devices. Depending on model, there will be ei-
ther 8 or 16 output zones. The output zone numbers will
correspond with the numbering of the zones on the front
panel. Polarity is indicated adjacent to each terminal. The
output is configured by setting the front and rear panel
jumpers and switches.
Control Inputs - PSX-ISUSE only
These are the zone input terminal strips. The terminals are
labeled on the back panel near the terminal strip.
•Whenusingadrycontactinput,thecontactisconnected
across the A and B terminals. When configured for a dry
contact input, it is normal to measure a voltage across
these two terminals. This voltage is current limited and will
not damage the activation contact.
•Whenusingavoltageinput,thevoltageisconnectedto
the B terminal. The activation voltage must be common
grounded with the system voltage. The activation voltage
must be between 12 and 24VDC nominal. Do not connect
anything to the A terminal of the input.
•Whenusinganopencollector(transistor)input,placea
jumper across the A and B terminals and connect the open
collector to the B terminal. Note that the input source must
be common grounded with the enclosure power source.
Battery (Bat+, Bat–)
This pair of terminals is for connection to a backup battery set, if
required for the installation. Polarity is noted adjacent to the termi-
nals. These terminals also charge the battery set.
NOTE: Observe polarity or damage to the system will occur.
Ensure the voltage of the battery set matches the voltage of
the power supply.
NOTE: It is the installer's responsibility to determine the prop-
er battery size for the installation. See the Specifications sec-
tion for battery standby current requirements.
DC1+, DC1–
The main DC output of the PSX power supply. The full cur-
rent of the PSX is available on these terminals at all times
and is unaffected by the FAI input.
DC2+, DC2–
The DC2 output may optionally be controlled by the FAI in-
put. The full current of the PSX is available on these termi-
nals. The DC2 output may be set to power up when an FAI
signal is received or to drop power when an FAI signal is
received by changing the position of the DC2 fuse on the
PSX before installing the PSX into the rack.
AC Fault (ACF)
These terminals provide the AC Fault relay output from the
PSX power supply. This relay signals when the internal PSX
power supply detects a low or missing AC input voltage.
From the factory this output is set to provide a CLOSED
connection when there is no fault. During a fault condition,
the connection between these terminals will OPEN.
To reverse this operation, see Section 1.3.6 of this manual.
System Fault (SF)
These terminals provide the System Fault relay output
from the PSX power supply. This relay signals when any
of the following conditions occur:
• Missing Battery (If BAT DET jumper is ON)
• Earth Ground Fault (If EARTH GND DET jumper is ON)
• Battery voltage out of range
• DC output voltage out of range
• Ruptured fuse
• Accessory Board Fault
• Internal Fault
From the factory this output is set to provide a CLOSED
connection when there is no fault. During a fault condition,
the connection between these terminals will OPEN.
To reverse this operation, see Section 1.3.6 of this manual.
FAI Input (V+, I+, I–, V–, L, L)
These terminals accept the optional FAI / Access Control
input for controlling the outputs. See FAI Input Usage dia-
grams on next page for more information.
Connections are as follows:
• L Terminals Latch Reset contact input. If a latching FAI In-
put is desired, a normally closed contact is placed across
these terminals. When the FAI Input is activated, it will
latch in the activated state until this contact is momentarily
opened. If the latching feature is not desired, leave these
terminals open.
• V+ & V– Terminals These terminals are a low-current aux-
iliary voltage output to be used with a dry contact or open
collector for activating the FAI Input.
• I+ & I– Terminals These terminals are the input terminals
for the FAI Input. The FAI input is activated when a voltage
between 9 and 30 volts is applied across these terminals in
the correct polarity.
1.4 Making the Wiring Connections
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