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IM08302001E
Rev 02
Effective: March 2004
Installation Instructions — Conveyor Sensors Power Supply
The Sensor Power Supply was specially designed to be used with Cutler-
Hammer’s Zero Pressure Accumulation products, but is suitable for use in
a wide variety of material handling applications. The unit delivers 100 W at
27V DC and supports easy AC and DC-side wiring. The power supply is a
tamper-resistant, rugged component easily mounted to a conveyor side-
channel or support. The power supply is fully sealed for use in harsh
environments.
Junction box features are integrated into the housing of the supply to provide
for AC connections. Therefore, it is not necessary to mount the supply in a
separate enclosure to comply with applicable wiring codes.
Mount the supply to a secure surface using integral mounting flanges and
3/8 inch mounting hardware (not provided). Mounting holes are set on 3
inch centers. Remove applicable gasketed cover and wire as indicated by
the wiring diagram and as described below. Route wiring through
knockouts in the enclosure and secure using threaded 1/2 inch NPT
conduit fittings or cord grips as required (not provided). Replace the
gasketed cover, tightening 6 screws to 9-10 inch-pounds.
DC Wiring
Output terminals provide the DC Power and Release Connection for use
with an accumulation sensor system. The two terminals are wired in
parallel to provide a convenient extra connection point. Connect to the
sensor system using cable accessories from Table 3 and considering the
wiring arrangement pros and cons from Table 2 (both at right).
Release Wiring and Operation (if installed)
There are two release modes commonly used in Zero Pressure
Accumulation conveyor systems. Slug or Train Release causes the
conveyor zones to drive without singulation or accumulation. Singulate or
Zone Release causes the discharge zone to drive, thereby releasing
product from the conveyor. This release function only effects the
discharge zone; all other upstream zones continue to operate normally.
To use the release function, wire external release signal to “Release In”.
This signal can be 15-30 VDC or 115 VAC.
INTRODUCTION
GENERAL INSTALLATION AND MOUNTING
PS256B-01B1
Standard selectable release
PS256B-04B1
High-current sinking release
PS256B-05B1
PS256B-04B1 with 12mm threaded DC connector
MODELS COVERED IN THIS MANUAL
IN ORDER TO AVOID ELECTRIC SHOCK OR OTHER POSSIBLE INJURY:
• DO NOT USE THIS PRODUCT FOR HUMAN SAFETY APPLICATIONS. IT
WAS NOT DESIGNED, TESTED OR RECOMMENDED FOR THIS USE.
• DO NOT USE THIS PRODUCT IN HAZARDOUS LOCATIONS (E.G.
EXPLOSIVE ATMOSPSHERES). IT WAS NOT DESIGNED, TESTED OR
RECOMMENDED FOR THIS USE.
WARNING
Power Monitor Wiring (if installed)
This contact is provided to allow monitoring of the DC Supply by a remote
device. This contact opens when the DC power is off or has failed due to
short-circuit or other conditions. Wire as indicated by the wiring diagram.
See specifications for electrical operation.
NOTE: For Slug Release, connect the “Slug” wire of an appropriate release
cable in the table above to the power supply release terminal. For
Singulate Release, connect the “Comms” wire of an appropriate release
cable in the table above (physically connected to the discharge sensor) to
the release terminal.
TABLE 1 - SWITCH POSITIONS FOR PS256B-01B1
SLUG
SINGULATE
SENSOR TYPE
RELEASE
RELEASE
14256 Series
Sinking
N/A
14276 Series
Sinking
Sinking
14266/14286 Series (NPN)
Sinking
Sourcing
14266/14286 Series (PNP)
Sourcing
Sourcing
E68-SV Series
Sinking
Sinking
3.
Connect the sensor system to the “Release Out” terminal on the DC
terminal strip using one of the wiring arrangements described
(including pros and cons) in Table 2 below, and the requisite cable
accessories listed in Table 3 below.
TABLE 2 - WIRING ARRANGEMENTS
++
--
Allows for the longest run of
For singulated product
sensors from a single power
release from the
supply.
discharge zone, an
additional release cable
is required.
Allow for power, slug, and
Reduces the total
singulate release with a single
number of zones
cable connection to the power
from a single power
supply.
supply.
Provides for slug release of
product from the conveyor.
Center Tap
End Tap
ON
ON
Normal Operation
Verify load properly connected to DC
terminals.
ON
OFF
DC Supply OFF
The supply is likely in short-circuit
protection mode.
1. Locate and remove short or overload.
2. Turn OFF AC input power for 2 minutes.
3. Restore AC input power.
OFF OFF
No AC applied or
primary fuse
blown
TROUBLESHOOTING
The supply provides two indicators to allow for easy troubleshooting:
AC
IN
DC
OUT SUPPLY STATUS
TROUBLESHOOTING STEPS
Verify AC voltage is present and is wired
properly. If problem persists, the main
fuse is blown or supply is physically
damaged and must be replaced.
TABLE 3 - CABLE ACCESSORIES
Center Tap
Power & Slug Release
Singulate Release
142x6
BUS266PWR-01B1
BUS266REL-01B1
E68...-xyC
E68-SVAPWR-C2
E68SVAREL2-C2
E68...-xyP
E68-SVAPWR-P2/-P02
E68SVAREL2-P2
End Tap
Power, Slug & Singulate Release
142x6
BUS266REL-02B1
E68...-xyC
E68-SVAREL2-C2
E68...-xyP
E68-SVAREL2-P2
