Controller - Level 2 - SPX Hankinson HHE Series Instruction Manual

8. CONTROLLER – LEVEL 2
This section provides connection, adjustment and operational
information for the Level 2 Controller featuring the Automatic Purge
Saving System (APSS). Similar information can be found in Section 7
for the Level 1, Fixed Cycle Controller.
8.1 Reference Figures – Level 2 Controller
• Figure 8-1, Front Panel Overlay – Level 2 Controller
• Figure 8-2, Electrical Schematic – Level 2 Controller
• Figure 8-3, Point-to-Point Diagram – Level 2 Controller
• Figure 8-4, Panel Layouts – Level 2 Controller
• Figure 8-5, Enclosure Penetrations – Level 2 Controller
8.2 Connections – Level 2 Controller
See Figure 8-5, Enclosure Penetrations for the location, size and
function of the various cable and cord connectors that are provided
on the bottom of the Level 2 enclosure.
8.2.1 Connections - Input Power
8.2.1.1 VAC Input Power Connections
Single-phase, alternating current (AC) input power connections ranging
from 85-264 VAC and 47 to 63 Hz. can be made at terminals TB6-45,
-47, and -49. See reference figures for proper polarity. These terminals
are connected to accessory output terminals TB6-44, -46, and -48
respectively. Accessory output terminals can be used to direct power
at the same voltage and frequency to external devices.
CAUTION: Accessory output terminals are NOT controlled by
the power on/off switch and are always energized when power
is provided to terminals TB6-45, -47, and -49.
8.2.1.2 VDC Power Connections
• The control and display boards operate on low-voltage direct
current. The controller is provided pre-wired with an AC to 12 VDC
power supply board. For users with AC power as described in
Section 8.2.1.1, their AC input is directed to the power supply
board where it is conditioned and returned to the control board
as 12 VDC at terminals TB5-42 and -43.
• For users with direct current (DC) input power ranging from 11.5
to 28 VDC, use of the AC to DC power supply board is not needed
and their connections can be made at terminals TB5-42 and -43
by first removing the black and red leads coming from the power
supply board. See reference figures for proper polarity.
8.2.2 Connections – Common Alarm Contacts
Connections to voltage-free common alarm contacts with a minimum
5-amp rating can be made at terminals TB4-39 through -41.
• Terminal TB4-41 is the common contact connection.
• Terminal TB4-39 is the N.O. (normally open) contact
connection.
• Terminal TB4-40 is the N.C. (normally closed) contact
connection.
• The alarm relay coil is energized when power is supplied to the
controller input terminals and there are no alarms.
• The coil is de-energized when power is removed or when an
alarm condition exists.
• The common alarm is designed to activate on: a) either a dryer
fault condition or a service reminder, or b) a dryer fault condition
only. This is user selectable.
• For the common alarm to activate on either a dryer fault condition
or a service reminder, the jumper at JP6 is removed. This is the
default configuration.
• To have the common alarm activate on a dryer fault condition
only, the jumper at JP6 is installed.
• Additional information on the common alarm relay logic appears
in Table 8-1.
Power Controller
To On or
Controller? Off?
No N/A
Yes Off
Yes On
Yes On
Common Alarm Relay Logic –Level 2 Controller
8.2.3 Connections – Remote Start / Stop
Terminals TB2-17 and –18 are used to provide a 5 VDC output to a
remote switch or volt free contacts that when closed will stop the dryer
at the end of the current half cycle. The dryer will resume running
at the beginning of the new half cycle when the remote switch or
contacts are reopened. When dryer operation is in the remote stop
state, all four tower drying (green) and regenerating (amber) LEDs
flash simultaneously.
NOTE: Remote start / stop is disabled when the dryer is in the Manual
cycle operation mode. When the dryer is in the remote stop state, the
only front panel and remote selector switches (see Section 8.2.4) that
remain enabled are the power on/off switches.
8.2.4 Connections – Remote Switches
The controller door is equipped with four momentary-contact, push
button switches. Pressing on the appropriate icon printed on the
display overlay actuates these switches. The display board containing
the switches, display LEDs, text display, and the RPB (J2) terminal
strip is mounted on the inside of the enclosure door. The terminal strip
provides connection points for remotely mounted, NO (normally open),
momentary-contact push buttons that provide the same function as the
board mounted switches. The terminal – switch combinations are:
• Terminals J2-1 and –2 (Remote "SELECT" switch)
• Terminals J2-3 and –4 (Remote "ENTER" switch)
• Terminals J2-5 and –6 (Remote Power On / Off Switch)
NOTE: Care must be exercised in using this remote switch to
stop a dryer. Closing this switch will affect the same response
as a loss of power. Both purge-repressurization valves will close.
On standard pressure models 4100 & 5400 and high pressure
models 40 through 450, both inlet-switching valves will open. A
tower that is actively purging when the power on/off button is
actuated will be subjected to a rapid repressurization that can
lead to fluidization and subsequent abrasion of the desiccant bed.
Ideally, dryers should only be powered off during those portions of
— 31 —
Alarm
Alarm or Alarm
N.O.
Service Relay
Contact
Reminder Coil
(TB4-39)
N/A De-Energized Open
N/A Energized Closed
No Energized Closed
Yes De-Energized Open
Table 8-1
Alarm
N.C.
Contact
(TB4-40)
Closed
Open
Open
Closed