Controller - Standard - Gardner Denver DGH Series Instruction Manual

7. CONTROLLER – STANDARD
This section provides connection, adjustment and operational
information for the Standard – Fixed Cycle Controller. Similar
information for the Energy Savings Controller featuring the APSS,
Automatic Purge Saving System, can be found in Section 8.
7.1 Reference Figures – Standard Controller
• Figure 7-1, Front Panel Overlay – Standard Controllers
• Figure 7-2, Electrical Schematic – Standard Controllers
• Figure 7-3, Point-to-Point Diagram – Standard Controllers
• Figure 7-4, Panel Layouts – Standard Controllers
• Figure 7-5, Enclosure Penetrations – Standard Controllers
7.2 Connections – Standard Controllers
See Figure 7-5, Enclosure Penetrations for the location, size and
function of the various cable and cord connectors that are provided
on the bottom of the Standard Controller enclosure.
7.2.1 Connections - Input Power
7.2.1.1 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 TB5-20,
-22, and -24. See reference figures for proper polarity. These terminals
are connected to accessory output terminals TB5-21, -23, and -25
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 TB -20, -22, and -24.
7.2.1.2 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 7.2.1.1, 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 TB4-18 and -19.
• 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 TB4-18 and -19
by first removing the black and red leads coming from the power
supply board. See reference figures for proper polarity.
7.2.2 Connections – Common Alarm Contacts
Connections to voltage-free common alarm contacts with a maximum
5-amp rating can be made at terminals TB2-7 through -9.
• Terminal TB2-9 is the common contact connection.
• Terminal TB2-7 is the N.O. (normally open) contact connection.
• Terminal TB2-8 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 J2 is removed. This is the
default configuration.
• To have the common alarm activate ona dryer fault condition only,
the jumper at J2 is installed.
• Additional information on the common alarm relay logic appears
in Table 7-1.
Power Controller
To On or
Controller Off?
No N/A
Yes Off
Yes On
Yes On
Common Alarm Relay Logic –Standard Controller
7.2.3 Connections – Remote Start / Stop
Terminals TB1-1 and -2 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 7.2.4) that
remain enabled are the power on/off switches.
7.2.4 Connections – Remote Switches
The controller door is equipped with four momentary-contact, push
button switches. Pressing the appropriate icon printed on the display
overlay actuates these switches. The display board containing the
switches, display LEDs and the 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 switch to select ISO dew point
class or manual cycle / test mode)
• Terminals J2-3 and -4 (remote switch to select % energy savings
mode)
• 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
— 21 —
Alarm
Alarm or Alarm
N.O.
Service Relay
Contact
Reminder Coil
(TB2-7)
N/A De-Energized Open
N/A Energized Closed
No Energized Closed
Yes De-Energized Open
Table 7-1
Alarm
N.C.
Contact
(TB2-8)
Closed
Open
Open
Closed