Controller – Level 1; Reference Figures – Level 1 Controller; Connections – Level 1 Controller; Connections - Input Power - Gardner Denver DGH Series Instruction Manual

6. Controller – Level 1
6. Controller – Level 1
This section provides connection, adjustment and operational
information for the Level 1 – Fixed Cycle Controller. Similar
information for the Level 2 Controller featuring the APSS,
Automatic Purge Saving System, can be found in Section 7.
6.1 Reference Figures – Level 1 Controller
•
Figure 6-1, Front Panel Overlay – Level 1 Controller
•
Figure 6.-2, Electrical Schematic – Level 1 Controller
•
Figure 6-3, Point-to-Point Diagram – Level 1 Controller
•
Figure 6-4, Panel Layouts – Level 1 Controller
•
Figure 6-5, Enclosure Penetrations – Level 1 Controller
6.2 Connections – Level 1 Controller
See Figure 6-5, Enclosure Penetrations for the location, size and
function of the various cable and cord connectors that are
provided on the bottom of the Level 1 enclosure.

6.2.1 Connections - Input Power

6.2.1.1 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.
6.2.1.2 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 6.2.1.1, 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.
6.2.2 Connections – Common Alarm Contacts
Connections to voltage-free common alarm contacts with a
minimum 5-amp rating can be made at terminals TB2-7 through
–9.
•
Terminal TB2-9 is the common contact connection.
6. Controller – Level 1
•
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.
•
Additional information on the common alarm relay logic
appears in Table 6-1.
Power Controller
To On or
Controller? Off?
No N/A
Yes Off
Yes On
Yes On
Common Alarm Relay Logic –Level 1 Controller
6.2.3 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 6.2.4) that remain enabled are the
power on/off switches.
6.2.4 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
- 16 –
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 6-1
Alarm
N.C.
Contact
(TB2-8)
Closed
Open
Open
Closed