Description; Operation - Sullair RH Series User & Service Manual

E-680 CONTROLLER FOR REFRIGERANT DRYERS
4.1

DESCRIPTION

The RD product is effectively the RN product with a
E-680 Controller. Refer to Section 3.
E-680 is designed as a controller for refrigerant type
compressed air dryers. The controller has 8
temperature sensor inputs. Each channel can be
configured for type J, type K thermocouple or Pt-100
resistance thermometer. These inputs are used to
measure the temperatures at various points in the
dryer. The controller has also 8 digital (relay) outputs
and 16 digital inputs. The digital outputs are taken
through the normally open contacts of the output
relays. The contact rating of the output relays are
10A at 250 V AC Digital inputs are activated by 24V
DC or AC.
The controller has an RS-485 communication
interface that can be used for remotely monitoring
The buttons below the LCD display (
and ) are used in configuration operations.
E-680 CONTROLLER FOR REFRIGERANT DRYERS
Section 4
Figure 4-1: The Front Panel View of E-680 Controller
, , ,
channel temperatures, set points, input and output
states. Modbus RTU
communication.
The front panel of the controller contains a four line
20 character LCD display and 10 buttons that are
used in configuration and manual control operations.
The dimensions of the controller are 96 x 192 mm
(front panel) with a depth of 110 mm. The panel
cutout should be 90x185 mm. The operating voltage
of the controller is 20 - 60V AC or 20 - 85V DC.
4.2

OPERATION

The front panel view of E-680 controller is given in
Figure 4-1. The front panel of the controller contains
a four line 20 character LCD display, 9 buttons and
one alarm indicator LED.
button is used for manual control of the drain
output. While in normal operation, the drain output is
controlled according to the configured "drain on" and
protocol is used for
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