South Bend, Indiana USA
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networketi.com
PT-SINGLE
INSTALLATION MANUAL | PART NO.
25166
REV
D
6
PANEL LOCKOUT
To prevent unauthorized changes of control settings, the
second DIP switch can be set to the on position to Lock
the settings. With Lock enabled, the control panel will
allow viewing but not changing any of the settings; only
the °C or °F option can be changed. See Figure 6.
Note:
The GPT reads the Lock DIP switch position when
the Settings screen is entered. If the switch is changed,
you need to re-enter the Settings screen.
EXTERNAL ALARM
Alarm Connections
An alarm or power–off condition can be communicated
by either opening or closing a relay contact. It is important
to make the proper alarm relay connections to achieve
the desired result. The middle terminal labeled COM
(Common) is used in both wiring configurations. Connect
one alarm relay lead to the COM terminal.
If the system needs a contact to close to signal an alarm or
power–off condition, connect the other alarm relay lead
to the NC (Normally Closed) terminal. See Figure 7.
If the system needs a contact to open to signal an alarm
or power–off condition, then connect the other alarm
relay lead to the NO (Normally Open) terminal.
If the unit has power, and there are no alarm conditions
then the NO and COM terminals will be connected. If the
unit loses power or an alarm condition occurs then the
NC and COM terminals will be connected.
Note:
The “Normally” condition of the relay is the alarm
condition for the unit.
OPERATION
The
PT-SINGLE
can maintain temperatures from a
setpoint
ranging from −99.9 °F to 999.9 °F (−73.3 °C to
537.7 °C).
The usable temperature range is sensor
dependent. The
heater will energize when the
temperature drops below the designated setpoint. The
heater will de-energize when
the temperature meets the
designated High Temperature.
The
PT-SINGLE
features ETI’s patented self–testing
GFEP, which switches the system off when it detects
excessive ground current leakage. The GFEP eliminates
the extra expenses associated with having to provide an
external GFEP.
Alarms
Critical Alarms are Latching alarms and include Ground
Fault, High Current, Stuck Relay, Internal Circuit, and
FIGURE 6. Panel lockout DIP switch configuration
Wiring to normally closed
alarm contact
FIGURE 7. External alarm connection
Setting for
Panel Lockout ON
(default is OFF)
