nvent RAYCHEM T2000 User Manual

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3.4.20 LOAD SHEDDING GCC CONTACT INPUTS
Purpose: This allows the user to specify, which of the four GCC contact inputs will cause this
control module to be put into load shedding mode. Each control module may be programmed
to respond to any combination of the four GCC contact inputs. For details on the load shedding
command issued by a GCC see Section 5.3 of this manual.
Setting: ENABLE/YES or DISABLE/NO
Procedure: Select ENABLE/YES to enable or DISABLE/NO to disable, the load shedding control
associated with a particular GCC contact input.
IMPORTANT:
• This feature is only available if the load shedding control mode is enabled.
• If a control module is programmed to be associated with more than one of the four
GCC contact inputs, then all of the enabled GCC contact inputs must be actuated (in the
load shedding command issued by the GCC) before the control module will go into load
sheddingmode.
3.4.21 ALARM OUTPUT NORMAL STATE
Purpose: This allows the selection of the normal state of the alarm output signal from the
control module. This alarm output signal is used to control the alarm relay on the AC 2000
alarm/communications interface card when the control module detects an alarm condition.
The normal state is assumed to be when the control module is powered and no alarms exist.
Setting: N.O. (Normally Open) or N.C. (Normally Closed)
Procedure: The ALARM OUTPUT NORMAL STATE for the CM 2000 or the CM 2000+ control
modules must always be set for Normally Open (N.O.) operation. This insures that the ALARM
LED on the front panel of the AC 2000 Alarm/communications Interface or AI 2000+ Alarm
Interface card will only be illuminated when an alarm condition exists in a control module.
IMPORTANT:
• The coil of the alarm output relay of the AC 2000 alarm/communications interface card
will be energized under “normal” conditions (power on with no control module alarms).
Therefore, loss of power or an active alarm on any connected control module will
de-energize the alarm output relay. The AC 2000’s Normally Closed (N.C.) contacts will open
and its Normally Open (N.O.) contacts will close.
• The relay drive output(s) of the AC 2000 Alarm/communications Interface or AI 2000+ Alarm
Interface card will be energized under “normal” conditions (power on with no control module
alarms). Therefore, loss of power or an active alarm on any connected control module will
de-energize an external output relay.
3.4.22 FLASH ALARM OUTPUT SETTING
Purpose: Programs the alarm output signal from a control module for flashing or steady
output in case of an alarm condition.
Setting: YES (Flash) or NO (Steady)
Procedure: The FLASH ALARM OUTPUT SETTING for the CM 2000 and the CM 2000+ control
modules, must always be set to NO (Steady). If set to YES (Flash) there is the possibility that
the ALARM LED and the dry contact alarm output relay on the AC 2000 alarm/communications
interface card may not activate if more than one control module has an active alarm.

nvent RAYCHEM T2000 Specifications

General

Brand	nvent
Model	RAYCHEM T2000
Category	Controller
Language	English