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industrial heat tracing solutions
EN-RaychemNGC30UIT2Programming-AR-H5818602/16
RTD input is available and the relay output for this Circuit goes to the failsafe mode established in
the Setup|Circuit window.
Fig. 3.11 Setup | RTDs window- Four RTDs are assigned to the circuit
Each RTD can be set to operate in two modes: Control or Monitoring. If an SES is used as a
Continuity sensor, a third option for Continuity is also selectable. If an RTD is set to Control, the
output of the Circuit will be based on this RTD in conjunction with any other Control RTDs in Auto
On/Off mode. These RTDs will also trigger temperature alarms and cutouts. However, if an RTD is
set to Monitoring, its temperatures will not be used to control the circuit's relay output. RTDs set
to Monitor will trigger temperature alarms but not high temp cutout. A RTD mode set to Continuity
will only report that power has reached the SES module.
The table below indicates the RTD Mode (RTD application) options for each RTD device.
Table 3.2 RTD Mode Options
Connection Type RS-485 Device RTD Device RTD Modes
Control Monitor Continuity
Hard-wired, local CRM/CRMS the
same circuit
Direct X -- --
Hard-wired, not
local
CRM/CRMS
another circuit
Direct X X --
Hard-wired, local NGC-20 Direct X -- --
Serial RMM2 Direct X X --
Serial PLI-SES/SPC via SES-RTD X X --
Serial PLI-SES/SPC No RTD -- -- X
Serial PLI-SES/SPC via SES-SPC X X --
Serial PLI-TT via 700-TT X X --
IMPORTANT: The SES-CONT device does not have any RTDs, thus can not control or monitor the
temperature. Therefore, the only RTD Mode that can be selected is Continuity. In Continuity Mode,
the integrity of the heat-tracing system is monitored.
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