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THERMAL MANAGEMENT SOLUTIONS
EN-TraceTekTTNRM-IM-H57474 01/13
WWW.THERMAL.PENTAIR.COM
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Tel: +1.800.545.6258
Fax: +1.800.527.5703
Tel: +1.650.216.1526
Fax: +1.650.474.7215
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Fax: +55.11.2588.1410
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right to change specifications without prior notice.
ON
TxD
IO/RN
IO/ER
RxD
CRC
Address x 1
x 10
750-315
Power on
Communications
E. Update the TTDM-128 Network
TT-NRM units are controlled by a central TTDM-128. The
Update Network Function in the TTDM-128 software must
be triggered in order for the TTDM-128 to recognize new or
changed TT-NRM units. Until this software function is run,
the TTDM-128 will not control new TT-NRM units.
1. Energize all TT-NRMs in the network.
Confirm that the RS-485 network is complete (all TT-
NRM and TTSIM units and the TTDM-128 are connected
to the RS-485 bus), and that the power to each unit has
been turned on.
2. Use the TTDM-128 system software to update the network.
Note: When the TTDM-128 is first powered, it automati-
cally runs the “Update” function.
Run the TTDM-128 “Update Network” software function
to trigger it to recognize new TT-NRMs. The TTDM-128
User Manual (H56853) describes this software function
in detail.
3. If necessary due to problems or questions, check function
of individual modules.
• Verify that a TT-NRM is functioning by confirming that
the power LED is illuminated.
• Check all connections.
• Check that all TT-NRM modules are securely seated
on the DIN rail.
• Confirm that the TT-NRM network does not have any
duplicate RS-485 addresses.
• Individual relays can be checked using TTDM Self-test/
NRM Relay test.
