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TT-NRM System Layout
• The TTDM-128 controls up to 127 circuits of leak
detection. TT-NRM units switch external alarm or control
devices. NRMs are connected to the TTDM-128 unit via a
single RS-485 network.
TT-NRM Assembly
1
Network processor (marked 750-315)
2
2-channel relay output module(s) (marked 750-517) [up
to 16 total m odules allowed per processor]
3
End termination module (marked 750-600)
4
DIN 35 rail
5
Address switches
6
RS-485 ribbon cable
7
RS-485 network connection module
8
24 Vdc power supply
9
Ground terminal
bk
End stops
THERMAL MANAGEMENT SOLUTIONS
TTDM 128
TT-NRM
–
+
N
L
EN-TraceTekTTNRM-IM-H57474 01/13
ON
TxD
RxD
CRC
24V 0V
IO/RN
IO/ER
Address x 1
x 10
750-517 750-517 750-517
750-517 750-600
2 / 8
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