THERMAL MANAGEMENT SOLUTIONS
EN-TraceTekTTDM128-IM-H57341 03/13
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connect the alarm relays.
The TTDM-128 has three relays, for service
ck
, leak
bt
, and fault
bs
. Each relay provides two Form-C relay contacts, and normally
open and normally closed contacts are both provided. The relays
are
de-energized to indicate an alarm
condition. The illustration
shows the relay status in the alarm (de-energized) state.
The illustrations that follow show how relays can be jumpered
together to allow remote monitoring of the TTDM-128 status with
only a single pair of wires. The TTDM-128
de-energizes
its relays
to signal an alarm condition. Therefore, loss of power, as well as
any other type of alarm, would signal the remote alarm.
Note:
The relay plugs can accept wires 10 AWG (4.7 sq. mm) or
smaller. We recommend 18 AWG (1.0 sq. mm) wires. Cable should
have a temperature rating of 65°C.
Note:
Maximum load for relays is 5 A.
LEAK RELAY
SERVICE RELAY
FAULT RELAY
Monitoring circuit
(alarm on open circuit)
Relays wired
in series
Alarm on open circuit
Monitoring circuit
(alarm on closed circuit)
Relays wired
in parallel
Alarm on closed circuit
Test after supplying power.
• Close and latch the enclosure door.
• Supply power to the unit. When power is supplied, the green LED
illuminates, and the unit goes through a series of self-tests. Af-
ter the start-up sequence is complete, the module should report
a fault alarm (this is normal; there is no sensing cable attached).
Press the red Silence key to silence the audible alarm. Verify that
the display appears similar to the one shown here (the time and
date may be different):
If anything other than the above occurs, check all connections. If
unit still does not appear to operate properly, contact a TraceTek
representative for assistance.
• Press the Test button. The module conducts a number of self-tests.
• If the tests are successfully completed, record this on the instal
-
lation record.
• Turn off the power supply to the unit.
Test with TTdM-128 test plug.
• To conduct a more complete test, use the TraceTek TTDM-CTP test
plug (packed in a plastic bag in the TTDM packaging). Insert the plug
into the sensing cable socket
cn
on the sensor interface board
9
.
• Close and latch the enclosure door.
• Supply power to the unit. When power is supplied, the unit will again
go through a series of self-tests. If the test plug is in the sensing cable
socket, after the module completes the start-up sequence it should
sound and display a leak alarm. Press the Silence key to silence the
audible alarm. The red Leak LED and green Monitoring LED should
both be illuminated, and the screen display should appear similar to
the one shown here (depending on the setting).
• If anything other than the above occurs, check all connections. If unit
still does not appear to operate properly, contact a TraceTek represen-
tative for assistance.
• If the test is successfully completed, record this on the installation
record.
• Turn off the power supply to the unit.
• Remove the TTDM-CTP test plug and store it in a secure place for
future use.
• If not immediately connecting the sensing cable, or TraceTek net
-
work, close and latch the enclosure.
Depending on the units selected, the leak
distance should be within the values below:
feet:
527 to 548 ft
meters: 160 to 168
zones: 11
Testing the Module
