nVent.com | 3
LEADER CABLE CONNECTIONS FOR SENSOR
The TTA-SIM can be used with any of the nVent RAYCHEM
TraceTek family of sensing cables including TT1000, TT3000,
TT5000 and TT5001, as well as float switches and point
probes. Connect the TraceTek leader cable to the lever operated
sensor terminals on the relay unit as shown in Figure 4 and the
following table.
Note
: To connect a wire to a lever operated terminal, use a small
flat-blade screwdriver to press down on the lever. Insert the wire
(stripped approx. 6 mm [0.25”]) into the opening in the terminal
block, then release the lever.
Terminal
Color
Item
R
Red
Red / Green Sensor Cable Loop
G
Green
Y
Yellow
Yellow / Black Sensor Cable Loop
B
Black
Figure 4. Sensor Connections
CONNECTIONS FOR ALARM RELAY (OPTIONAL)
Connections to the TTA-SIM relay are made using the lever
operated cage-clamp terminals located on the relay unit (see
Figure 5). The software programmable TTA-SIM relay contacts
may be used for local or remote annunciation, to control a
valve or other device, or for connection to a control automation
system contact input. The relay can be programmed to alarm on
leak only or on either leak or sensor fault. The relay can also be
programmed to be ON (coil energized) or OFF (coil de-energized)
to signal an alarm (see table below). The relay can be
programmed using a TTDM-128 (see TTDM-128 User Manual).
Programmed
Alarm State
Alarm Condition
Status at Terminals
10-11
11-12
On (default)
No alarms
closed
open
Alarm
open
closed
Loss of power
closed
open
Off
No alarms
open
closed
Alarm
closed
open
Loss of power
closed
open
Figure 5. Alarm Relay Connections
CONNECTIONS FOR TELEMETRY (OPTIONAL)
Telemetry connections to the TTA-SIM are made using the screw
terminals on the TTSIM unit itself (see Figure 6). Cut back the
wires to fit and strip to expose approximately 6 mm (1/4 in) of
conductor and make the connections. Be sure to connect the
shield as indicated.
Terminal
Color
Item
13
—
Shield Drain Wire
Shielded twisted
pair from Host or
previous TraceTek
module
14
Black
RS-485 (–)
15
Red
RS-485 (+)
16
—
Shield Drain Wire
Shielded twisted
pair to next
TraceTek module
17
Black
RS-485 (–)
18
Red
RS-485 (+)
Figure 6. Telemetry Connections
Sensor connections
(R G Y B)
Normally Closed
Normally Open
Common
Telemetry
connections
