4 | nVent.com
Note
: This section can be skipped if serial communication is not being used.
If the TTA-SIM will be connected to a nVent RAYCHEM TraceTek
TTDM or other host system using RS-485 serial communication,
the end of line (EOL) jumper and network address must be set.
Place the End of Line Jumper in the correct position
The End of Line Jumper on the TTSIM-1A or TTSIM-2 unit must
be set in the correct position as follows (use a small needle
nose pliers to grasp the jumper):
• On the last TTA-SIM in the network communication circuit, place
the jumper on the two pins closest to the EOL mark as shown in
Figure 7(a).
• On all other TTA-SIMs or TTSIMs in the network, place the
jumper as shown in Figure 7(b).
Figure 7. End of Line Jumper for last TTSIM (a) and all other
TTSIMs (b)
NETWORK ADDRESS ASSIGNMENT
When used in a communication network, each TTA-SIM module
must have a unique address assigned to it in the range 001 to
127. All TTA-SIM units are shipped from the factory with their
network address pre-set to a value above the range of valid
addresses, in order to prevent communication conflicts during
system startup and configuration. Each TTA-SIM must therefore
be configured to a unique address before it can communicate
with the TTDM-128 or other host.
To set the TTA-SIM network address, repeat the following
procedure for each TTA-SIM. Perform the complete procedure
one module at a time:
• Using a small needle nose pliers, place the TTA-SIM configuration
jumper in the CFG position, as shown in Figure 8(a).
• Using the TTDM-128 or host system, assign the new TTA-SIM
address (refer to the TTDM-128 User Manual or the TraceTek
System Integration Manual for instructions).
• Place the configuration jumper in the normal operating position,
as shown in Figure 7(b), or remove it completely (the jumper is not
required in normal operation).
Figure 8. CFG jumper position for configuration mode (a) and
normal operation (b)
Jumper
Jumper
(a)
(b)
Jumper
Jumper
(a)
(b)
Communications setup
