Echelon LonWorks Twisted Pair Control Module - Manual (Page 14)

6 Electrical Interface
reset pin are described in the Series 5000 Chip Data Book or the Neuron Chip
Data Book.
Service Pin
You can access the service pin (SVC~) of the FT 5000 Control Module at pin 10 of
the JP1 header. You can access the service pin (SERVICE~) of the Neuron 3150
Control Module at pin 18 of the P1 header.
This pin is used for various network installation and maintenance scenarios. The
function of this pin is described in the Series 5000 Chip Data Book or Neuron
Chip Data Book.
Figure 2 shows a typical circuit for the device service pin. Typical applications
do not require debounce conditioning of momentary push buttons attached to the
service or reset pins. The software response time associated with these inputs is
long enough to effectively provide a software debounce for switches with a contact
bounce settling time as long as 20 msec.
SVC~
VCC VCC
Control Module
VCC
SERVICE~
Smart Transceiver
or Neuron Chip
P1.18
JP1.10
VCC = +3.3V for FT 5000 Control Module
VCC = +5V for Neuron 3150 Control Module
Figure 2. Typical Service Pin Circuit