User's Manual

Page 3–16
18 September 2007
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-128 High-speed Data Terminal
A “remote reset switch” for HSD transceivers can also be installed and located
with the Remote Status Panel.
Figure 3–4 illustrates a typical wiring diagram for
the remote reset circuit.
Note: Cooperative and Combined Mode installations and HSD-X transceivers
DO NOT support the use of the reset function.
1. HSD Remote Reset Switch Circuit Requirements – Stand-Alone
HSD transceivers support the installation of a Remote Reset Switch circuit
as shown in
Figure 3–4.
The HSD Remote Reset circuit requires less than 100 ohms between TP1K
(RESET) and MP1F(COM) to be asserted and greater than 10 kilohms to be
de-asserted (include all cable and switch contact resistance).
2. HSD Remote LED Driver Circuit Requirements – Stand-Alone
The circuit requirements for the HSD Remote Status LED drivers are shown
in
Figure 3–5. Each LED driver circuit has a 200-ohm current limit resistor.
The maximum cable resistance (including the forward and return paths) must
not exceed 100 ohms to provide adequate current to the 5 volt LEDs (i.e. 10
mA minimum) at the remote status panel.
It is recommended that the installer use shielded cables to provide a level of
noise immunity.
Figure 3–4. HSD Remote Reset Circuit – Stand-Alone