Table of Contents
Advertisement
LNL-500 Intelligent System Controller
To configure as two 4-wire RS-485 ports, follow the 4-wire diagram:
Port 2/3:
(Transmit)
TR2+, TR2-
Notes:
The ISC can be located anywhere along the RS-485 line.
Install an RS-485 terminator for each end-of-line device.
9.1.4
Power
The ISC accepts either a 12 VDC or 12 VAC ± 15% power source for its power input. The power source
should be located as close to the ISC as possible.
Wire the power input with 18 AWG (minimum) twisted pair cable.
For AC power sources, the following lines are required: AC Line (L), AC Neutral (N). These lines must not
be interchanged. A 400 mA RMS current is required for AC power supplies.
For DC power sources, isolated and non-switching, regulated DC power is required. A 250 mA current is
required for DC power supplies.
Note:
If using a 12 VDC power source, be sure to observe polarity.
9.1.5
Other
Remove the factory-installed plastic safety strip from the memory backup battery. This plastic strip prevents
the battery from being effectively seated. The battery will not function properly until the plastic strip is
removed. When the battery is enabled, all volatile RAM is protected.
Note:
You must first remove the plastic strip to enable the battery.
68 —
revision 7
(Receive)
GRD
TR3+, TR3-
Power Source Wiring
12 VAC
... OR ...
+
12 VDC
–
ACDC
AC
GND
ACDC
AC
GND
Advertisement
Table of Contents
