SmartPad LCD
Page:
17
© 2003 Xantech Corporation
•
GND:
Both GND terminals are internally connected to the same point and represent Chassis Ground of
the unit. Use either terminal to the GND of the external IR Receiver.
•
IR Input:
Connect to IR Output of an IR Receiver such as the 4such as the 490-90, 291-10, 480-80 or
other.
Use 3-Conductor 18-24AWG wire (4-Conductor if using the STATUS line). Gauge varies by wire run
distance. See
Figure 9
for wiring examples.
IR OUT
GND
+12VDC
STATUS
780-90
Plasma-Friendly
IR Receiver
Figure 9 – External IR Input Wiring
MRC C
ONTROLLER AND
E
XPANSION
P
ORT
W
IRING
:
(Figure 3 – 13/14)
These RJ45 ports are used for interfacing the SmartPad LCD unit directly to the MRC Controller and/or
Expansion MRC Keypads. The SPLCD can interface to the MRC Products in two fashions via this
connection:
1. Via IR along the dedicated IR lines of the MRC’s CAT5 connection (Pins 4 & 5) (MRC88 & MRC44)
2. Direct to the MRC88 processor via the internal RS485 communication lines
(Future Feature)
Controller:
This port is used to connect the SPLCD either directly to the MRC88 Controller or to an existing MRC88
Keypad’s Expansion port. Connect using CAT5 cable terminated at both ends with RJ45 connectors (using
the EIA/TIA 568B standard) from the MRC88 Controller/Amplifier (Zone Keypad Connection located on the
rear of the unit) into the RJ45 connector marked “Controller” on the rear of the SPLCD keypad.
Note:
When the SPLCD is the last Keypad connected in line with the MRC88, the Zone Termination
Jumper (
Figure 3 – 16)
needs to be installed.
Caution:
Power voltage for the keypad is transmitted along this cable!
Incorrect wiring on this cable can
destroy the MRC Keypad and/or the SPLCD Display!
Be sure to test cable for proper connections
before
making connections.