Hardware Reference Manual
MCU500 Mobile Locator/Control Unit
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Description
12
Revision 1.01
100-00191
11
RL2C
OM
Relay 2 - comm on contact
12
RL2N
C
Relay 2 - normally closed contact
The standard power lead provided with MCU500 has the first three pins wired.
The Molex receptacle, part number 39-01-2120, mates with the MCU500 and
additional crimp contacts can be used to wire the additional connections (use
Molex part number 39-00-0039 for 3A connections).
4.2 COM1serial port
The primary serial port (COM1) is provided on a standard DB9 male connector,
configured as a DTE with a pin-out which is compatible with an IBM PC/AT serial
port:
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Description
1
DCD
Data Carrier Detect
(inpu t)
2
RXD
Re ceive Data (inpu t)
3
TXD
Trans m it Data (outp ut)
4
DTR
Data Terminal Ready
(outp ut)
5
GND
Ground
6
N/C
No connection
7
RTS
Request To Send
(outp ut)
8
CTS
Clea r To Sen d (input)
9
N/C
No connection
The primary serial port (COM1) operates at standard RS232/CCITT V.24 voltage
levels and is intended for the connection of a mobile data terminal, in vehicle PC
or similar. This primary serial port is also used for programming the unit. A 9-way
female to 9-way female (cross-over) cable is needed to connect MCU500 to
COM port on a PC. Use Thorcom cable 70-00168 or similar.