Table of Contents
Advertisement
LED
ACT (red)
Indicates whether the
MA 21 is in transparent
mode
DEC (green)
NET (green)
DTR (green)
Data transmission
3.6
Service mode
Service interface
The MA 21 offers the service interface for commissioning the connector unit. It can be
accessed once the MA 21 housing cover has been removed and features a 9-pin, Sub-D
connector (male).
Connection
You can use this to connect a PC or terminal to the MA 21 via the serial RS 232/V.24 inter-
face in order to configure the device. The connection is made using a crossed RS 232
connection cable that establishes the RxD, TxD and GND connections. A hardware hand-
shake via RTS, CTS is not supported at the service interface.
RS 232 connection cable
Figure 3.7: Connecting the service interface to a PC/terminal
Leuze electronic
State
light off
continuous light
Not featured on the MA 21
Not featured on the MA 21
PC/terminal
COM interface
5 GND
3 TxD
2 RxD
Specifications of the MA 21
Meaning
• Online commands are interpreted
and executed
• Online commands are not inter-
preted
Indicates data transmission to the
host interface of the MA 21
MA 21
MA 21
Service interface
GND 5
TxD 3
RxD 2
15
Advertisement
Table of Contents
