Operating Instructions Part 2

MDS 05-3624A01, Rev. B OEM Series™ I/O Guide 11
Do not use a 25 wire (fully pinned) cable for connection to the DATA
INTERFACE
connector. Use only the required pins for the application.
Damage may result if improper connections are made. For EIA-232
signaling, typical applications require the use of Pins 2, 3, and 7
only.
Invisible place holder
Figure 10. Data Interface Connector Pinouts
(As viewed from the front of the radio)
CAUTION
USE
ONLY REQUIRED
PINS
1
13
25
14
Table 3. DATA INTERFACE Connector Pinouts
Pin
Number
Input/
Output Pin Description
1--Protective Ground. Connects to ground (negative supply
potential) on the radio’s PC board and chassis.
2INTXD—Transmitted Data. Accepts TX data from the
connected device.
3 OUT RXD—Received Data. Outputs received data to the
connected device.
4INRTS—Request-to-Send Input. Causes CTS to go
“high.”
5 OUT CTS—Clear-to-Send Output. Behavior depends on
DEVICE command setting:
When DEVICE is set to DCE, this pin follows RTS and will
provide “buffer full” flow control.
When DEVICE is set to CTS KEY, this pin provides a
keyline output when receive data is present.
6 OUT DSR—Data Set Ready. Active when radio is powered on.
7--Signal Ground. Connects to ground (negative supply
potential) at radio’s PC board.
8 OUT DCD—Data Carrier Detect. Active when receiving
data from another OEM Series radio with the same
network address.
11 OUT Receive Audio Output. For test purposes only.