GE MDS, LLC
175 Science Parkway
Rochester, NY 14620
MDS SDA Instruction Sheet
Technical Support: +1 585 241-5510
05-6398A01, Rev. A
FAX: +1 585 242-8369
September 2014
Web: www.gemds.com
5.1
Pin Descriptions—RS-232 Mode
Pin descriptions for the COM connector in RS-232 mode are
shown in
Figure
8
and
Table
5
. Note that the unit is hardwired as
a DCE device. Refer to the Technical Manual for RS-422/485
descriptions.
(Note: RS-485 supported on COM1 only.)
1 2 3 4 5 6 7 8
Figure 8. COM Connector (RJ-45)
As viewed from outside the unit
Table 5: COM1/COM2 Pinouts—RS-232
Pin
#
Input/
Output
Pin Description
6.0
ALARM/AUDIO PINOUT
The ALARM/AUDIO Interface on the Alarm/Relay module provides
audio signaling and alarm outputs as shown below.
Invisible
place
holder
Figure 9. Alarm/Audio Connections
(As viewed from outside the radio)
7.0
TROUBLESHOOTING
If trouble occurs with the unit, verify that it meets the basic require-
ments listed below. These items should be checked prior to
starting any detailed troubleshooting or calling for assistance. All
units must have:
• Adequate and stable primary power
• Secure cable and wiring connections
• Proper configuration for the application
7.1
LEDs
The LEDs on the front of installed modules (
Table
4
) provide useful
information when troubleshooting. Power and alarm indicators are
provided on Platform Manager, Radio, and Alarm/Relay modules.
Radio Modules also have TX/RX LEDs to show wireless activity.
7.2
Redundant Units
The active radio can be identified by the corresponding LED on the
alarm/relay module as well as the active LED on the radio module.
The active unit is normally selected automatically. For trouble-
shooting, the toggle switch can be used to manually set the active
radio. Alternatively, the switch can remain in the automatic posi-
tion, and the active radio can be selected via the SD Manager UI.
7.3
Technical Assistance
Factory technical assistance is available by contacting GE MDS
during business hours (8:30 AM to 6:00 PM Eastern Time). For
telephone assistance, call (585) 241-5510, or visit our website at
www.gemds.com for additional contact options.
Refer also to the
Regulatory & Product Information Sheet
supplied
with these instructions.
1
Reserved
-- (Do not connect)
2
OUT
DCD (Data Carrier Detect)
3
Reserved
-- (Do not connect)
4
Ground
Connects to chassis ground (negative supply)
5
OUT
RXD (Received Data)—Supplies received data
to the connected device
6
IN
TXD (Transmitted Data)—Accepts TX data
from the connected device
7
OUT
CTS (Clear to Send)
8
IN
RTS (Request to Send)
