GE MDS RCL220, Manual

Page: 16 / 79

RCL220_manual_v3-draft.doc
05-XXXXA01 Version 3 Draft Page 16 of 79 9/20/2016
New DB-
25 Pin
Signal
Previous PRM
Connector Previous
PRM Pin Direction WRT MDS
Equipment
9 COM3_CTS N/A N/A Input
10 COM3_RTS N/A N/A Output
11 COM3_DTR N/A N/A Output
12 COM3_RXD N/A N/A Input
13 GND N/A N/A Input/Output
14 ETH_TX_H N/A N/A Output
15 ETH_TX_L N/A N/A Output
16 ETH_RX_H N/A N/A Input
17 ETH_RX_L N/A N/A Input
18 EXT_KEY I/O 1 Output
19 EXT_DET I/O 2 Input
20 COM2_DTR J3 (COM2) 3 Input
21 ALARM_OUT I/O 3 Output
22 GPS_PPS_L I/O 5
Input
23 GPS_PPS_H I/O 6
Input
24 TXD* J5 (COM1) 5
Input
25 RXD** J5 (COM1) 4
Output
* TXD is called COM1_RXD on the AP. It truly is an input to the MDS unit.
** RXD is called COM1_TXD on the AP. It truly is an output from the MDS unit.
The DB-25 connector is female, and the orientation of the connector as looking into the front panel of
the unit is as shown below.
12 11 10 9 8 7 6 5 4 3 2 1
24 23 22 21 20 19 18 17 16 15 14
13
25
2.3.2 RF Connector
The RF connector is TNC. Lightning suppression such as a Polyphaser IS-B50 series protector should
be employed between the antenna and the radio. The body of the protector should be well grounded
to earth ground. In addition, the shield of the feedline should be connected to earth ground before
entry into any inside enclosure.
2.3.3 Power Connector Pinout
The Packaged Radio Module provides a Phoenix 17 76 69 2 connector for DC power in. A surge
protection device such as a Polyphaser IS-17VDC-30A-NG capable of limiting the voltage input to the
radio to less than 30 Volts should be employed as near to the radio as possible.
Pin Signal Name Direction with respect to MDS Equipment Description
1 (L) PWR Input 6 to 30 VDC input, 800
mA at 13.8 VDC
2 I GROUND Input Power return.