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4 rfta remote interface connector (j4) – Comtech EF Data KST-2000A/B User Manual

Page 60

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Ku-Band Satellite Transceiver

Revision 9

Operation

MN/KST2000AB.IOM

3–12

3.4.4

RFTA Remote Interface Connector (J4)

The RFTA remote interface connector (J4) is a 26-pin, MS style female connector. It
routes serial interface signals, KP-10 power, and uplink and downlink fault information
from Unit A J2 remote to RJU-2000 J6, interface M&C connector. Refer to
Table 3-4 for connector pinout.

Table 3-4. RFTA Remote Interface Connector J4 Pinout Description

Pin

Signal

Description

A

–TX/RX –RX –EIA-485 TX/RX or –EIA-422 RX

B

–TX/RX –TX

–EIA-485 TX/RX or –EIA-422 TX

C

+TX/RX +RX +EIA-485 TX/RX or +EIA-422 RX

D

+TX/RX +TX +EIA-485 TX/RX or +EIA-422 TX

E N/C

No

connection

F N/C

No

connection

G N/C

No

connection

H N/C

No

connection

J GND

Ground

K N/C

No

connection

L GND

Ground

M

RESET

Reset, (momentary low resets system)

N GND

Ground

P N/C

No

connection

R GND

Ground

S

+12V

+12VDC (KP-10 power supply output)

T

2/4 wire

EIA-485 (open)/EIA-422 (ground) opera-
tion

U

UL_FLT_NC

Uplink fault relay, closed = fault

V UL_FLT_CO

M

Uplink fault relay, common

W UL_FLT_NO

Uplink fault relay open = fault

X

DL_FLT_NC

Downlink fault relay, closed = fault

Y DL_FLT_CO

M

Downlink fault relay common

Z

DL_FLT_NO

Downlink fault relay, open = fault

a N/C

No

connection

b N/C

No

connection

c N/C

No

connection