SFC6400A/SFC1450A Synthesized Frequency Upconverter Rear Panel Interfaces
TM106 – Rev. 1.1 5-9
5.13.10 (J19)
J19 is a D Sub 25 Pin Female Connector that is a combination of the RS-484 and B/U Switch
Interfaces. This connector connects each converter in a daisy chain configuration with the backup
master converter.
Table 5-7. J19 – D-Sub 25-Pin Female Connector
Pin No. Signal I/O Description
1 +15 V_SW --- +15 VDC Power Bus
2 +15 V_SW --- +15 VDC Power Bus
3 TX_485-A_SW Out Inverted RS-485 Transmit
4 RX_485-A_SW In Inverted RS-485 Receive
5 I2C_SDA_SW I/O I2C Data
6 ID_IN_SW0 In Converter Position ID Bit 0
7 ID_IN_SW2 In Converter Position ID Bit 2
8 FAULT_SW1 Out Switch Fault Indicator – Prime 1
9 FAULT_SW3 Out Switch Fault Indicator – Prime 3
10 FAULT_SW5 Out Switch Fault Indicator – Prime 5
11 FAULT_SW7 Out Switch Fault Indicator – Prime 7
12 GND --- Ground
13 GND --- Ground
14 +15 V_SW --- +15 VDC Power Bus
15 N/C --- No Connection
16 TX_485-B_SW Out RS-485 Transmit
17 RX_485-B_SW In RS-485 Receive
18 I2C_SCL_SW Out I2C Clock
19 ID_IN_SW1 Out Converter Position ID Bit 1
20 ID_IN_SW3 Out Converter Position ID Bit 3
21 FAULT_SW2 Out Switch Fault Indicator – Prime 2
22 FAULT_SW4 Out Switch Fault Indicator – Prime 4
23 FAULT_SW6 Out Switch Fault Indicator – Prime 6
24 FAULT_SW8 Out Switch Fault Indicator – Prime 8
25 GND --- Ground