Rf Power Amplifier Connections; Receiver Connections; Remote Connections; Figure 14. Remote Primary To Secondary "Null-Modem" Connection - BMS DLC50 Installation & Operation Manual

2.6

RF Power Amplifier Connections

An external RF power amplifier requires only a PA standby/operate signal connection to the DLC50.
The PA standby/operate signal is available on pin B of the four-pin power connector. When a PVR
(power voltage relay) is used in the system, this PA standby/operate signal will be routed through the
PVR for cabling convenience. No special configuration is required for the PA.
2.7

Receiver Connections

Receiver connections to the DLC50 are generally limited to RS232 serial port COM3. Receiver
commands from the DLC50 to the receiver are output on pin 1 of the 25 pin I/O connector. Status back
from the receiver will come back to the DLC50 on pin 2 of the 25 pin I/O connector. Data ground for the
COM3 serial port is on pin 3 of the 25 pin I/O connector. The receiver type and serial port must be set
up in the receiver configuration menu. Typically the receiver port configuration will be set for COM3.
In some cases, the receiver may be daisychained to a transmitter. In this case, the receiver's
PC_command and PC_status lines will connect to the DS_Command and DS_Status lines of the
transmitter. The receiver serial configuration must be configured for COM2 in this case and the receiver
will have no direct connection to the DLC50. See Configuration section.
2.8

Remote Connections

The remote serial port is a multifunction serial port. Connection to the COM0 port is available through
both the front panel 2.5mm connector, and the rear panel 25-pin I/O connector. Only one device may
connect to the COM0 serial port, so if a rear panel connection is made, the front panel connector will
not be available for use. The rear panel connection should be used for any permanent or semi-
permanent installations. The Remote Port (COM0) must be properly configured for the desired
functionality prior to use. See Setup and Configuration section.
External Computer Control
If an external computer is used in the system to control the DLC50 and attached microwave equipment,
the connections should be made to the rear panel connections. The commands to the DLC50 will
connect to pin 8 of the 25 pin I/O connector. The status will come out of the DLC50 on pin 7 of the 25-
pin I/O connector. Data ground is on pin 9 of the 25 pin I/O connector. The Remote port must be
configured as remote client in the configuration menu. The external computer will communicate with the
DLC50 using BMS DLC50 Remote Client protocol. (Contact BMS for more information.)
Remote Control (Primary DLC50 to Secondary DLC50)
A second DLC50 (acting as a secondary remote) may be connected to COM0 of the primary DLC50.
Both the primary DLC50 and secondary DLC50 will use the Remote/Auxilary serial port COM0. The
TXD and RXD data lines must be crossed (as in a null-modem) for proper connection. The remote
serial port must be configured as "primary" on the primary DLC50 and "secondary" on the secondary
DLC50. The secondary DLC50 functions as a remote terminal to the primary DLC50. No other signal
connections should be made to the secondary DLC50. DC power must be supplied via the four-pin
power connector as described in section 2.4.

Figure 14. Remote Primary to Secondary "null-modem" connection

The document reference is online, please check the correspondence between the online documentation and the printed version.
DLC50 Control Panel Installation and Operation Manual | Doc. No. 6051439500 Rev. A
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