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Laptop Connection
A laptop may use the Remote/Aux serial port (COM0) as a direct connection to a connected transmitter
or receiver for maintenance functions so long as the Remote/Aux serial port (COM0) is not connected
to any other devices on the rear I/O connector. The remote serial port must be configured as "TX pass-
thru" or "RX pass-thru" to connect to the COM2 or COM3 ports respectively. The COM0 port baud rate
will be set up to match the selected transmitter or receiver port baud rate. BMS manufactures a serial
cable (Figure 15; BMS P/N 7314395013) to allow connection of a laptop serial port to the DLC50 front-
panel serial connector for pass-thru modes for transmitter and receiver maintenance.
SLEEVE
Figure 15. Front panel 2.5mm serial cable
2.9
Actuator Connections
The six-pin actuator connector is a pin-for-pin connection to the TAA-101 antenna actuator. The
actuator control and status LED indicators are active even when the DLC50 front panel power switch is
off. BMS cable P/N 7314189070 provides the connection between the DLC50 and TAA-101 actuator.
2.10
Relay Connections
Relay configuration is very flexible and customizable. The DLC50 provides four open collector
transistors for controlling relays and external switches. Each relay driver (OC1, OC2, OC3, OC4) can
be configured for manual control or automatic control based on frequency of the transmitter. An upper
and lower frequency limit can be set in the configuration for each "automatic" relay. By careful planning
of limits, multiple channel filters, sub-band filters, diplexers, and multiplexing switch arrays can be
configured. Any relay in the transmission path (whether manual or automatic) can also be configured
for hot-switch protection. If a relay is hot-switch protected, the transmitter will be forced off before
switching, then the transmitter will be returned to its previous state after switching. See relay
configuration section, or contact BMS Customer Service for more information.
An external relay can be powered by 28V or less, but the relay must be powered by the same circuit
breaker that powers the DLC50 or the PVR. Relay drivers in the DLC50 provide a switched ground to
turn on the relay. Each relay driver can sink up to 500 mA. Only relays with built-in transient
suppression diodes should be used, or transient suppression diodes can be added directly to the
terminals of the external relay.
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
Broadcast Microwave Services
12
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