Emerson DL8000 - Communication LED Indicator Definitions; Wiring Communications

DL8000 Preset Instruction Manual
3-34 Modules Revised February-2016
Table 3-8. Communication LED Indicator Definitions
Signals Action
CTS Clear To Send indicates the modem is ready to send.
CD Data
Carrier Detect
(DCD) indicates a valid carrier signal tone detected.
DSR Data Set Ready for ring indicator communication signal.
DTR Data Terminal Ready to answer an incoming call. When off, a connection disconnects.
RTS
Ready To Send
indicates ready to transmit.
RX Receive Data (RD) signal is being received.
TX Transmit Data (TD) signal is being transmitted.
Each communications module has surge protection in accordance with
the CE certification EN 61000. Each communications module is
completely isolated from other modules and the backplane, including
power and signal isolation, with the exception of the EIA-232 (RS-232)
module. The field interface has been designed to protect the electronics
in the module. Filtering is provided on each module to reduce
communication errors.
3.3.1 Wiring Communications
Signal wiring connections to the communications are made through the
communications port removable terminal bock connectors and through
RJ-11 and RJ-45 connectors. All modules have removable terminal
blocks for convenient wiring and servicing. The terminal blocks
accommodate wire sizes between 12 and 22 AWG.
Caution
Failure to exercise proper electrostatic discharge precautions, such as
wearing a grounded wrist strap may reset the processor or damage
electronic components, resulting in interrupted operations.
To connect the wire to the removable block compression terminals:
1. Bare the end (¼ inch maximum) of the wire.
2. Insert the bared end into the clamp beneath the termination screw.
3. Tighten the screw.
Expose a minimum of bare wire to prevent short circuits. Allow some
slack when making connections to prevent strain.
Note: All modules have removable terminal blocks for convenient
wiring and servicing. Twisted-pair cable is recommended for I/O
signal wiring. The removable terminal blocks accept wire sizes
between 12 and 22 AWG.