Protocol Converter
Quick Start Guide
hank you for purchasing the FDS-PC Protocol Converter. This guide
describes how to install the Protocol Converter.
If you need further assistance, contact RLE Technologies on our
website at http://www.rletech.com/ (go to the Support Link) or by calling
970.484.6510, Option 2.
1Pre-Installation
Information You Need
Consult with your IT administrator to determine the following network settings for
the Protocol Converter:
IP address ___________________________________
Subnet mask ___________________________________
Default gateway___________________________________
Supplies You Need
18 AWG shielded, twisted-pair stranded copper wire for EIA-485 Modbus
RTU communication. RLE recommends no more than 2,000 feet (609.6m) of
wire at this specification. If longer runs are needed, contact RLE Technologies
for application guidance.
Straight-through CAT5 cable for network connectivity.
Straight-through, nine-pin serial cable (temporary connection; only as
necessary).
18 – 22 AWG ground wire.
Electrostatic discharge (ESD) protection.
2Mounting the Protocol Converter
The Protocol Converter comes in a 19-inch (.48m), rack-mount enclosure. Rack-
mount brackets and hardware are included.
1Attach the brackets to the sides of the Protocol Converter using the
hardware provided.
2Install the Protocol Converter in the rack.
3Use the proper anchoring method to mount the unit securely.
3Wiring the Protocol Converter
Connect the wiring for the Protocol Converter as described in the following
subsections.
IMPORTANT Before connecting any wiring, be sure to take precautions to protect
the Protocol Converter from electrostatic discharge.
Power Supply and Ground Connections
1Connect power to the Protocol Converter in one of two ways:
aPlug the wall adapter (provided) into the power jack on the Protocol
Converter and into a UPS outlet.
bConnect a dedicated 24VDC power supply to the + and - terminals to the
left of the power jack.
2Connect an 18 – 22 AWG ground wire (not included) to the Protocol
Converter’s ground lug and to a suitable earth ground.
Note: RLE Technologies recommends powering the Protocol Converter
from a UPS (uninterruptible power supply) so the Protocol Converter
can send alarm notifications during a power outage.
RJ45 Ethernet Connection
The Protocol Converter has an internal 10/100BaseT Ethernet port used to
configure the Protocol Converter. The Ethernet port supports Web browser
access, BACnet, Modbus, SNMP, and SMTP (email).
Direct connection between the Protocol Converter and a computer or laptop using
the crossover cable (provided):
Typical Protocol Converter connection on a subnet using a hub or switch and
straight-through CAT5 cables:
EIA-232 COM Connection
The EIA-232 port can be connected to a PC for IP configuration, firmware
downloads, and troubleshooting. The EIA-232 is typically only used as a
temporary connection.
Connect the straight through, 9-pin, serial cable:
Modbus EIA-485 Connections
The Protocol Converter can function as a Modbus Slave or Modbus Master over
an EIA-485 hardware connection. The Dual Port Protocol Converter has two
2-wire and one 2- or 4-wire EIA-485 ports for extended Modbus communication
over multiple trunk lines.
