Form 6 triple-single microprocessor-based rack mount recloser control
30 INSTALLATION AND OPERATION INSTRUCTIONS   MN280084EN   July 2018
Communication board accessories
The Form 6 control is equipped with a Communication 
Board Accessory (expansion bay) offering versatile 
support for modern communication media. Six distinct 
communication options (Figure23) are available, providing 
two-way, real time digital communications with a remote 
terminal unit (RTU), wireless, telephone modem, Ethernet 
network, or other communication devices. The following 
options are available:
 
No auxiliary communication card installed (standard)
 
RS485 (isolated) Serial communication card
 
Fiber-optic-based Serial Communication Card (ST)
 
10/100 Base-T dual Ethernet communication 
card(2*RJ-45)
 
100 Base-FX dual Ethernet communication card 
(2*MT-RJ)
 
10/100 Base-T, 100 Base-FX Ethernet communication 
card(RJ-45 + MT-RJ)
The expansion bay based Communication Board 
Accessory concept offers high versatility with respect to 
communication medium and protocol support. Additional 
accessories are being continuously developed. Contact your 
Eaton representative for the latest information regarding 
particular media and communication protocol support.
RS485 serial communication card
The RS485 serial communication card accessory provides 
means for establishing asynchronous link-based digital 
communications with the Form 6 control. The Galvanic 
isolated (1000V DC) RS485 port uses a single shielded 
twisted pair connection and can support 32 devices in 
multi-drop configuration. Communication speed is controlled 
through software and can be set at: 1200, 2400, 4800, 
9600, 19.2 k, 38.4 k, 57.6 k, and 115 kBPS.
Digital communications must be programmed through the 
Communications Workbench to ensure proper operation of 
the RS485 communication card accessory. Refer to Service 
Information S280-70-9 (ProView 4.X.X) or S280-70-23 
(ProView 5.X.X) Form 6-TS Control Programming Guide for 
additional protocol support information.
Fiber-optic based serial communication card
The Fiber-Optic based Serial Communication Card offers 
means of establishing asynchronous (RS-232 like) digital 
communications through multi-mode fiber media. The use of 
the fiber-optic based serial communication card accessory 
can enhance communication reliability, and provides 
excellent electrical isolation thus protecting transmitted data 
from extraneous electrical interference. 
An optional fiber-optic-to-RS-232D converter with DB-9 
connector (Catalog Number KME6-1875-1) is available for 
interfacing between an optical signal and a hard-wired 
RS-232 signal, when required. This converter is compatible 
with loop (ring) and point-to-point (star) configurations.
A pair of industry standard ST type fiber-optic connectors 
are mounted on the back of the board enabling customer 
connection to a digital communication system using fiber-
optic cables (customer-supplied).
The fiber-optic link has separate receive (RX) and transmit 
(TX) ports operating at 820 nm. Typical transmission 
distance is 2000 m with 62.5/125µm multi-mode fiber. 
Consult your Eaton representative for  availability of long 
haul solutions. Link communication speed is controlled 
through software and can be set at: 1200, 2400, 4800, 
9600, 19.2 k, and 38.4 k. Modbus can also be set at 57.6 k.
The fiber-optic accessory must be programmed through the 
Communications Workbench for the appropriate protocol. 
Refer to Service Information S280-70-9 (ProView 4.X.X) or 
S280-70-23 (ProView 5.X.X) Form 6-TS Control Programming 
Guide for additional information.
The fiber-optic based serial accessory includes TX and 
RX indicating LEDs for verifying communications along 
with an echo / non-echo switch for supporting ring / star 
fibertopologies.
When operated in a ring configuration, the toggle switch 
must be set in the ECHO position. In this mode, the fiber-
optic card will repeat (pass through) all messages received 
on the RX fiber, and will respond to the Master station by 
first echoing the incoming command and then sending the 
response. This arrangement is best suited for creation of low 
cost multi device fiber loops. For reliable communications, 
the fiber loop system requires that all devices in the loop 
remain powered at all times, thus enabling unobstructed 
flow of information throughout the loop.
A more resilient system can be designed by using the 
fiber-optic ports in a point-to-point or multiple point-to-point 
(star) configuration. For this mode, the toggle switch must 
be set in the NON-ECHO mode. The Form 6 control will 
respond to the Master station by sending a response only 
(total separation of Receive and Transmit fibers). Additional 
hardware (fiber-optic star coupler) is required to support the 
multiple point-to-point device configurations.
Ethernet communication cards
The Ethernet communication card accessory brings the 
Ethernet network connectivity to the Form 6 recloser control 
platform. It is highly flexible, offering simultaneous support 
for multiple sessions, device management (ProView over 
TCP/IP) and SCADA communications (DNP3 over TCP/IP).
By natively supporting a set of widely accepted industry 
standards (TCP/IP, UDP/IP, OSI) the Ethernet communication 
accessory ensures seamless interoperability with other 
network devices.