nVent.com | 7
To CRM/S,
RMM or
NGC-20
To host
computer
Data +
Shield
Data –
5 4 3 2 1
T 9 8 7 6
Field Port
RS-485-1
Data +
Shield
Data –
Remote Port
RS-485-2
Remote Port
Field Port
Back Side of UIT
RS-485-2 RS-485-1
5 4 3 2 1
T 9 8 7 6
Communication
The NGC-UIT2-EX has two isolated RS-485 ports located at
the bottom.
Field Side Port (RS-485-1)
The RS-485 port labeled “RS-485-1” is the field side
port that is used to communicate with ModBus devices
(ie. NGC-30-CRM/S, RMM2 and NGC-20).
Host Port (RS-485-2) – Optional
The RS-485 port labeled “RS-485-2” is the Host side port that is
used to communicate with to a host computer (using RAYCHEM
Supervisory Software) or to a DCS.
Local Host Port (RS-232) – Optional
The RS-232 port can be used as local Host port that is used
to communicate with to a host computer (using RAYCHEM
Supervisory Software). If the RS-232 port is utilized, the supplied
female to female, 9-pin null modem adaptor cable must be used.
Connection
The wiring connection to both RS-485-1 and RS-485-2 are the same.
Install the two 9 pin D-SUB to 10 pin terminal block on a DIN rail
inside the panel enclosure. (Note: These should be placed were the
Serial cable from the bottom of the NGC-UIT2-EX mounted on the
panel door can be easily accessible).
Connect one end of the Serial communication cables to the ports
labeled RS-485-1 and RS-485-2 on the touch screen and the other
ends to the 9 pin D-SUB to 10 pin terminal block.
(Note: The lengths of Serial communication cables are based upon
were the touch screen is located and the 9 pin D-SUB to 10 pin ter-
minal block. You should locate these parts first, measure, and then
purchase your Serial communication cables).
Using a shielded, twisted pair cable (Belden CDT cable 8761 or
equivalent, maximum length is 1219 meters (4000 feet), connect
to terminals 3 (–) and 4 (+) on the 9 pin D-SUB to 10 pin terminal
blocks taking note of the polarity.
The NGC-UIT2-EX contains no user-serviceable parts. Contact your nVent representative for service and an authorization number if required.
The touch screen area of the NGC-UIT2-EX may be cleaned with a damp cloth. Typical window cleaning agents may be applied to aid in the removal
of dirt, dust and grease. Do not use abrasive cleaners.
Servicing
Cleaning
