Distech Controls EC-NPB-2X-485 Hardware Installation Manual

This document covers the mounting and wiring of the
EC-NPB-2X-485 option card in a Distech Controls
AX
EC-BOS controller, including EC-BOS-2/3/6
AX AX
EC-BOS-7 , or EC-BOS
Table 1 EC-NPB-2X-485 option description.
Description Notes / COM Port Assignments
Dual port, Recent option cards have jumpers for
optically isolated enabling onboard bias resistors. See
RS-485 adapter, "Preparation,"
with two
Most EC-BOS
3-position,
slots, where COM assignments are:
removable
•
EC-BOS-2/3/6
screw-terminal
single RS-485 option in Slot 1: COM3,
connector plugs.
COM4.
If two RS-485 options, ports are Slot 1:
See Figure 3 on
COM3, COM4 and Slot 2: COM5, COM6.
page 2 for
•
EC-BOS-7
location of
Slot 1: COM5, COM6.
Option Slots 1
If two RS-485 options, ports are Slot 1:
and 2 on an
COM5, COM6 and Slot 2: COM7, COM8.
AX
EC-BOS-2/3/6
Also see "COM Port Usage,"
.
Refer to the appropriate EC-BOS
installation document for further installation details.
Included in this Package
Included in this package find the following items:
• EC-NPB-2X-485 option card, connector end plate,
and (if recent model) four 2-pin jumper blocks.
• Two 3-position terminal plugs, for wiring to an
RS-485 network.
• This EC-NPB-2X-485 Option Hardware Installation
Guide, 05DI-HI2X485-13.
Material and Tools Required
The following may be required for installation:
• #2 Phillips screwdriver: used to install the card.
• Small flat-blade screwdriver: used for making
wiring connections to the RS-485 networks.
EC-NPB-2X-485 Option
05DI-HI2X485-13
EC-NPB-2X-485 Option
HARDWARE INSTALLATION GUIDE
AX
,
Security series.
page 1, for more details.
AX
models have two option
AX AX
, EC-BOS Security: If
AX
: If single RS-485 option in
page 3.
AX
hardware
Updated: September 2014
Figure 1 EC-NPB-2X-485 option.
Preparation
Examine the component side of the option card to see
if bias resistor jumper pins are available. See
If so, you may wish to enable biasing for either (or
both) RS-485 ports before mounting the card—you
cannot reach these jumpers when the card is installed.
Figure 2 Jumpers to enable RS-485 bias resistors.
to bias to bias
this port
this port
An earlier EC-NPB-2X-485 option card does
Note
not have Bias jumpers. It operates like the
newer option card in factory-shipped state
(jumper blocks not installed—no biasing).
Installing jumpers to enable biasing adds two onboard
3.3K ohm resistors into an RS-485 port's circuit:
• from RS-485 "+" to 5V.
COM3 / COM5
T X R X
COM7
s
R S
See Notes in
4 8 5
Table 1.
COM4 / COM6
T X R X
s
COM8
Figure 2.
Screened
diagram shows
how to enable a
port's Bias
resistors
(two jumper
blocks on the
header pins).
Jumper pins to
enable RS-485
Bias resistors
(found on newer
cards only)
1