Contemporary Control Systems BASremote Installation Guide - Manual (Page 7)

TD040300-0II
7
INSTALLATION
The BASR is intended to be mounted in an industrial enclosure or wiring
closet on 35-mm DIN-rail or panel-mounted with screws (not provided). The
panel-mounting tabs are packaged in a plastic bag within the shipping box.
To use these tabs, Figure 6 illustrates how the two studs of each tab are press
fitted into their respective holes in opposing corners of the case. See Figure 5
for the mechanical details.
Figure 6 — Attaching Panel-Mounting Tabs
C ONNECTING E XPANSION E QUIPMENT
Input/output points beyond those available from the BAS Remote Master
module can be increased by adding BAS Remote Expansion modules or by
attaching Modbus serial devices to the MB bus. The MB port is used for
connecting to 2-wire Modbus serial devices while the DN port is used for
connecting to BAS Remote Expansion modules. Both ports are non-isolated
EIA-485 compatible.
When installing equipment, make a record that identifies the power source,
equipment locations, IP and MAC ID numbers, protocol in use, baud rate,
cable colour coding, etc. — anything that will be helpful for future staff.
Expansion Module Connections
Expansion modules are intended to occupy positions to the right or left of the
master module on the same DIN-rail or on additional DIN-rails within the
same control panel. In this situation only a short 2-wire twisted-pair cable is
needed for making connections between DN on the master module and UP on
the first expansion module. Up to three expansion modules can attach to the
master module using a daisy-chain wiring scheme. The second expansion
module has its UP port connected to the preceding expansion module’s DN
port. The last expansion module will have a vacant UP port. The D+ terminal
on one device must attach to the D+ terminal on the other. The same applies
to the D– terminals. Bias and termination exists on the UP terminals. See
Figure 9 for wiring details. For short connections, unshielded cable can be used.
Expansion modules are automatically assigned Modbus addresses beginning
with 2 based upon its position to the master within the daisy-chain wiring.