- Emerson Remote Terminal Unit Instruction Manual

CI-ControlWave Express Appendix C - Hardware Installation Guide / C-5
Step 1. Hardware Configuration (Continued)
3. Make sure that the Lithium Backup Battery has been enabled, i.e., Backup Battery
Jumper W3 on the CPU/System Controller Assembly should be installed on jumper
posts 1-2). Configure the CPU/System Controller Board DIP-Switches and Jumpers.
Tables C-1 through C-3 provides overviews of the switch settings (see Figure C-2).
Configure the Process I/O Board’s DIP-Switches and Jumpers (see Figure C-3). After
configuring the Jumpers and DIP-Switches, install the Process I/O Board and the
CPU/System Controller Board (as one assembly) into the enclosure.
4. Configure/Connect appropriate communication port(s) (see Section 2.3.3.2). Connect
COMM. Port 1 (Local Port) or 2 of the ControlWave Express (depending on CPU/System
Controller Board Switch SW2 settings - see Section 2.3.3.1) to a Communication Port of
a PC (typically PC COMM. Port 1). Note: Also see Section 2.4.4.
A ControlWave Express can be configured as a Master or Slave node on either a
MODBUS network or a BSAP network. A variety of communication schemes are
available. Three communication ports are contained on the standard CPU/System
Controller Board. These communication ports are designated as follows:
CPU/System Controller Board:
COM1 - Port 1: J4 (9-Pin Male D-Sub) or J11 (3-Pin Male connector) - RS-232 (choice
of connector determined by setting of jumper W18.)
COM2 - Port 2: TB3 (8-Pin Term. Block) RS-232
COM3 - Port 3: TB3 (5-Pin Term. Block) RS-232/RS-485 - Configured by Jumpers W12
through W16 (When set for RS-485 operation, COM3 is used to
configure Receiver Biasing and Termination.)
Communication Ports COM1, COM2 and COM3 support serial asynchronous operation
as listed above. Any communication port (COM1, COM2 or COM3) can be configured for
local communications, i.e., connected to a PC loaded with ControlWave Designer and
OpenBSI software. The pin labels for the various RS-232/485 interface connectors are
provided in Tables C-4A and C-4B.
RS-232 & RS-485 Interfaces
ControlWave Express RS-232 & RS-485 communication schemes are discussed herein.
RS-232 Ports
An RS-232 interface supports Point-to-Point, half-duplex and full-duplex
communications (20 feet maximum, using data quality cable). Half-duplex
communications supported by the ControlWave Express utilize MODBUS or BSAP
protocol, while full-duplex is supported by the Point-to-Point (PPP) protocol.
ControlWave Express RS-232 ports utilize a “null modem” cable (Figure C-4 - Top) to
interconnect with other devices such as a PC, printer, a ControlWave-series unit (except
CW_10/30/35) when the ControlWave Express is communicating using the full-duplex
PPP protocol. A half-duplex cable (Figures C-4A - Bottom) may be utilized when the
ControlWave Express is connected to a ControlWave series unit (except CW_10/30/35).
If communicating with a Bristol series 3305, 3310, 3330, 3335 or CW_10/30/35
RTU/DPC, one of the cables shown in Figure C-4B must be used. Refer to Figure C-4C
to connect ControlWave serial RS-232 port COM2 to either an external modem or
external radio. When interfacing to Port COM3 of a ControlWave unit, or to COM5 or
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