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Sales Offices -
International: (928) 443-9391 US: (800) 281-2683 Europe: (31) 20-6238-983
www.rdlnet.com
1. Product Descriptions
SYS-CS1 System 84 Control Interface
The SYS-CS1 model is intended to control the RDL System 84
Audio Mixing Matrix products.
RU2-CS1 Serial Controlled Interface
The RU2-CS1 model is intended to control various RDL modules
and other manufacturers’ equipment equipped with open-collector control inputs.
Note: OEM product open-collector inputs must be compatible with current capability of RU2-CS1 control outputs.
Features Common to Both Models
Both models include eight status input terminals to monitor
external contact (switch or relay) closures or open-collector activations. These terminals are pulled high in
the CS1 to 5 Vdc and are protected against damage by external equipment or modules that may pull these
terminals as high as 30 Vdc.
There are also eight 0 to10 volt DC outputs that have 256 steps of resolution. Each may be programmed
to operate in the 0 to 5 volt DC range with no loss of resolution. These voltage outputs may also be
programmed to ramp to any valid level at rates programmable from 0.5 seconds to 128 seconds full scale.
The ramp rate may be individually set for each output.
Front-panel LEDs are provided to indicate power, command good/error, RS-232 communication and input/
output activity. All electrical connections are on the rear panel and employ depluggable connectors. The
RS-232 serial cable is not provided. Both products are in the same size chassis which is one RU (rack unit)
high and two-thirds wide. Either CS1 model will occupy 2 of 3 bays in an available RDL RU-RA3 rack
mounting accessory.
Note: References in this manual that apply to both SYS-CS1 and RU2-CS1 will use the term: CS1
2. Computer Communications and Connections
RS-232 Communication
The CS1 communicates with a host controller using an RS-232 connection. It
is a full duplex product, meaning it can receive and send data simultaneously. It does not employ any
hardware handshaking but instead can use return communication codes to communicate properly. The
baud rates available are: 2400, 4800, 9600 and 19200. The format is:
no parity bit
8 data bits
one stop bit
no hardware or software handshaking
RS-232 Connection
The required cable to connect to a personal computer’s 9 pin serial port is a
straight through 9 pin male to 9 pin female cable. These are commonly referred to as extension cables and
are usually available locally. For use on a 25 pin port, a 25 pin to 9 pin serial cable must be used. The pins
used by the CS1 are 2 (RX data), 3 (TX data) and 5 (ground). All other pins on the CS1’s RS-232 connector
are wired only to the 6 pin depluggable header to the left of the RS-232 DB-9 connector as viewed from the
rear. These are available for customer use in the event that the controller being used requires hardware
handshaking. One such example may be RTS – CTS handshaking in which case installing a jumper wire
between the pins labeled 7 and 8 may enable proper communication. When using the Windows terminal
program Hyper Terminal or Visual Basic developed applications, jumpering these extra pins will not be
required.
