Monarch Instrument DC 2000 - Manual (Page 12)

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Chapter 1 General Description
1.2 Recording Options
The Recorder can be ordered with one of three storage mediums: a standard PC compatible floppy disk drive,
an industry-standard PCMCIA memory card drive, or a Zip drive. The optional Companion Software supports all
three media types.
1.2.1 Floppy Disk Drive
The Floppy disk drive uses PC compatible 3½ inch (89mm) floppy disks. These disks store 1.44 Megabytes
of data which translates to approximately 700,000 data samples (each sample is 16 bits). The disks are
magnetic media and the drives are mechanical. This limits their use in harsh environments where vibration or
temperature is a problem, but they are convenient as they are very inexpensive and can simply be plugged into
any IBM compatible PC.
1.2.2 PCMCIA Memory Card
The PCMCIA card (Personal Computer Memory Card Interface Association) is a small solid state card
containing Flash memory. The PCMCIA drive supports memory cards up to 200 Megabytes in size which is
approximately 100,000,000 data samples. The cards do require a special drive in your PC which is readily
available, inexpensive and already standard on many laptops and desktop machines. Contact your dealer
for details.
NOTE: It is recommended that a Sandisk 4-200 Meg Flash card be used.
1.2.3 Zip Drive
The Zip Drive stores 100 Megabytes of information which is approximately 50,000,000 samples for a 100
Megabyte Disk. This Recorder does not support 250 Megabyte Zip drives.
1.3 Recorder Options
Additional functions and capabilities can be added to the Recorder and are described in the following paragraphs.
1.3.1 Digital Input and Output
This option provides three or six mechanical form C (Normally Open, Common, Normally Closed contacts)
relay outputs capable of switching 250 Vac as well as three isolated digital control inputs, or three or six solid
state open collector type contacts able to switch 30 Vdc at 0.5 Amps. The relay outputs can be programmed
to respond to alarm events while the digital inputs can be used to trigger events such as changing recording
speeds or stopping and starting recording.
1.3.2 Communications Interface
There are two communications options available:
1.
An isolated RS232/RS485 interface using the Modbus protocol with the recorder acting as a slave device
in a Modbus RTU or Modbus ASCII environment.
2. An 802.3 compatible Ethernet option with RJ45 four wire connection.