Description Of The Major Components - GE Hydran 201 i Instruction Manual

Chapter 3 • Hydran 201Ci Controllers
32 H201Ci-C's (and/or Hydran 201Ci-1's) can be networked via an RS-485 Local Area
Network (LAN).
The H201Ci-C features:
• A digital circuit board to control all communications, including networking.
• A terminal block to connect the ac power supply.
• A terminal block to connect the H201Ci-C and the H201Ti's with a supervisory link.
• Connectors for the communication cables:
– RS-232 or USB link toward a host computer or a modem.
– RS-485 link toward other H201Ci Controllers to establish a network.
• Network and communication management. The H201Ci-C (or any other Hydran 201Ci
Controller in a local network) is connected to the host computer with an RS-232 or USB
link or a modem (optional) and to each H201Ti with a supervisory link. A maximum of
32 H201Ci Controllers (H201Ci-C and/or H201Ci-1) can be connected together with an
RS-485 link to establish a local network that can contain up to 128 H201Ti's. For details
on network configurations, see Chapter 9.
3.1.2

Description of the Major Components

An internal view of the Hydran 201Ci-C is presented in Figure 3-2 on page 3-3.
1. Enclosure: The H201Ci-C cabinet is rated Type NEMA 4X. With the standard
internal heater, the instrument operating temperature ranges from -40 to +55 °C (-40
to +131 °F).
2. DB-9 Male RS-232 Connector: This standard DB-9 male serial communications
connector, housed in a small connection box, allows easy connection of an external
PC.
3. USB Computer Port Connector, Type B: This standard USB (type-B) female serial
communications connector allows to easily connect a PC.
4. Electronic Circuit Board: The circuit board incorporates all the electronic functions
of the H201Ci-C: Isolated supervisory link supply, communication ports and modem
(optional) management, enclosure heater control, and ac supply voltage selector.
3-2 Rev. 6, March 2011 Part 17997