
Chapter 3 • Hydran 201C
i
Controllers
3-10
Rev. 6, March 2011
Part 17997
2.
Door-Mounted Alarm Indicators and Push-buttons
: The two illuminated push-
buttons are mounted on the cabinet door of the instrument. Each local indicator
latches on when the corresponding gas alarm relay is energized. The indicator
remains on when the alarm relay turns off and it must be cleared (or “acknowledged”)
by pressing the illuminated indicator. The indicator clears only when the corre-
sponding gas alarm relay has de-energized.
3.
Enclosure
: The H201C
i
-1 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).
An internal view of the H201C
i
-1 is presented in Figure 3-6 on page 3-11.
4.
Digital Display Circuit Board Cover
: This cover protects the display circuit board,
which includes the digital voltmeter and the connections of the two push-buttons.
5.
Electronic Circuit Board
: The circuit board incorporates all the electronic functions
of the H201C
i
-1: H201T
i
TDM pulse decoder, alarm relay drivers, configurable
analog output amplifiers, display signal conditioning, supervisory link supply,
communication ports and modem (optional) management, enclosure heater control,
and ac supply voltage selector. See Section C.3 on page C-3 for a simplified block
diagram of the circuit.
6.
Main Terminal Block
: The ac power supply, the analog output, the three alarm relays
(Alarm 1 = Gas High, Alarm 2 = Gas High-High, and System OK), the supervisory
link cables and the RS-485 LAN are connected to this 40-screw terminal block. For
wiring details, see Table D-11 on page D-8.
3.2.3
Description of the Circuit Board
The circuit board of the Hydran 201C
i
-1 is presented in Figure 3-7 on page 3-12.
7.
RS-232 Computer Port Connector, DB-9 Male (J10)
: This standard connector is used
to interface the H201C
i
-1 directly to a PC or to a smart modem. For wiring details,
see Table D-13 on page D-11. The J16 USB computer port (item 8 in Figure 3-7 on
page 3-12) is also available.
CAUTION
WARNING
ELECTRICAL SHOCK HAZARD. Voltage of 115 or 230 Vac is
present on several connecting screws of this terminal block.
Summary of Contents for Hydran 201i
Page 1: ...GE Energy Services Digital Energy Hydran Instruction Manual 201i System ...
Page 6: ...Instruction Manual vi Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 8: ...Instruction Manual viii Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 22: ...Instruction Manual xxii Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 36: ...Chapter 1 Introduction 1 10 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 114: ...Chapter 5 Before Installation 5 16 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 143: ...Installation Part 17997 Rev 6 March 2011 6 29 Figure 6 9 Installing the CPU Module ...
Page 236: ...Chapter 12 Troubleshooting 12 20 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 244: ...Chapter 13 Maintenance 13 8 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 254: ...Appendix B Mechanical Drawings B 2 Rev 6 March 2011 Part 17997 Figure B 3 1 5 In Adaptor ...
Page 255: ...Hydran 201Ti Intelligent Transmitter Part 17997 Rev 6 March 2011 B 3 Figure B 4 1 In Adaptor ...
Page 284: ...Appendix G Unit Conversions G 2 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 298: ...Appendix I Glossary I 12 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Page 299: ......