Verification Of Rs-232 And Rs-485 Communications - GE Hydran 201 i Instruction Manual

Chapter 7 • Hydran 201Ci-C Installation
2. On each Hydran 201Ci-C, look at the Heater indicator (yellow, DS8; item 13 in
Figure 3-3 on page 3-5):
• The LED must initially be lit if the ambient temperature is below approximately 25 °C
(77 °F).
• After a while, the LED must flash as the enclosure temperature reaches the above set
point.
• The LED must remain off if the ambient temperature exceeds the set point.
7.2.3

Verification of RS-232 and RS-485 Communications

If your installation includes only one Hydran 201i System and if it communicates with the
host computer running the Hydran Host software, you must verify the RS-232 link. If your
installation includes several Hydran 201i Systems forming a local network, you must also
verify the RS-485 local network link. Proceed as follows:
1. Put all Hydran 201Ci-C's in a common network by connecting the RS-485 LAN
cable from one H201Ci-C's RS-485 LAN connector (J11; item 11 in Figure 3-3 on
page 3-5) to the next in a daisy-chain fashion. Refer to Chapter 9.
2. Ensure all Hydran 201Ti's and all H201Ci-C's are connected together.
3. Connect the DB-9 male RS-232 connector (item 2 in Figure 3-2 on page 3-3) or the
RS-232 Computer Port connector (J10; item 7 in Figure 3-3 on page 3-5) of any
H201Ci-C on the network to your PC's RS-232 port. For wiring details, see Table D-7
on page D-4.
4. In the Communication submenu of each H201Ti, write down the current settings, in
order to be able to restore them.
5. Set the parameters as follows:
• Comm Channel = Supervisory Link
• DefaultChannel = Supervisory Link
• Baud Rate = 9600
• Gas Monitor ID = 1
7-4 Rev. 6, March 2011 Part 17997