Communications & Networking; Forming A Local Network Of Hydran M2S; Figure 37: Network Overview (Daisy Chaining Of Hydran M2S); Figure 38: Local Communications With A Laptop Computer (For Service Only) - GE hydran m2 Installation Manual

Hydran* M2 Installation Guide
COMMUNICATIONS & NETWORKING
For detailed information, refer to Chapter 5 of the Hydran M2 Instruction
Manual.

Forming a Local Network of Hydran M2s

Daisy chain: RS-485 link, isolated, 1 triad
Maximum number of Hydran M2s: 32
Maximum total length of cables: 1,200 m (4,000 ft)
16375 v9.0 Oct 12

Figure 37: Network Overview (Daisy Chaining of Hydran M2s)

CAUTION: The LEDs used for the fiber optic transmitter are classified
as IEC 60825-1 Accessible Emission Limit (AEL) Class 1. Class 1
devices are considered eye safe to the naked eye. Do not view
directly with optical instruments.

Figure 38: Local Communications with a Laptop Computer (for service only)

DB-9
RS-232 Link
connector
To host computer
with Hydran M2
Host via either:
• Ethernet (wire
or fiber optic)
• Modem
interface.
• Or RS-485 link
to Hydran 201Ci
controller
Laptop computer:
− Fixed baud rate
− 8 data bits
− No parity
− 1 stop bit
− No flow control
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