CHAPTER 1: GETTING STARTED
1.4 650 HARDWARE
GEK-106310-AF
F650 DIGITAL BAY CONTROLLER
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1.4 650 hardware
1.4.1 Mounting & wiring
Refer to Chapter 3. Hardware for detailed mounting and wiring instructions.
1.4.2 650 communications
The Enervista 650 Setup software communicates with the relay via the faceplate USB port in hardware 04 (E in order code)
or
RS232 port or the rear RS485/Ethernet ports. To communicate via the faceplate RS232 port, a standard “straight-
through” serial cable is used. The DB-9 male end is connected to the relay and the DB-9 or DB-25 female end is connected
to the PC COM1 or COM2 port as described in Figure 1-1: Relay- PC connection for RS232 front port. To communicate via
USB port a male A / male B USB shielded wire is needed
To communicate via the F650 rear RS485 port from a PC RS232 port, the GE Multilin RS232/RS485 converter box is
required. This device (catalog number F485) connects to the computer using a “straight-through” serial cable. A shielded
twisted-pair (20, 22 or 24 AWG according to American standards; 0.25, 0.34 or 0.5 mm
2
according to European standards)
connects the F485 converter to the F650 rear communication port.
To minimize communication errors that can be caused by external noise, a shielded twisted pair is recommended. In order
to avoid loops where external currents can flow, the cable shield must be grounded at one end only.
The converter box (-, +, GND) terminals are connected to the relay (SDA, SDB, GND) terminals respectively. For long
communications cables (longer than 1 km), the RS485 circuit must be terminated in an RC network (i.e. 120 ohm, 1 nF). This
circuit is shown in Figure 1-2: RS485 connection for 650 units, associated with the text Zt(*).
Figure 1-1: Relay- PC connection for RS232 front port
To minimize errors from noise, the use of shielded twisted pair wire is recommended. For correct operation, polarity must
be respected, although a different polarity will not damage the unit. For instance, the relays must be connected with all
RS485 SDA terminals connected together, and all SDB terminals connected together. This may result in confusion, as the
RS485 standard refers to terminals “A” and “B”, although many devices use terminals labeled “+” and “-“.
Summary of Contents for F650
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