2-19
XRC Communication, Jumper Settings and Field Wiring, Cont.
Board
Configuration
Table 2–1 is a brief description of each configuration point on the XRC
Main Electronic Board and it’s function. The board diagram shows the
location of these items (see Figure 2–16).
Other Field
Wiring
For other wiring connections directly on the XRC Main Electronic Board,
use Figure 2–17. When wiring to the termination panel on the back of
the Panel Mount XRC unit, use Figure 2–15.
Table 2–2 XRC On-Board Jumper Settings
Jumper No.
Description
J7 & J10
RS-485 Termination.
When multiple XRC’s are daisy-chained together on
a single RS-485 bus, the bus must be properly terminated. When the XRC
is the “last” or “only” unit on the bus, the jumper should be across pins 1 &
2. If the unit is “first” or “intermediate” the jumper should be across pins 2 &
3.
J5, J9, J11 &
J12
Pulse Input Debounce.
When using any of the Digital Inputs as Pulse
Inputs you may want to enable Debounce for that input. Debounce enables
an RC Time Constant that will tend to “Debounce” noisy relay or switch
closures. However, if your PI is monitoring a fairly high-speed input,
enabling Debounce could cause you to lose some of the pulses.
J21, J22,
J24, J25 &
J26
Analog Input Configuration.
The XRC Controller Board supports both
“Voltage Input” and Current Loop Input” AI’s. A jumper across pins 2 & 3
establishes the associated AI as a 0-10VDC Voltage Input. A jumper
across pins 1 & 2 establishes the associated AI as a 0-20 milliamps
Current Loop Input.
J1
Lithium Battery Backup.
J1 enables and disables Memory Backup via the
lithium cell. A jumper across pins 1 & 2 enables RAM memory backup. If
the jumper is removed (or across pins 2 & 3) the lithium cell is NOT
enabled for memory backup. Should power be lost, or disconnected, while
the lithium cell is NOT enabled the XRC Main Processor Board will execute
a Cold Boot and all historical data WILL be lost.
S1
Security Switch.
If the Security Switch is ON and a local connection is
made to the unit via PCCU, the proper Security Code must be entered. If
the proper Security Code is not setup in PCCU the operator will be unable
to configure the XRC. If the Security Switch is turned OFF, the user will be
able to configure the XRC without secure access.
Continued on Next Page
Summary of Contents for XRC6490
Page 1: ...2100802 001 AB TOTALFLOW XSeries Remote Controller User s Manual ...
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Page 19: ...1 5 Standard Enclosure Cont RC 6790 X Figure 1 2 Model XRC6790 Continued on Next Page ...
Page 41: ...1 27 Totalflow Input Output Modules Cont Figure 1 16 XRC6990 Inside View ...
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Page 86: ...4 12 Replacing XRC 195 Board Cont Figure 4 5 XRC Board Connections ...
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Page 112: ...5 24 12V Communication Supply Voltage Test Cont Figure 5 9 XRC 195 Communication Wiring ...
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