Sentry 5000-32-IT Controller
Page 11 of 82
2.3
Interface Boards
An Interface Board plugs into the Carrier Board to complete a Stack. The type of Interface Board is
determined during the Controller configuration process and includes:
•
Modbus
–
Section
•
Analog Input
–
Section
•
PSG Input
–
Section
•
Digital Input
–
Section
•
Analog Output
–
Section
•
Digital Output
–
Section
•
Eight removable connectors for the relay wiring
2.3.1 Modbus
The Modbus Interface Board (
) provides two separate RS-485 loops identified as Loop A and
Loop B. The board plugs into a Carrier Board to complete a Modbus Stack.
The function of the Modbus board is to provide connectivity for two loops of sensor modules. The board
includes:
(1) Factory installed ribbon cable for serial data pass through to the SBC
(2) Field connection for Loop A RS485 Modbus connections
(3) Field connection for Loop B RS485 Modbus connections
(4) Field connection for Trouble Relay
(5) Factory installed wire and ribbon cable connections for power and inter-stack communication
(6) Termination Resistors for RS485
; 120 Ω impedance matching for long wire runs
Each loop connector has five positions to provide 24 VDC power and shielded bi-directional Modbus
protocol communications for up to 16 sensor modules. Sensor modules have node-id selector switches
that must be set for addresses 1 through 16 on each loop.
The Modbus Stack is always installed in stack position 1 in the controller and has a stack address of 1. A
maximum of one Modbus Stack is allowed per controller. The Modbus Board also provides a
programmable SPDT Relay intended for use as a local Trouble Relay.
Figure 4: Modbus Interface Board
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Содержание Sentry 5000-32-IT
Страница 28: ...Sentry 5000 32 IT Controller Page 28 of 82 Figure 15 Analog Input Wiring ...
Страница 29: ...Sentry 5000 32 IT Controller Page 29 of 82 Figure 16 PSG Sentry Classic Wiring ...
Страница 30: ...Sentry 5000 32 IT Controller Page 30 of 82 Figure 17 Modbus Wiring ...
Страница 31: ...Sentry 5000 32 IT Controller Page 31 of 82 Figure 18 Top Board Relay Digital Output Wiring ...
Страница 32: ...Sentry 5000 32 IT Controller Page 32 of 82 Figure 19 Analog Output Wiring ...
Страница 33: ...Sentry 5000 32 IT Controller Page 33 of 82 Figure 20 Digital Input Wiring ...
Страница 34: ...Sentry 5000 32 IT Controller Page 34 of 82 Figure 21 Bottom Board Relay Wiring ...
