22
TS4000
To Connect a MODBUS Device to the TB1 Block
The TS4000 TB1 terminal block supports signals for two MODBUS channels. You can attach
cabling to connect these signals to MODBUS-compatible devices in a control room using the
TS4000 signal pinouts shown in the following table:
Table 9: Connection to Control Room MODBUS Devices
From
To
From
To
TS4000
First Device
TS4000
Second Device
TB1-2 MOD1-
Refer to the
documentation
TB1-4 MOD2-
Refer to the documentation
TB1-3 MOD1+
Refer to the
documentation
TB1-5 MOD2+
Refer to the documentation
To Connect a Device for Remote Calibration or Relay Reset to the TB1 Block
Connectors TB1-6 and TB1-7 can be cabled to a separate device to provide the ability to
remotely calibrate the TS4000 and reset the TS4000 relays. To view the TS4000 LED display
and use the remote calibration switch effectively, the device must be mounted within view of the
display.
Table 10: Connections to Remote Calibration and Relay Reset Devices
From
To
TS4000
MODBUS Device
TB1-6 Remote CAL
Refer to the device documentation
TB1-7 Remote Reset
Refer to the device documentation
3.5.5 Connecting to the +24VDC Power Supply
The TS4000 operates on +24 VDC power. You must connect the TS4000 to a primary DC
power source.
For Information on the maximum distance between the TS4000 and the control room
equipment, refer to Section 9.5. Each cable run should be as short as possible.
WARNING:
To protect the system from shorting, and to ensure the safety of installation
personnel, the 24VDC wire must be the
last
wire connected and the
first
wire disconnected. In addition, the power supply
must
remain
OFF
until all
other cabling has been completed; refer to the power supply manual for
instructions.
NOTE:
The TS4000 is designed to continuously monitor the presence of hazardous gas leaks.
A power switch is not included for the TS4000 to prevent accidental system shut down.
Powering the system on and off is done from the power supply. An internal diode
protects the TS4000 in the event of inadvertent power supply reversal.