Electrical connection
en
Installation and operating instructions Wilo DD-I
125
station operates autonomously from a higher-level control system. If the set-
point specification must be made by a higher-level control system, please con-
tact customer service!
ƒ
Level
Setpoint specification for the control modes in LSI system mode.
NOTICE! Requirements for the LSI system mode! Assign this function to an input.
ƒ
Pressure
Recording the current system pressure to record data.
NOTICE! Can be used as control value for the PID controller!
ƒ
Flow
Recording the current flow rate to record data.
NOTICE! Can be used as control value for the PID and HE controller!
The following functions can be assigned to the
relay outputs
:
ƒ
Run
Collective run signal
ƒ
Rising Level
Message for increasing level.
ƒ
Falling Level
Message for dropping level.
ƒ
System Error
Collective fault signal: Error.
ƒ
System Warning
Collective fault signal: Warning.
ƒ
Cleaning
Message when a cleaning sequence of a pump is active.
4.7
Electrical connection in poten-
tially explosive atmospheres
DANGER
Risk of fatal injury due to incorrect connection!
If the pump is installed within potentially explosive atmospheres, connect dry-run-
ning protection and thermal motor monitoring to "Safe Torque Off"!
• Observe the instructions of the frequency converter!
• Observe all instructions in this chapter!
If the pump is installed within potentially explosive atmospheres, observe the following
points:
Signal transmitter
ƒ
Install separate signal transmitter for dry-running protection.
ƒ
Connect float switch via Ex cut-off relay.
ƒ
Connect level sensors via Zener barrier.
Wilo-EFC frequency converter
ƒ
Install PTC thermistor card "MCB 112".
Observe the instructions of the frequency converter and the PTC thermistor card!
LSI system mode:
install one card per frequency converter!
ƒ
Connect the PTC sensor to the PTC thermistor card "MCB 112":
Terminals T1 and T2
ƒ
Connect PTC thermistor card "MCB 112" to "Safe Torque Off (STO)":
–
PTC thermistor card "MCB 112" Terminal 10 to terminal 33 on the frequency con-
verter.
–
PTC thermistor card "MCB 112" Terminal 12 to terminal 37 on the frequency con-
verter.
ƒ
Connect dry-running protection additionally to the PTC thermistor card "MCB 112".
Terminals 3 to 9
DANGER! LSI system mode: Connect dry-running protection to all frequency con-
verters!
Summary of Contents for DD-I
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Page 3: ...3 Chinese simplified 4 English 96 ...
Page 5: ...zh CHS 安装及操作说明 Wilo DD I 5 9 1 现场总线 参数概览 69 9 2 LSI 系统模式的示例电路图 88 ...
Page 89: ...附录 zh CHS 安装及操作说明 Wilo DD I 89 另请参见 2 LSI系统模式 不带Ex的连接示例 90 2 LSI系统模式 Ex的连接示例 93 ...
Page 90: ...zh CHS 附录 90 WILO SE 2020 12 9 2 1 LSI系统模式 不带Ex的连接示例 ...
Page 91: ...附录 zh CHS 安装及操作说明 Wilo DD I 91 ...
Page 92: ...zh CHS 附录 92 WILO SE 2020 12 ...
Page 93: ...附录 zh CHS 安装及操作说明 Wilo DD I 93 9 2 2 LSI系统模式 Ex的连接示例 ...
Page 94: ...zh CHS 附录 94 WILO SE 2020 12 ...
Page 95: ...附录 zh CHS 安装及操作说明 Wilo DD I 95 ...
Page 188: ...en Appendix 188 WILO SE 2020 12 9 2 1 LSI System mode connection ex ample without Ex ...
Page 189: ...Appendix en Installation and operating instructions Wilo DD I 189 ...
Page 190: ...en Appendix 190 WILO SE 2020 12 ...
Page 192: ...en Appendix 192 WILO SE 2020 12 ...
Page 193: ...Appendix en Installation and operating instructions Wilo DD I 193 ...
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