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Appendix E
I/O Power Supply Current
The I/O power supply current to be supplied to the V and G terminals of each Digital I/O Slave Unit is provided
by the following equation.
The points to which I/O power must be supplied are divided into small blocks. The I/O power supply currents
supplied to these points are calculated in block units.
For example, in a CRT1-ID16TA Slave Unit, the points are divided into two blocks. One includes 8 points on the
left: Inputs 0 to 7. The other contains 8 points on the right: Inputs 8 to 15. Currents are calculated for each
block.
Input Unit
The I/O power supply current supplied to V and G terminals = input current (for number of points used) + cur-
rent supplied to input devices (for number of points used) * + I/O power supply current consumption
* This value does not apply to 2-tier terminal block type slaves.
Calculate using I/O power supply current supplied to V and G terminals = input current (for number of
points used) + I/O power supply current consumption.
Output Unit
The I/O power supply current supplied to V and G terminals = rated output current (for number of points used)
* + current supplied to input devices (for number of points used) + I/O power supply current consumption
* Compare with the restricted value for common and apply whichever value is the smallest.
(Example)
Case of having seven 30-mA sensors connected to the CRT1-ID08TA
I/O power supply current supplied to V and G terminals = (6 mA x 7 points) + (30 mA x 7 points) + 5 mA =
257 mA
Summary of Contents for CRT1 - 10-2009
Page 1: ...Cat No W457 E1 07 CompoNet Slave Units and Repeater Unit CRT1 Series OPERATION MANUAL...
Page 2: ......
Page 3: ...CRT1 Series CompoNet Slave Units and Repeater Unit Operation Manual Revised October 2009...
Page 4: ...iv...
Page 6: ...vi...
Page 10: ...x...
Page 16: ...xvi...
Page 24: ...xxiv Conformance to EC Directives 6...
Page 386: ...362 Units with Connectors Section 6 7...
Page 414: ...390 Temperature Input Units Section 7 5...
Page 430: ...406 Expansion Unit Specifications Section 8 2...
Page 494: ...470 Bit Slave Units with Compact Connectors Section 9 5...
Page 501: ...477 Repeater Unit Section 10 2 Dimensions 42 3 50 3 1 27 5 95 mm...
Page 502: ...478 Repeater Unit Section 10 2...
Page 508: ...484 CX Integrator Section 11 1...
Page 509: ...485 CX Integrator Section 11 1...
Page 602: ...578 Temperature Input Unit Functions Section 11 6...
Page 614: ...590 Device Maintenance Section 12 3...
Page 664: ...640 I O Power Supply Current Appendix E...
Page 672: ...648 Index...
Page 674: ...650 Revision History...