Appendix A: System calculations
252 EST3X Technical Reference Manual
Worksheet A: Control panel current
Instructions: Enter the number of option cards installed in the control panel under Quantity, then calculate the standby
and alarm currents using the values below, and then calculate the total at the bottom.
Devices
Qty
Standby
current
(mA)
Alarm
current (mA)
Qty x Standby
current (mA)
Qty x Alarm
current (mA)
Base panel [1] 1 378.0 482.0 378.0 482.0
Display modules [2] 2.0 2.0
3-LDSM 5.0 5.0
3-SDC1 [3] 120.0 132.0
3X-NET8 98.0 98.0
3X-NET 98.0 98.0
3X-FIB8 [4] 105.0 105.0
3X-FIB [4] 105.0 105.0
3X-ETH1 42.0 54.0
CLA-PS10 2.0 2.0
3X-PMI [5] 23.0 29.0
3-SSDC1 [6] 144.0 204.0
3-SDDC1 [6] 264.0 336.0
3-AADC1 [6] 175.0 205.0
3-IDC8/4 48.0 408.0
3-OPS 53.0 147.0
3-MODCOM 60.0 95.0
3-ZA20(A/B) 62.0 1120.0
3-ZA40(A/B) 62.0 2480.0
Totals (mA)
[1] Includes the PS10-4B, the SFS1-CPU, one 3-SDC1 card with a fully loaded loop, and a 4X-LCD(-LC).
[2] Add 1.5 mA for each active LED and 5 mA if the display module is connected to a 3-LDSM.
[3] Standby and alarm current values are for a fully loaded loop.
[4] Add 71.2 mA for each SMXLO2, 76.8 for each SMXHI2, and 20.0 mA for each MMXVR.
[5] Includes EAEC card currents.
[6] A 3-SSDC1 card with two 3-SDC1 cards is the same as one 3-SDDC1 card.
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