4.5. The maximum allowable conditions at the inputs
and outputs of signal lines.
Under the maximum permissible conditions are meant such currents and voltages that do not
lead to failure or irreversible degradation of the characteristics of the E-502. At the same time, the
maximum permissible conditions may not provide the performance characteristics of the product.
!
Long-term operation of equipment at maximum permissible levels is not allowed
Table 4-3 Maximum permissible E-502 input/output conditions
Circuit/ Signal
Maximum permissible modes description
Inputs X1÷X16, Y1÷Y16, GND32
±15 V relative to AGND
Outputs DAC1, DAC2
± 20 mA when the total load power is not exceeded, see
section
O15 V, -15 V
No more than 30 mA in load circuits when the total load
power is not exceeded, see section
SC is not permitted.
Inputs DI_SYN1
± 10 V relative to the DGND circuit with an internal input
resistance of, at least, 1 kΩ.
Digital inputs DI1÷ DI13, DI_SYN2
From -0.4 to +6.5 V relative to the DGND circuit
Digital inputs of dual purpose DI14 /
DI_SYN2, DI15 / СONV_IN, DI16 /
START_IN
From -0.4 to +3.6 V relative to DGND circuit
DO digital outputs
From -0.4 to +3.6 V relative to the DGND circuit, the
current is not more than ± 20 mA. When the power is on, the
total load power should not exceed the calculated value,
according to section
TX, RX signals on the internal UART0
connector
From -0.2 to + (Vcc + 0.2) V relative to the GND circuit,
where Vcc is the E-502 internal voltage of 3.3V.
The load current is not more than ± 8 mA.
Table 4-4 Maximum permissible through currents by common wires circuits:
Maximum permissible through-current by the
circuits of one E-502 module:
AGND-DGND
100 mA
Maximum permissible through-currents by circuits
GND, 0 V, GND_USB, CHASSIS
(on any contour into which covers these circuits)
100 mA
The maximum permissible voltage rise rate
between galvanically isolated circuits in E-502
10 kV / μs
The maximum permissible circuit modes of JTAG connectors are not considered, since the
scope of application of JTAG is limited to the standard types of JTAG emulators and the
specified connection procedure, according to i.
, p.
39
.
5
The notion of circuits GND, AGND, DGND is introduced in section
