GE IS200STCIS6AED DIN RAIL CONTACT INP

Description

GE General Electric Technical Specifications: IS200STCIS6AED

The IS200STCIS6AED MDX-BCLK module has on-board rechargeable

batteries. Pins 3-4 on header J4 allow disconnection of

these batteries when the system is to be powered down and

the clock function is not needed. Removing the jumper

disconnects the batteries, thus IS200STCIS6AED preventing discharge.

The MDX-BCLK module can function with a 5 volt supply

because the 12 volt supply is only used to decrease battery

charge time. In order to select 5 volt only operation, pins 1

and 2 must be strapped on Header J4. Note: this mode

increases the charge time to 36 hours for a full charge at

25°C.

The power fail detection circuit senses when the 5 volt

supply to the BCLK falls below 4.7 volts. If the 5 volt line

remains IS200STCIS6AED below this threshold for more than 9 microseconds,

access to the board will be disabled. The 9 microsecond

delay is a result of the RC time constant used in the SPF,

system powerfail circuitry. This circuitry is composed ofthe

ICL 8211, U1 (voltage reference); an MC14538B, U2 (dual

multi-vibrator); and an MC14013B, U7 (D-type flip flop). The

battery-backed CMOS clock circuitry remains active during

SPU; access only to read or write is inhibited. The system

power up, (SPU), signal is IS200STCIS6AED used to re-enable board access

and may be active from 4.7 volts typical to 4.85 volts

maximum. The SPU one shot U2, has a time-out of 5 ms to

allow for stable power supply voltage before enabling board

access. Because of the level at which the BCLK module

becomes re-enabled, the user must set the power supply

voltage at the board bus interface, connector J1, to a

minimum of 4.9 volts (5 volts recommended)

Adjustment of R2 establishes the voltage level at which tlie

MDX-BCLK module recognizes power fail. This’ level is

factory set at 4.7 volts and should not be changed. If R2

requires adjustment, the following procedure should be

used:

‘

4. a) Adjust a power supply such that 4.7 volts is present on

the 5 volt input (Pins 1 and 2 on J1).

1. b) Connect an oscilloscope or a voltmeter to the output of

the ICL8211 (Pin 4 of U1).

1. c) Adjust R2 until the voltage on Pin 4 of the ICL8211 goes

to a high level (greater than 2.4 V).

1. d) Slowly adjust R2 in the opposite direction until the

voltage goes to a low level (less than .7 V).

1. e) The ICL8211, U 1 provides 50 mV hysteresis typically

between system power up sig

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