GE VersaMax IC200PWR001 User Manual page 354

Analog input module IC200ALG264 / IC200ALG266 provides an interface to 15
current inputs. The inputs are single-ended, with all inputs sharing a common
return. Module IC200ALG266 is rated for use in SIL2 applications.
The module receives power from the backplane power supply. No external
power source is required for module operation. Power for the user's
transceivers must be supplied from an external source.
Intelligent processing for this module is performed by the CPU or NIU. The
module provides 15 words of analog input data.
Module ALG266 contains active circuitry to protect the input sense resistors. If
an input is accidentally connected to +24V field power, the module clamps input
current at 40mA maximum to prevent damage from excessive power.
Additional protection for the sense resistors is provided by opening the input
loop while the ALG266 module is powered off. That means when the module is
powered off, any connected external transmitters that perform open wire fault
detection will see the open input loop as an open wire fault, and any external
receivers connected in series with the module will not receive a valid signal.
Both should be considered when planning the application.
LED Indicators
The green OK LED is ON when backplane power is present, internally
generated field power is functioning properly, the module has been configured,
and the module has been recognized on the backplane.
GFK-1504N Chapter 10 Analog Input Modules
IC200ALG264, IC200ALG266
Analog Input Module, 15 Bit Current 15 Channels
ANALOG INPUT
CURRENT
OK
IC200ALG264
15BIT
15CH
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