ABB SPDSI13 Bailey power panel input and output card

Description

SPDSI13 The Terminal Block with box terminals (IC670CHS002) has 25 terminals for each module. Each

accommodates one AWG #14 (avg 2.1mm2 cross section) to AWG #22 (avg 0.36mm2 cross

section) wire, or two wires up to AWG #18 (avg. 0.86mm2 cross section). When an external jumper

is used, wire capacity is reduced from AWG #14 (2.10mm2 ) to AWG #16 (1.32mm2 ).

The I/O Terminal Block with SPDSI13 barrier terminals (IC670CHS001) has 18 terminals per module. Each

terminal can accommodate one or two wires up to AWG #14 (avg 2.1mm2 cross section).

The I/O Terminal Block with Connectors (IC670CHS003) has one 20-pin male connector per

module.

SPDSI13 The RTD module performs diagnostics and provides the diagnostic data to the BIU using its

configured discrete input (I) references, starting at the configured reference offset.

The RTD sets the appropriate bit when a diagnostic condition is detected. The bit remains set until

cleared.

Four optional discrete output bits in the BIU’s SPDSI13 discrete output (Q) table can be used to clear module

faults and alarms.

Setting the discrete output bit for an RTD clears all diagnostic bits for that RTD that may be set.

The Thermocouple Input Module accepts eight inputs from thermocouples and converts the input

level of each to a digital value. The module support a variety of thermocouple types, as listed in the

Module Specifications section.

SPDSI13 Each input can be configured to report data as millivolt or temperature (tenths of degrees Celsius or

Fahrenheit) measurements.

When thermocouples are measured, the module can be configured to monitor the thermocouple

junction temperature and correct the input value for cold junction.

On command from the module’s internal microprocessor, the solid-state, optically-coupled

multiplexer circuitry provides the present analog SPDSI13 value of a specified input to the analog-to-digital

converter. The converter turns the analog voltage into a binary (15 bits plus a sign bit) value

representing tenths (1/10) of degrees Celsius or Fahrenheit. The result is read by the module’s

microprocessor. The microprocessor determines if the input is over or under its configured range,

or if an open thermocouple condition exists.

When the module is configured to measure millivolts instead of inputs from thermocouples, the

result of the analog-to-digital conversion is a value reported in hundredths (1/100) of millivolts.

A Bus Interface Module handles the exchange of all I/O data for the modules in the I/O Station

over the communications bus.

The illustration below represents the main functional operations of the Thermocouple module.

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