1C31223G01 Channel Advantages of EMERSON Control System

Description

Bit 6 in the status register enables the 1C31223G01 Controller to monitor the status of the fifield

supply fuse, and it also gives a visual indication of the status via the “EXTERNAL

ERROR” LED.

The Controller enables this feature by writing a “1” to Bit 7 of the confifiguration

register. If enabled and the fifield supply voltage is between 15VDC and 60VDC, the

circuit indicates that the fifield supply fuse is OK by turning 1C31223G01 OFF the “EXTERNAL

ERROR” LED and clearing Bit 6 of the module status register. If enabled and the

fifield supply voltage is less than 0.4VDC, the circuit indicates that the fifield supply

fuse is blown by turning ON the “EXTERNAL ERROR” LED and setting Bit 6 of

the module status register.

If the card is operated with a fifield supply voltage less than 15V, the output circuit

will still operate properly. However, the blown fuse detection may not give an

accurate indication of the fuse state. In this case, the Controller has the capability to

disable the detection circuit by writing a “0” to Bit 7 of the confifiguration register.

When Bit 7 is a “0” the “EXTERNAL ERROR” LED is turned OFF and the blown

fuse status bit (Bit 6 of the status register) is 1C31223G01 cleared which indicates the fuse is OK.

P (Green) Power OK LED. Lit when the +5V power is OK.

C (Green) Communications OK LED. Lit when the Controller is communicating with the

module.

E (Red) External Fault LED. Lit when the 1C31223G01 fifield supply fuse is blown and the blown fuse

detection circuit is enabled. Blown Fuse bit (Bit 7) of the Confifiguration

Register (see Table 12-4) enables or disables the fuse detection circuit (high =

enabled).

I (Red) Internal Fault LED. Lit whenever the Force Error bit (Bit 1 of the Confifiguration

Register) (see Table 12-4) is active or the Controller stops communicating with

the module.

CH1 – CH 16 (Green) If the LED is lit, this indicates that the output is in the ON state.

If the LED is not lit, this indicates that the 1C31223G01 output is in the OFF state.

HART (Highway Addressable Remote Transducer) is a digital communication

protocol designed for industrial process measurement applications. Field

measurement devices (transmitters) interface a process control system via an analog

4-to-20 mA current loop. HART uses a low-level frequency shift-keyed sine wave

signal that is superimposed on the standard 4-to-20 mA process measurement

current loop. Since the HART sine wave signal is small and its average value is zero,

the current loop analog 4-to-20 mA signal is not signifificantly affected by the

presence of the HART signal. Using HART allows a fifield device to provide more

than one measurement, which is a feature not available when using only the 4-to-20

A analog current signal.

“Smart” fifield devices may be described as fifield devices in which the analog 4-to-20

mA signal, digital communication, and sometimes power, co-exist on the same pair

of wires. The 1C31223G01 Ovation HART Analog Input (HAI) module is a standard form factor

Ovation I/O module, which will permit Ovation to communicate with HART

devices.

The HART Analog Input Module is applicable for CE Mark confifigured systems.

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