ROC364 Instruction Manual
5-2
I/O Converter Card
Rev Jun/05
Table 5-1. I/O Converter Card Requirements
MCU Input
Voltage (V dc)
Are 4 to 20 MA
Loops Used?
Is a Converter
Needed?
12 No No
12 Yes Yes
24 No No
24 Yes No
5.3 Initial Installation and Setup
The following procedure assumes a first-time installation. For units currently in service, certain
precautions must be taken to assure that data is not lost and equipment is not damaged. Refer to 5.4.1,
Replacing an I/O Converter Card, on page 5-3.
When repairing units in a hazardous area, change components only in an area known to be non-
hazardous.
There is a possibility of losing the ROC configuration and historical data held in RAM while
performing the following procedure. As a precaution, save the current configuration and
historical data to permanent memory as instructed in Section 2, RAM Backup Procedure
During this procedure, all power is removed from the ROC and devices powered by the ROC.
Ensure all connected input devices, output devices, and processes remain in a safe state when
power is removed from the ROC and when power is restored to the ROC.
To install the converter card, proceed as follows:
1.
Remove power from the ROC.
2.
Remove the FlashPAC.
3.
Remove the four screws securing the MCU upper cover in place, and then lift off the cover.
4.
Locate connector J1 on the MCU board. If a shorting plug is plugged into J1, remove it.
5.
Grasp the I/O converter card by its edges and position the card connector over connector J1 on
the MCU board. Push down firmly, but gently, to seat the card into the connector.
6.
Secure the card in place using three 6-32 screws.
7.
Reinstall the FlashPAC.
8.
Reinstall the MCU cover.
9.
Apply power to the ROC.