Emerson ROC364 - SECTION 5 - I;O CONVERTER CARD

ROC364 Instruction Manual
5-1 I/O Converter Card Rev Jun/05
SECTION 5 – I/O CONVERTER CARD
5.1 Scope
This section describes the I/O Power Converter Card optionally available for the ROC364 Remote
Operations Controller. Topics covered include:
Section
Page
5.2 Product Description 5-1
5.3 Initial Installation and Setup 5-2
5.4 Troubleshooting and Repair 5-3
5.5 I/O Converter Card Specification 5-4
5.2 Product Description
The I/O Power Converter Card, which mounts on the MCU board, is used when the ROC is powered
from a 12-volt power supply and 24 volts dc is required to power field transmitters (Table 5-1). A
maximum of twenty five 4-to-20 milliamp loops can be accommodated by the card. If more than twenty
five current loops need to be accommodated, a separate 24-volt dc power supply must be used.
Figure 5-1 shows the I/O converter card.
Q1
L1
C3
RP1
Q
2
RP2
U2
CR1
R3
R6
R4
CR2
C2
C4
U1
1
P1
DOC0124A
Figure 5-1. I/O Converter Card
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NOTE: Use a standard screwdriver with a slotted (flat bladed) 1/8-inch width tip when wiring all
terminal blocks.