Chapter 12 High-Level Input Channel; Features; Wiring; Channel Connector - Honeywell SC Series Installation Instructions Manual

Signal Conditioning, Self Calibrating Digital Indicators
Chapter 12 High-Level Input
Channel

12.1 Features

The High-Level Input channel provides a dc supply voltage to
and accepts voltage or current signals from amplified transduc-
ers such as pressure transducers, load cells and dc-dc LVDTs.
These signals are digitized, converted into engineering units, and
placed into the track, peak and valley data values of the channel.
Setup and calibration of the channel is made manually through
the SETUP menu mode. Signature Calibration is not available
with amplified transducers.
The analog-to-digital converter input circuit features adjustable
digital, low-pass filtering, 12- to 18-bit resolution (depending on
the filter setting) and has several different input ranges. These
many ranges allow ±50,000 count resolution (at the slowest filter
setting) across a wide variety of input ranges.
A combination of SETUP menu items and hardware jumpers are
used to configure the excitation supply output voltage (+28 Vdc,
±15 Vdc, +15 Vdc or +12 Vdc), the input type (voltage or current)
and input reference (differential or single ended).
Two methods of calibrating the High-Level Input channel to the
transducer are available: known-load calibration and shunt cali-
bration. The benefits of each are discussed in "CALIBRATION TYPE
Menu Item" on page 59.
Two rear panel control inputs can be field-configured for such
functions as remote tare, disabling peak/valley detection and
clearing the peak/valley values. A voltage or current digital-to-
analog output is also provided.
48 Honeywell Sensing and Control

12.2 Wiring

12.2.1 Channel Connector

Connect the amplified transducer, in-line amplifier or dc-dc LVDT
to a High-Level Input channel by wiring it to the 12-pin connec-
tor of that channel. The Customer Information Sheet that shipped
with the instrument describes which cards are installed in each
channel. The pin-out for this connector is shown on the following
table.

Table 12-1: High-Level Input Channel Pin Connections

Pin Label Function
1 (top) +EXC (+)Excitation
2 SHUNT1 Shunt Cal Relay
3 -SHUNT2 Shunt Cal Relay
4 -EXC (-)Excitation
5 +SIG (+)Signal
6 -SIG (-)Signal
7 +OUT Analog Output
8 -OUT Analog Return
9 N/C No Connection
10 DGND Digital Ground
11 AUX1 Auxiliary Function 1 (connect to
pin 10 to activate)
12 AUX2 Auxiliary Function 2 (connect to
(bot- pin 10 to activate)
tom)
The Analog Output and Analog Return pins are electrically iso-
lated from all other pins on the instrument.
CAUTION
Identify the amplified transducer or in-line amplifier accord-
ing to the Option Code or model name as shown on its serial
number tag. Use this information to select the correct wiring
diagram on the following pages. Incorrect wiring can damage
both the transducer and the instrument.
Failure to comply with these instructions may result in
product damage.
008-0608-00
Rev. G,
Ref.
Pin
10
3
2
10
10
10
8
-
-
-
10
10