Table of Contents
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Table of Contents
Introduction..........................................................................
Description...........................................................................
Specifications.......................................................................
Installation............................................................................
Calibration............................................................................
General Maintenance...........................................................
List of Drawings
Electrical Connections (4501-542).......................................
Calibration Connections (4501-543)....................................
Configuration Jumper Location (4501-545)..........................
Dimensions: DIN Rail Mounting (4501-540)........................
Interposing Relay Connections (4501-541)..........................
AC Sensor Connections (4501-546)....................................
IMPORTANT SAFETY CONSIDERATIONS
It is very important for the user to consider the possible adverse
effects of power, wiring, component, sensor, or software failures in
designing any type of control or monitoring system. This is
especially important where economic property loss or human life is
involved. It is important that the user employ satisfactory overall
system design. It is agreed between the Buyer and Acromag, that
this is the Buyer's responsibility.
Acromag, Inc.
30765 South Wixom Road
P.O. Box 437
Wixom, Michigan 48393-7037, USA
Copyright 1995 Acromag, Inc., Printed in the USA.
Data and specifications are subject to change without notice.
8500-546-A95H000
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Tel: (248) 624-1541
FAX: (248) 624-9234
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Model 461A AC-Powered Alarm
INTRODUCTION:
These instructions cover the model types listed in Table 1
below. Supplementary sheets are attached for units with special
options or features.
Table 1: A. Model Number Format:
461A-Input-Output-Power-Mounting-Cert-Calib
B. Typical Model Number: 461A-V5-SMRN-1-DIN-NCR
Series
Input
Output
461A
-V1
-SMRN
-V5
-DMRN
-V0
-V50
-V100
Notes (Table 1):
1. The Alarm can be ordered with or without the factory calibration
("-C") option. Consult the selection and ordering guide for more
information. Any customer-specified calibration information will
be included on a separate calibration label on the unit.
2. Consult the factory for current information on agency (e.g.
Canadian Standards Association, etc.) approvals.
DESCRIPTION:
The Series 461A is an AC-powered, DIN-rail mounted alarm
family that accepts either a process current, or DC voltage input
signal, and provides single or dual alarm output relay contacts. The
Series 461A complements an entire family of Acromag flat-pack,
DIN-rail transmitters, alarms, and isolators, each designed to be
used as functional components that provide the user with a modular
solution for a wide range of field applications. The safe, compact,
rugged, and reliable design of this alarm allows it to be utilized in
either control room or field locations.
The electromechanical relay output provides one SPDT (Form
C) relay contact output (single alarm), or two SPDT (Form C) relay
contact outputs (dual alarm). The unit can be configured as a HIGH
or LOW single alarm, or a HIGH/HIGH, HIGH/LOW, LOW/HIGH or
LOW/LOW dual alarm. The operating mode of each relay can be
set to Failsafe (Normally Energized), or Non-Failsafe (Normally De-
Energized). The term 'Failsafe' refers to the condition that the relay
is energized during normal conditions, and de-energized upon alarm
or power loss to the unit. The Non-Failsafe mode of operation is
primarly used for simple control applications and acts opposite the
Failsafe mode--that is, the relay is energized during alarm
conditions.
Each channel has one pair of LED's (Green and Red) that
provide a visual indication of the alarm condition on the front of the
unit. When the Green LED is ON, it indicates a Normal condition,
and when the Red LED is ON, it indicates an Alarm condition. This
applies to both the Failsafe or Non-Failsafe operating mode. Thus,
line power status is simply indicated by an illuminated LED.
User's Manual: Series 461A
Pwr
Mtg
Cert.
Calib.
-1
-DIN
-NCR
Blank
-2
-C
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Table of Contents
Summary of Contents for Acromag 461A Series
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Page 1: Table Of Contents
It is important that the user employ satisfactory overall Series 461A complements an entire family of Acromag flat-pack, system design. It is agreed between the Buyer and Acromag, that DIN-rail transmitters, alarms, and isolators, each designed to be this is the Buyer's responsibility. -
Page 2: Specifications
-V100: 0 to 100V DC with 1MΩ minimum input impedance. available for 115V AC, or 230V AC power (for DC power, see the Acromag Series 361A alarms). The versatile DIN rail mount can IMPORTANT: For the -V1 and -V5 input ranges, the 4-20mA accomodate a variety of mounting applications. - Page 3 Series 461A User's Manual Single/Dual Alarm ___________________________________________________________________________________________ Input Overload: The AC current sensor can withstand overloads -SMRN: Single Alarm (S), one Single-Pole, Double-Throw as follows: (SPDT), Form C, electromagmetic (MR), dry-contact sealed relay. Non-Latching (N) • 20 times full-scale for 0.01 second -DMRN: Dual Alarm (D), two Single-Pole, Double Throw •...
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Page 4: Installation
Series 461A User's Manual Single/Dual Alarm ___________________________________________________________________________________________ INSTALLATION: Response Time: A built-in fixed time delay of 100 milliseconds typical. That is, the relay will transfer ≤100 milliseconds after the input signal exceeds the setpoint. This delay helps prevent The alarm is packaged in a general purpose type of enclosure. false alarming due to transient interference. -
Page 5: Calibration
The plastic housing has no screws, it "snaps" together. A flat- mode voltages up to 250V AC, or 354V DC, off ground, on a head screwdriver (Acromag 5021-216 or equivalent) is needed to pry continuous basis. the housing apart as described in the following steps. -
Page 6: General Maintenance
Acromag 2. Adjust the input source for 12.000mA DC (value desired for for repair, since Acromag uses tested and burned-in parts, and in alarm setting in this example). some cases, parts that have been selected for characteristics 3.