Asahi/America 94 Series, Инструкция по установке, эксплуатации и обслуживанию

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ASAHI/AMERICA, INC 655 ANDOVER STREET LAWRENCE, MA. 01843 TELEPHONE 800-343-3618
File: assembly/manuals/Series 94 Gen II A/C Modulating Svc Manual Rev. A 11/19/19
Page 3 of 27
Troubleshooting ............................................................................................... 24
Maintenance ....................................................................................................... 27
Spare Parts ..................................................................................................... 27
DHC-100 Introduction
The DHC-100 is a high performance digital positioner intended to control AC
actuators, providing 450 points of resolution with quarter turn actuators ranging
from 2 sec to 120 sec and rated for 25% duty or more. The DHC-100 has many
automatic advanced features that will enhance any actuator while making it easy
to install and set up.
The simple three button control is used to configure all parameters the unit needs
for a wide variety of applications, and allows the
open and closed positions to be
easily set for direct or reversing acting without any rewiring. The unit can be
configured for various command types (4-20mA, 1-5V, 0-5V, 0-10V, or a digital
command) and its default operation upon loss of command.
Various option modules are easily plugged into the unit, providing other features
such as a position feedback signal (current or voltage), auxiliary switches, fault
relay contact, or digital communications. A wide range of data is accessible
through a digital communications module, providing additional control or
information.
The unit is of single solid construction and is easily mounted with two screws.
FEATURES

Positions to ±0.1

with quarter-turn actuators ranging from 2 sec to 90 sec.

Three button control provides easy setup and eliminates the need for
instrumentation.

Polarity Detection feature allows direct or reverse acting operation without
re-wiring.

Electronic Brake feature can eliminate need for a mechanical brake in
many applications, and extends mechanical brake life when used.

Stall Detection feature protects actuator motor from a stall condition.

Automatic Duty Cycle Control feature prevents shutdown of a process
due to a thermal overload of the actuator motor, and allows actuators rated
for 25% duty or more to be safely used.

Operating temperature range of 0 to 60
