Typical Application - CAL Controls 9500P Manual De Usuario

UL61010-1 Edition 3
Compliance shall not be impaired when fitted to the final installation.
Designed to offer a minimum of Basic Insulation only.
The body responsible for the installation is to ensure that supplementary insulation suitable for Installation
Category II or III is achieved when fully installed.
To avoid possible hazards, accessible conductive parts of the final installation should be protectively earthed in
accordance with UL61010-1 Edition 3 for Class 1 Equipment.
Output wiring should be within a Protectively Earthed cabinet.
*
Sensor sheaths should be bonded to protective earth or not be accessible.
Live parts should not be accessible without the use of a tool.
When fitted to the final installation, an IEC APPROVED disconnecting device should be used to disconnect
both LINE and NEUTRAL conductors simultaneously.
A clear instruction shall be provided not to position the equipment so that it is difficult to operate the
disconnecting device.
*
EMC Immunity
EMC immunity may be improved by fitting large Ferrite cores around the sensor cables at the point where they
enter the cabinet and an earth bond is recommended.

TYPICAL APPLICATION

In this example the load temperature is monitored by a temperature transducer/transmitter which provides a 4–
20mA input signal to the controller . The 4–20mA output has been allocated to SP1 to drive an SCR power
controller providing a phase angle controlled output to the heater.
1A time lag type to IEC127. UL rating 250Vac.
F1 Fuse:
High Rupture Capacity (HRC) Suitable for maximum rated load current.
F2 Fuse:
IEC/UL Approved disconnecting device.
S1 Switch:
20
TYPICAL APPLICATION
Analogue
power
controller
(+) (–)
17 18 19 20
4–20mA
Model
9 5 B 1 1 P B – – –
INPUT
(–) (+)
1 2 3 4
4–20mA
T ransducer
L
Mains
N
S1
Heater
User configurable
alarms
21 22 23 24
L N
5 6 7 8
F1
F2