Minarik PCM3 Manuale utente
USER’S MANUAL
PROCESS CONTROL
MODULE PCM3
Copyright 2002 by
Minarik Corporation
All rights reserved. No part of this manual may be reproduced or transmitted in
any form without written permission from Minarik Corporation. The information
and technical data in this manual are subject to change without notice. Minarik
Corporation and its Divisions make no warranty of any kind with respect to this
material, including, but not limited to, the implied warranties of its merchantability
and fitness for a given purpose. Minarik Corporation and its Divisions assume no
responsibility for any errors that may appear in this manual and make no
commitment to update or to keep current the information in this manual. MVD061402
Printed in the United States of America.
i
Safety Warnings
• This symbol denotes an important safety tip or warning.
PLEASE READ THESE INSTRUCTIONS CAREFULLY before
performing any of the procedures contained in this manual.
• DO NOT INSTALL, REMOVE, OR REWIRE THIS EQUIPMENT
WITH POWER APPLIED. Have a qualified electrical
maintenance technician install, adjust, and service this
equipment. Follow the National Electrical Code (NEC) and all
other applicable electrical and safety codes, including the
provisions of the Occupational Safety and Health Act (OSHA)
when installing equipment.
• Reduce the chance of an electrical fire, shock, or explosion by
proper grounding, over current protection, thermal protection, and
enclosure. Follow sound maintenance procedures.
S
H
OCK
HAZARD
AV
O
I
D
HEAT
KEE
DR
O
I
D
A
TI
ON
Although this process control module isolates a voltage or
current signal, its internal circuit potentials are at 115 VAC
or 230 VAC above earth ground. Avoid direct contact with
the printed circuit board or with circuit elements to prevent
the risk of serious injury or fatality. Use a non-metallic
screwdriver for adjusting the calibration trimpots.
ii
Contents
Safety Warnings i
Specifications 1
Dimensions 2
Introduction 3
Installation 4
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Shielding guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Screw terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
AC line connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Voltage follower connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Current follower connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Leader signal generator connections . . . . . . . . . . . . . . . . . . . . .12
Output Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Armature Voltage Follower . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Multiple Follower Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Voltage/Current Selector Slide Switch . . . . . . . . . . . . . . . . . . . .20
Calibration 21
Voltage Signal Follower Calibration . . . . . . . . . . . . . . . . . . . . . .22
Manual Leader Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Current Signal Follower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
1-5 mA DC current signal input range: . . . . . . . . . . . . . . . . . . . . . . . .24
4-20 mA DC current signal input range: . . . . . . . . . . . . . . . . . . . . . . .25
10-50 mA DC current signal input range: . . . . . . . . . . . . . . . . . . . . . .26
Troubleshooting 28
Certificate of Compliance 31
Unconditional Warranty inside back cover
iii
Figure 1. Process Control Module Dimensions . . . . . . . . . . . . . . . . . .2
Figure 2. Screw Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 3. 115VAC Power Connection . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 4. 230VAC Power Connection . . . . . . . . . . . . . . . . . . . . . . . . .9
Figure 5. Connection – Following an External Voltage Signal . . . . . . .10
Figure 6. Connection – Following an External Current Signal . . . . . . .11
Figure 7. Connection – Unidirectional Manual Leader Signal Source .13
Figure 8. Connection – Output Voltage . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 9. Armature Voltage Follower Connections . . . . . . . . . . . . . . .17
Figure 10. Multiple Follower Motors Connection . . . . . . . . . . . . . . . .19
Figure 11. Voltage/Current Selectro Slide Switch . . . . . . . . . . . . . . . .20
Figure 12. Calibration Trimpot Layout . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 13. Shunt Resistor Installation . . . . . . . . . . . . . . . . . . . . . . . .27
iv
Illustrations
1
Specifications
Power Requirements
Line input 115VAC/230 VAC, 50/60 Hz, single phase
Input Signal Ranges (input circuit is isolated)
Voltage signal, narrow range 0 to +25 VDC
Voltage signal, mid range 0 to +120 VDC
Voltage signal, wide range 0 to +550 VDC
Current signal 1–5 mADC, 4–20 mADC, 10–50 mADC
Input Impedance
Voltage signal >25K ohms
Current signal, 1–5 mADC 1K ohms
Current signal, 4–20 mADC 235 ohms
Current signal, 10–50 mADC 100 ohms
Output
Impedance 800 ohms
Voltage range, max 0 to +10 VDC
Linearity 0.1%
Operating Temperature Range 0 – 50 °C
2
Dimensions
CU
RREN
T
5
4
3
2
1
6
7
8
9
10
TP
IC
1
IC2
C
1
C2
C3
C4
C5
T1
P1
TB1
OC
1
MAXIMUM
OU
TP
UT
MINIMUM
OU
TP
UT
P2
P
3
MINARIK
ELE
C
TRI
C
S
I
G
NA
L
ISO
LAT
O
R
R1
R2
R
3
REF
OUT
2.700 [69]
2.150 [55]
4.225 [107]
4.825 [123]
MOUNTING HOLE (4 EA)
0.146 [4] DIAMETER 0.250 [6]
1.280 [33]
Figure 1. Process Control Module Dimensions
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Minarik model PCM3 signal isolators produce a floating DC voltage
signal proportional to a variable DC current or voltage signal input.
It also can generate the floating DC voltage signal output controlled
by an external potentiometer. The output signal fed to a speed
controller allows a motor to be driven automatically at a speed
proportional to the signal, i.e., to follow the signal. The maximum
PCM3 output voltage is 10 VDC.
The PCM3 DC voltage output must be trimmed to not exceed the
reference voltage, i.e., the normal voltage drop across the speed
adjust potentiometer of the motor speed controller. For Minarik
MM20000 series controls, the reference voltage is approximately
3.5 VDC. Putting higher DC voltage into the control speed adjust
circuit will not produce correspondingly higher motor speeds. Such
an error can seriously degrade the linearity between the process
signal level and motor speed.
This manual contains specifications, installation procedures,
connections, and calibration procedures for the process control
module, model PCM3. Refer to your variable speed drive user’s
manual for additional installation, operation, and troubleshooting
procedures.
3
Introduction
4
Mounting
•PCM3 components are sensitive to electrostatic fields. Avoid
contact with the circuit board directly.
•Protect the PCM3 from dirt, moisture, and accidental contact.
•Provide sufficient room for access to the terminal block.
•Mount the PCM3 away from other heat sources. Operate within
the specified ambient operating temperature range. The
operating temperature range for the PCM3 is 0°C through 50°C.
•Prevent loose connections by avoiding excessive vibration of the
process control module board.
•Mount the PCM3 in either a horizontal or vertical plane. The
PCM3 is mounted using 4 ea. 0.25 inch [6mm] standoffs.
See Figure 1, page 2 for the physical locations of these
standoffs. Use #8 panhead screws to fasten the standoffs to the
mounting surface.
Installation
Warning
Do not install, rewire, or remove this control with input power
applied. Doing so may cause fire or serious injury. Make
sure you read and understand the Safety Warnings on page
i before attempting installation.
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