PEMTECH PT900-16FG Manuale utente
MODEL PT900-16FG
16 CHANNEL
GAS MONITOR & CONTROLLER
Operator’s
Manual
Revision 2.0
March 2001
Pem-Tech, Inc.
Houston, Texas
U.S.A.
2
NOTICE
PEM-TECH INCORPORATED SHALL NOT BE LIABLE FOR
TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS MADE
HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING FROM THE FURNISHING,
PERFORMANCE, OR USE OF THIS MATERIAL.
LIMITED WARRANTY
Pem-Tech, Incorporated warrants all the equipment to be free from defects in
workmanship and material. The products will operate in conformance with the
published specifications when subjected to intended and proper usage for the
period of one (1) year from the date of shipment.
The warranty provides only the benefits specified and does not cover defects
which result from acts beyond the control of PEM-TECH including, but not
limited to: damage by accident, negligence, tampering, or failure to operate in
accordance with the procedures outlined in the Operations Manual. PEM-
TECH’s liability under no circumstances will exceed replacement of the unit
claimed to be defective.
Tampering with the equipment and altering it for uses other than the intended
use or replacement of parts not supplied by the company, shall immediately
void and cancel all the warranties with respect to the affected products.
The warranties specified herein are in lieu of any and all other warranties,
express or implied. In no event, whether as a result of breach of warranty or
alleged negligence, shall PEM-TECH be liable for special or consequential
damages, including, but not limited to, loss of profits or revenue, loss of
equipment or down time costs.
3
SERVICE POLICY
Pem-Tech has service facility at the factory. For all the repairs contact at our toll
free number 1-800-379-3894 or visit our website www.pem-tech.com
For all repairs call us for a Return Material Authorization number (RMA).
Inform us briefly the nature of the problem and obtain shipping address.
Properly pack the equipment before shipping. Also include your complete
shipping address and contact name and phone number.
For non-warranty repairs you must provide the limit to repair costs. State if a
quote for repair cost is required before you can authorize the repair cost. For this
an additional charge may be applicable.
NOTE:
1. For all the repairs under warranty, serial number must be legible on the items
being repaired.
2. Shipping point is FOB Houston.
4
TABLE OF CONTENTS
Specifications 5
Specifications for PT900-16FG Rack assembly 5
Specifications for Model PT950-B Control monitor 6
Overview 7
Programmable Relays 7
Figure 1. PT950-B Control module Front Panel diagram 8
Installation and Startup 9
Figure 2. PT900-16FG Enclosure dimension 9
Figure 3. System Overview drawing, 10
User termination, control modules in
Rack assembly
AC or DC power Input 11
Connecting sensors to monitor 11
Alarm wiring 11
Figure 4. Sensor and alarm wiring diagram 12
Figure 5. Wiring auxiliary relay board for common 13
Alarm contacts
Startup 14
Apply Power 14
Normal Operation and alarms
Normal Operation 15
Alarms 15
Alarm Reset 15
Alarm Bypass 15
Programming Alarms 16
Programming Alarm Levels 17
Setting alarms as Latching or Non-Latching 17
Setting alarm contacts as Normally Open or 18
Normally Closed
Figure 6. PT950-B Control Monitor circuit diagram 19
Malfunction Condition 20
Parts List 21
5
SPECIFICATIONS
For PT900-16 Rack Assembly with Power Supply
MOUNTING: Wall or Panel Mount
ENCLOSURE: NEMA 4X Fiberglass Enclosure with clear
window
DIMENSIONS: 32”H x 24.5”W x 10”D
WEIGHT: 52 Lbs.
OPERATING -40 °F to +170 °F.
TEMPERATURE
POWER INPUT: 110-220 VAC or 24-28 VDC
HUMIDITY: 0 to 100% non condensing
AUXILIARY ALARM 4 Common alarm relays
RELAYS Form “C” type rated 10Amps
TERMINATIONS Terminal blocks for sensor and alarm
connections for wire size 16-22 AWG
ALARM RESET Master alarm Reset switch to Reset or
SWITCH Acknowledge alarms on all control modules
6
SPECIFICATIONS
For PT950-B Control Module
Display Range: 0 to 99 for Toxic and Combustibles
0 to 25.0 % for Oxygen deficiency ( 3 Digit
Display)
Others depend on the range of the Sensor.
Input Signal: 4-20mA (Optional 1-5 VDC)
Analog Output: Linear 4-20mA output. < 1.5mA when remote
sensor in malfunction.
Maximum of 350 Ohms loop resistance.
Relay Ratings: 4 each Form “C” type relay contacts
Rated 5 Amps each
Low, High, High-High, and Malfunction
Field programmable alarm levels, Latching or
non-latching, Normally open or Normally
Closed contact
Visual Indicators: 4 Bright LEDs on the front panel to indicate
alarm status. Amber LED for Low Alarm
Red LEDs for High and High-High and
Malfunction Alarm
Power Input: 24 VDC power input. Power is supplied
to remote sensor & transmitter through a 2
Amp miniature fuse
Power Consumption: < 1.2 Watt normal operation for each control
module. Max of 2.4 watt with all relays active.
7
OVERVIEW
Pem-Tech model PT950-B is a microprocessor based single channel
monitor that utilizes the latest digital design techniques in
instrumentation. The monitor uses an 8-bit high speed RISC processor
with a highly accurate analog to digital logic. The controller module
receives signals from remote gas transmitters, displays the gas
concentration, generates 4-20mA analog output for recorders and relay
outputs for alarm warning devices. Each control module uses 24VDC
power and supplies power to the remote gas transmitter connected.
Standard features are:
•Displays current gas concentration on two (2) Digit Bright LED
display ( 3 digits display for Oxygen deficiency )
•Provides a 4-20mA output.
•Low, High, & High-High fully programmable alarm relay contacts.
•Alarms programmable via switches on the front panel
•Sensor Malfunction relay contact.
•Visual alarm indicators on the front panel.
•Alarm RESET and BYPASS switch.
•RS485 Serial Communication for Remote data display
•Master Alarm Reset on the main rack assembly to Reset Alarms.
Programmable Relays
Each control module has three (3) programmable relays for Low, High,
and High-High alarms. The alarm relay set points can be programmed
via pushbutton switch provided on the front panel. On the main
termination board of PT900-16 rack system common alarm terminals are
provided for each of the control module. A common terminal is also
provided for sensor malfunction (or fault). This terminals are common to
the alarm relays on all the control modules in the system. The alarm
terminals are connected to the Auxiliary Relay board assembly to provide
10Amps dry contacts for warning lights and sirens.
For further details refer to section on Programming alarm Relays later in
this manual.
8
ALARMS
NORMAL
BYPASS
PEM−TECH, INC.
LOW
HIGH
HI−HI
MALF
MODEL PT 950
MONITOR
HOUSTON, TEXAS
Di
g
ital Displa
y
Visual Alarm LED indicators
Alarm B
yp
ass Switch
Pushbutton switch
(Alarm Reset & Adjust)
Captive Screw
Handle
Figure 1. PT950-B Control Module
9
INSTALLATION AND START UP
Model PT950-B Control Module is suitable to mount in any PT900 Series
Rack assembly with card guides for main circuit board mounting. On the
front panel a captive screw is provided to secure the control module to the
rack. Do not use excessive force to tighten the screw. Also a handle is
provided to facilitate for insertion and removal of the module from the
rack assembly.
PT900-16 FG enclosure must be installed in a safe area. Figure 2 shows the
mounting holes for the fiberglass enclosure.
Figure 2. Dimensions for PT900 Series Fiberglass enclosure
9"9"
24.5"
DIA = 0.44"
32.0 33.0
10
Figure 3. User termination – PT900-16FG
16 Each PT950 series control modules in Fiberglass enclosure
DRAWING NO. REV.
SCALE SHEET
PEM−TECH INC.
APPROVALS DATE
DRAWN
CHECKED
ISSUED
+
E
−
EXT RESET
L
N
G
AC INPUT
FROM
PWR SUPPLY
POS
NEG
RESET
ALARMS
POWER SUPPLY
PANEL SCREWS
MASTER AL ARM RESET SWITCH
DRY CONTACT SWITCH
FOR ALARM RESET & BYPASS
117−220 VAC INPUT
FOR ONBOARD
POWER SUPPLY
24 VDC FROM
ON BOARD AC/DC
POWER SUPPLY
+ ==> SENSOR SUPPLY
− ==> SENSOR GND
E ==> SENSOR SIGNAL IN
DRY ALARM
RELAY CONTACTS
SELECT LATCHING OR
NON−LATCHING ON
CONTROL MODULE
B2000108 1.0
1OF1
NONE
USERTERMINATION−MODELPT900−16FG
16EACHPT950BCONTROLMODULES
INFIBERGLASSENCLOSURE
3/10/99
1
0
POWER ON/OFF
CH1
−
E
+
CH9
E
−
CH10
+
E
−
CH2
+
E
−
CH11
+
E
−
CH3
+
E
−
CH12
+
E
−
CH4
+
E
−
CH13
+
E
−
CH5
+
E
−
CH14
+
E
−
CH6
+
E
−
CH15
+
E
−
CH7
+
E
−
CH16
+
E
−
CH8
+
1
2
3
4
7
8
6
5
11
12
10
9
15
16
14
13
COM
OUT
LOW
OUT
COM
HIGH
OUT
COM
HI−HI
OUT
COM
MALF
AUX. RELAY
POWER
POS
NEG
RS485
4−20mA OUTPUT
+
−
16 REMOTE SENSOR CONNECTION
FROM CONTROL MODULES
ALARMS
MOUNTED BEHIND FRONT PANEL
3 CONDUCTOR CABLE
24VDC POWER TO
AUX RELAY BD ASSEMBLY
RS485 COMMUNICATION PORT
FOR REMOTE ANNUNCI ATOR
Indice
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