Gems Sensors & Controls 47 Operating Manual
Sheet P/N 7800811
Warrick® Series 47
Intrinsically Safe Sensing Circuit
Installation and Operation Bulletin
Table of Contents
Page 2 Installation Instructions: Safe Sensing Circuits
- Mounting Location
- Wiring: General Information
- Grounding
Page 3 Technical Information
- Specifications
- Ordering Information
Form 470
Rev. G
Page 4 Control Diagram
- A.C. Supply
- Grounding
- System Fault Contacts
Page 5 Operation Instructions
- Indicator Contacts
- Test Terminals
- Silence Terminals
- Probe Connections
- Auxiliary Contact Board
Page 6 Operation Instructions
Page 7 Operation Instructions
- Adjusting the Set Point Position
- Adjusting the Set Point Position: SVP-2 Sensor Only
- Troubleshooting Guide
Page 8 Technical Information
- Module Replacement
Installation: Intrinsically Safe Sensing Circuits
This bulletin should be used by experienced personnel as a guide to the installation of Series 47. Selection or
installation of equipment should always be accompanied by competent technical assistance. We encourage
you to contact Gems Sensors or its local representative if further information is required.
Important
Before proceeding to install and wire Series 47 controls,
read and thoroughly understand these instructions.
When installed according to these instructions, this device provides intrinsically safe sensing circuits for interface into Class I, II and III, Division 1, Groups C, D, E, F and G. Electrical equipment connected to associated
apparatus should not exceed maximum ratings marked on product.
*** Warning: To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing.
Mounting Location
The control must be situated in a non-hazardous area where an explosive atmosphere will not exist at any time,
unless it is mounted in a suitable U.L. approved explosion-proof enclosure with suitable U.L. approved explosion-proof seals.
Wiring: General Information
1. Intrinsically safe wiring must be kept separate from non-intrinsically safe wiring.
2. Intrinsically safe and non-intrinsically safe wiring may occupy the same enclosure or raceway if they are at
least 2 inches (50mm) apart and separately tied down. Inside panels, field wiring terminals for intrinsically
safe circuits must be separated by at least 2 inches (50 mm) from non-intrinsically safe terminals.
3. Wire the control device(s) to the Series 47 relay as shown in figure 1. A separate rigid metallic conduit
should be used to enclose the conductors of the intrinsically safe control circuit.
4. An approved seal should be used at the point where the intrinsically safe control circuit wiring enters the
hazardous area.
For intrinsically safe output wiring, use #14 or #16 AWG type MTW or THHN wire. By using these wire types in
conjunction with the following distance recommendations, you will not exceed the maximum capacitance for
field wiring. Use Table 1 as a guide for maximum wire runs.
Model No.
47C1XXXX
47D1XXXX
47E1XXXX
Sensitivity Distance Per Channel
26 K
50 K
100 K
Table 1
2-Wire Sensor - 1,500 Ft.
3-Wire Sensor - 750 Ft.
2-Wire Sensor - 900 Ft.
3-Wire Sensor - 450 Ft.
2-Wire Sensor - 400 Ft.
3-Wire Sensor - 200 Ft.
Grounding
The four mounting holes on the Series 47 provide an electrical connection for earth grounding between the
control’s internal solid state circuitry and the enclosure chassis. To insure proper grounding, use only metal
screws and lock washers when mounting this control. Terminal G on the supply line/load side terminal strip
is a redundant system ground terminal and must be connected to earth ground buss of the control’s AC
supply line feeder.
Notes
1. Intrinsically safe terminals can be connected to any non-energy generating or storing switch device such as a
pushbutton, limit or float type switch or any Warrick electrode and fitting assembly.
2. To prevent electrical shock from supply line/load side powered connections, the Series 47 should be mounted in a
tool accessible enclosure of proper NEMA rated integrity.
3. For U.L. 913 Listed panels, a metallic partition may be necessary to provide adequate spacing between nonintrinsically safe and intrinsically safe wiring and /or terminals.
4. For additional guidance on “Hazardous Location Installation” and “Intrinsically Safe Devices”, consult ANSI/ISA
2
standard RP 12-6 or NEC articles 500-516.
Technical Information
Specifications
Master Fault Contact for Indication of System Alarm: (Terminals 7,8 & 9)
Contact Design: SPDT (1 form C): one normally open (N.O.) and one normally closed (N.C.),
non -powered contacts Contact Ratings for each channel.
Load Contact Ratings: 5A @ 120/240 VAC resistive and 30 VDC resistive, 1/10 Hp @ 120/240 VAC.
Indicator Contacts for Warnings, and Normal Lights: (Terminals C and 1-5)
Load Contact Ratings: 25mA @ 120 VAC
Indicator Contact for Bell: (Terminals C & 6)
Bell Contact Ratings: 5A @ 120/240 VAC and 30 VDC resistive, 1/10 Hp
Optional Auxiliary Contacts for Indication of Individual Channel Alarm:
Contact Design: SPDT (1 form C): one normally open (N.O.) and one normally closed (N.C.),
non-powered contacts Contact Ratings for each channel
Load Contact Ratings: 5A @ 120/240 VAC resistive and 30 VDC resistive, 1/10 Hp @ 120/240 VAC.
Contact Life: Mechanical - 10 million operations. Electrical - 1,000,000 operations minimum at rated
load.
Electronics Module: Solid state components epoxy encapsulated in a black nylon shell
Sensitivity: Models operate from 0-100,000 ohms maximum specific resistance
Temperature: -40° to 150° F Ambient.
Primary Voltage: 120 VAC models + 10% - 15%, 50/60 Hz.
Supply Current: Relays energized - 30mA @ 120 VAC
Secondary Circuit: 12 VAC RMS voltage on probes, 6ma current RMS.
Terminals: Standard Form C removable terminal strip containing a size 4 pan head screw with a clamping
plate. Will accept up to one #14 AWG wires per terminal. Use copper (60°-77° C) wire only. Torque to 20
inch pounds.
Listings: U.L. Intrinsically Safe (UL 913)
Ordering Information
47 X 1 X XXX
SENSITIVITY
C
D
E
Auxillary Contact Board- PB-0335
26K
50K
100K
INPUT VOLTAGE
1
120 VAC
AUX CONTACTS
AUX CONTACTS
A
NO AUX CONTACTS
B
NUMBER OF CHANNELS
ONE CHANNEL
3A1
TWO CHANNELS
2A2
THREE CHANNELS
1A3
FOUR CHANNELS
0A4
3
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