c on ne ct i n g t h e p r oc e s s

AS-i general purpose cable

Nonincendive

Field Wiring

& Associated

Apparatus

AS-i cable (PLTC/ITC)

AS-i general purpose cable

Nonincendive Field Wiring

& Associated Apparatus

AS-i cable

(PLTC/ITC) with strut support

Class I, Division 2

AS-i cable (PLTC/ITC) with messenger wire

Control System

Network

120/240 VAC

AS-i cable

(PLTC/ITC)

Class I, Division 1

Rigid metal conduit

Metal clad flexible conduit

JM-3: Potted leads recommended to enable removal of VCT while bus energized

Additional

AS-i length

AS-i cable (PLTC/ITC)

AS-i cable (PLTC/ITC) with messenger wire

Liquidtight flexible conduit

AS-i Cable

(PLTC/ITC) with strut support

AS-i cable

(PLTC/ITC)with strut support

Repeater/

Power Conditioner

120/240 VAC

Level Switches

Rigid metal conduit

30 VDC (PLTC/ITC), no AS-i signal

(distance not included in total AS-i network length)

Protection concepts shown are for illustration purposes. Final acceptance of installation including wiring practices is subject to the authority having jurisdiction.

NEC 500 Wiring Guidelines

Nonincendive Field Wiring and Associated Apparatus

Class I & II, Division 2

Conduit/Cabling:

• General purpose cable

Connections:

• General purpose connectors

• Quick connectors without limitation

Field Instrument Components:

• Drop connectors limit voltage and current into spur

• Field instruments must be nonincendive field wiring apparatus rated with published parameters

(Ci, Li, Vmax, I max)

• Drop Connector and Field Instrument parameters must be coordinated as follows:

Drop Connector

Voc

Isc

<

<

Field Instrument

Vmax

Imax

• Field Instrument Ci and Li must be lower than values determined from ignition curves using 0.9 safety factor

(Ci & Li for drop cable is negligible with length under 20m)

Special Notes:

• Intrinsically safe apparatus may also be used as nonincendive field wiring apparatus

• Instrument wiring may be manipulated while energized

Explosion Proof System

Class I & II, Division 1 & 2

Conduit/Cabling:

• Rigid metal conduit or steel intermediate conduit

• MI (Mineral Insulated, Metal Sheathed) or MC

(Metal Clad) where flexibility required

• Seal-Offs for all enclosures (except those with special ratings)

Connections:

• Fittings must be explosion proof approved

Field Instruments:

• Complete apparatus must be explosion proof rated

Special Notes:

• No seal-offs are required for StoneL JM & Quartz

• Power must be removed before opening enclosures

AS-Interface Wiring Guidelines

Topology: Linear, Star, Tree or Ring (Free Topology)

Field Devices: 31 per network (62 per network with 2.1 Rev and extended addressing)

Cabling: Unshielded, untwisted 2-wire for data and power

(16 AWG is preferred)

Cable Length: 100 meters (328 ft.) per master or

300 meters (984 ft.) with two repeaters

Additional repeaters and cable length may be added in parallel with up to 2 series repeaters

Tray Cabling System

Class I & II, Division 2

Conduit/Cabling:

• Power Limited Tray Cable (PLTC) rated or Instrument

Tray Cable (ITC) rated cable used in cable tray

• PLTC or ITC used as open wiring up to 15m (50 ft) protected by angles, struts or messenger wire and secured at intervals not exceeding 1.8m (6 ft)

• PLTC or ITC used in liquidtight or MC flexible conduit

Connections:

• PLTC and ITC may be connected using compression fittings installed to avoid tensile stress at termination

• Flexible cord and quick connectors suitable provided conditions are met as described for nonincendive equipment

Field Instruments:

• Must be nonincendive equipment rated

Special Notes:

• PLTC power supplies (Class 2 approved) limited to

100 watts with maximum of 60 VDC used to limit energy into the circuit

• ITC power supplies limited to 5 amps and 150 volts rms

Nonincendive Equipment Used in

Explosion Proof & Tray Cabling Systems

Class I & II, Division 2 Only

• Seal-Offs not required

• Liquidtight conduit may be used where flexibility is required

• Field instruments must be nonincendive equipment rated

• Quick connectors may be used with the following provisions:

1. Power removed before plugging and unplugging

2. Current does not exceed 3 amps @ 120VAC

3. Cord is listed for hard usage with receptacle and plug of the locking and grounding type and does not exceed

900mm (3ft)

4. A label is attached to the receptacle warning against uplugging while energized

Special Notes:

• Enclosures may be opened while circuits are energized but wiring may not be manipulated until power is removed.

Legend

General purpose cable

PLTC/ITC in cable tray

PLTC/ITC supported by messenger wire

PLTC/ITC with strut support

Rigid metal conduit or intermediate steel conduit

Metal clad flexible conduit

Liquidtight flexible conduit

Seal fitting

Quick mini connector

Quick mini connector with clasp

Quick micro connector

(general purpose cable)

Compression fitting

S to n e L C or p or a t io n Te leph on e 2 18 -739 -57 74 w w w. s t o n e l . c o m

JM (Junction Module) Series

Clear Cover – use for Class I & II, Div. 2

Aluminum Cover – use for Class I & II,

Div. 1 and 2

• Functions include drop connectors,

I/O modules, relay modules & more

• Connections available with (3) or (4)

1/2" or 3/4" NPT. Specials available with compression fittings or quick connectors

JM-1

JM-2

JMP03_ _ _ _

Protected Drop

Connector* with clear cover

JMS0311C3

Switched Protected

Drop Connector* with clear cover

JM-3

JMS0311E3

Switched Protected

Drop Connector* with aluminum cover

JM-4

JM-5

JM-6

JMX0111C_

Repeater and Power

Conditioner with clear cover

JMM962 _C3

I/O module with pneumatic valve and clear cover

JMM9611CN

I/O module with no pneumatic valve and clear cover

Quartz Series VCTs *

Explosion proof aluminum platform with solid state dual module

Aluminum Cover – use for Class I & II,

Div. 1 and 2

Clear Cover – use for Class I & II, Div. 2

QZ-1

QZP96 [97] E _ _

Aluminum cover

& (2) NPT conduits

QZ-2

FieldBlock Series

Use for Class I & II, Div. 2

• Functions include (4) drop connectors,

I/O modules, relay modules & more

• Connections available with (6) compression fittings, quick connectors or 1/2" NPT conduits. Specials may include from (4) to

(10) connectors and different combinations

FB-1

FBS08009

Switched Protected

Drop Connector* with compression fittings

FB-2

FBP08003

Protected Drop

Connector with quick connectors

Consult StoneL’s FieldLink Bus Networking

Reference Guide for additional products and more information on models and options.

GW

Other FieldLink Products

Gateway -

General Purpose

Models include AS-I to:

• Modbus

• Profibus DP

• DeviceNet

• Ethernet TCP/IP

• Others

PS

FR

PLTC/ITC

AS-i Power Supply -

459015

Class 2 approved for use with ITC/PLTC

Class I Div. 2 wiring.

Power supply may also be located in Class I

Div. 2 areas

FieldRack Enclosures

Rated NEMA 4 & 4X for protecting nonincendive components from process environment in

Class I Div. 2 areas

AS-i Bus Cable -

463002

PLTC & ITC rated for use in Class I

Div. 2 areas. May also be installed in conduit

(Shown yellow in network above for illustration purposes)

* Drop connector provides over voltage and short circuit protection to spur and acts as barrier for nonincendive field wiring and related apparatus

Consult StoneL’s ValvePoint Catalog for additional products and more information on models and options.

Eclipse Series VCTs *

Modular direct namur mount polycarbonate platform with integral proximity sensors

ECG

ECG96 [97] _ _ _

Wired with (2) microconnectors

ECN

ECN96 [97] _ _ _

Integral terminal strip

& (2) NPT conduits

QZP96 [97] C _ _

Clear cover & (2) NPT conduits

Hawkeye Series

Solid state sensor ideal for point sensing

HK

HK_ _ _ _ _

Interface with AS-I

I/O module. Available with 1/2" NPT or quick connectors

Onyx Series VCTs *

Polycarbonate enclosure with integral pneumatic valve and solid state sensors in dual module

ON

ON96 [97] _ _ _ _ _ _

Select brass or stainless steel pneumatic valve

Prism Series

Polycarbonate enclosure with integral pneumatic valve and solid state sensors in dual module adaptable to diaphragm and angle valves

PM

PM96 [97] _ _ _ _ _ _ _

Available with NPT, compression fittings or quick connectors

*VCTs: Valve Communication Terminals

[For extended addressing use function option 97]

© 2004 S ton eL Cor po rat io n PU B # F L- 7 1 3 - 0 9 / 0 4