Dwyer Instruments MTL7706 Data sheet
Series
HAZARDOUS
AREA TERMINALS
SAFE AREA
TERMINAL
1/2
[12.70]
3-35/64
[90.09]
4-5/32
[105.57]
MTL7706/
7787
MTL7787
PROCESS CONTROL
Zener Barrier
Intrinsically Safe Barriers for Hazardous Locations
Intrinsically Safe
Barriers
The MTL7706/7787 is an intrinsically safe (IS) shunt-diode barrier that can
be used to communicate with and provide isolations for certain Dwyer
transmitters approved for use in hazardous areas. These barriers limit the
amount of energy allowed to pass into the hazardous area, which inhibit ignition
in flammable atmospheres.
Compatible Models: 637, 608, SBLTX, PBLTX, IS626
MTL Zener Barrier
MTL7706
MTL7706
MTL7706
Region (Authority)
USA (FM) (UL)
Canada (CSA)
UK (BASEEFA)
UK (BASEEFA)
Systems
FM
µF
Group
0.083
A & B
BASEEFA (ATEX)
Group
IIC
µF
0.083
MTL7706
Approval
UL for Class I; Div. 1 Groups A, B, C, D
CL II; Div. 1 Groups E, F, G; CL III Div. 1
FM for Class I, II, III; Div. 1 Groups B,
C, D, E, F, G
FM for Class I, II, III; Div. 1 Groups A,
B, C, D, E, F, G
FM
µF
0.083
µF
0.083
mH
3.05
mH
3.05
Approved For
AIS/I,II,III/1/Entity ABCDEFGSCI-942; NI/I/@/ABCD/T4
[I/0] AEx[ia]IIC-SCI-942
Entity; NI/1/2/IIC/T4;
Ta=140°F (60°C)
Class I, Div.2, Gps A, B, C, D;
Ex nA [iA] IIC T4
Class I, Xone 2, Aex nA IIC
T4
EEx ia IIC
EEx ia IIC
mH
4.2
mH
4.2
Group
A & B
BASEEFA (ATEX)
MTL7787
Group
IIC
Standard
3600, 3610 entity
3611, 3810
UL698
UL913
UL1604
CAN/CSA
E60070, IEC60079,
C22.2
EN 50014, EN 50020
EN 50039
Dwyer
Series
IS626
SBLTX
PBLTX
637
608
SPECIFICATIONS
®
Transmitter Voltage: 16.2 V at 20 mA with 250Ω load (negative w.r.t.
earth); 11.0 V at 20 mA with 500Ω load (negative w.r.t. earth).
Safe Area Output: 4 to 20 mA.
Load Resistance: 0 to 500 Ω.
Power Requirement: 20 to 35 VDC w.r.t. earth.
Accuracy: ±2 µA under all conditions.
LED Indicator: Green: Power indication.
Temperature Limits:
Operating: -4 to 140°F (-20 to 60°C);
Storage: -40 to 176°F (-40 to 80°C).
Humidity: 5 to 95% RH.
Terminals: Accommodate up to 2.5 mm2 stranded or single-core.
Safety Description: 28 µV, 300Ω, 93 mA.
Weight: 4.9 oz (140 g).
Agency Approvals: See table below.
ACCESSORY
A-360, Aluminum DIN Rail 1 m
Certificate/file no.
3010737
1345550
BAS01ATEX7217
Ex01E2219
CONTACT US | U.S. 219/879-8000 | U.K. (+44) (0)1494-461707 | A.U. (+61) (0) 2 4272 2055 | China +852-23181007
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