ENGINEERING SPECIFICATION
SYMCOM MODEL ISS-102C-M-LC Intrinsically Safe Switch
PART 1 GENERAL
1.1 REFERENCES
A. 30 CFR Part 18 – Mine Safety and Health Administration
B. ANSI/IEEE C62.41 – American National Standards Institute/Institute of Electrical & Electronics Engineers
1.2 WARRANTY
A. Manufacturer Warranty: The manufacturer shall guarantee the equipment to be free from material and workmanship defects
for a period of five years from the date of manufacture when installed and operated according to the manufacturer’s requirements.
PART 2 PRODUCTS
2.1 MANUFACTURERS
The equipment specified shall be the Model ISS-102C-M-LC, manufactured by SymCom, Inc.
2.2 DESCRIPTION
A. Regulatory Requirements:
a. MSHA has evaluated the device to comply with the requirements in CFR 30 18.68 for intrinsically safe devices. The
evaluation number is 18-ISA070001-0.
2.3 PERFORMANCE/DESIGN CRITERIA
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A . Capabilities and Features:
1. Inputs:
a. The equipment shall accept two control inputs from the hazardous area.
b . The equipment shall accept single-phase input voltage rated 120VAC.
2. Outputs:
a. The equipment shall include one Form C output relay. Contacts pilot duty rated 180VA@120VAC. Contacts general
purpose rated 5A@120VAC.
3. Functional Specifications:
a. The equipment shall provide the following functions: dual-channel differential/latching.
b. The equipment shall provide logic for pump-up or pump-down applications.
c. The equipment shall close the output contact when input channel #2 is activated.
d. The equipment shall open the output contact when input channel #1 and input channel #2 are inactivated.
e. The equipment shall include a debounce delay of 2 seconds.
f. The equipment shall include an input sensitivity threshold of 100k ohms.
g. The equipment shall include one LED indicating the relay state.
B. Intri sically Safe Requirements: n
C . Electromagnetic Compatibility:
1) The LED shall illuminate upon activation of the output relay.
1. The equipment shall have the following entity parameters:
a. Voc=16.8V
b. Isc=1.2mA
c. La=100mH
d. Ca=0.39µF
e. Po=
2. The equipment shall provide intrinsically safe circuit into the following locations:
a. Class I, Divisions 1 & 2, Groups A, B, C, & D
b. Class II, Divisions 1 & 2, Groups E, F & G
c . Class III
3. The equipment shall provide two inputs to the hazardous area.
1. The equipment shall be immune to electrostatic discharge per IEC 61000-4-2, Level 3, 6kV contact discharge and 8kV air
discharge.
2. The equipment shall be immune to electrical fast transient bursts per IEC 61000-4-4, Level 3, 4kV power supply port, 4kV
input/output ports.
3. The equipment’s power supply port shall be immune to electrical surges per IEC 61000-4-5, Level 4. Specified limits shall be
4kV line-to-line and line-to-ground.
4. The equipment shall be immune to radiated radio frequency emissions. Specified limits shall be 10V/m at 150 MHz.
Voc * Isc
ES-ISS-102C-M-LC_A1 04/22/2010
D. Dielectric Isolation: Equipment withstands an alternating current potential of 1000V plus twice the rated voltage of the equipment
for 1 minute without breakdown between uninsulated live parts and the enclosure with the contacts open and closed; between
terminals of opposite polarity with the contacts closed; and between uninsulated live parts of different circuits.
E. Enclosure Class of Protection: The equipment shall provide IEC IP20 (finger safe) protection.
F . Environmental Requirements:
1. The equipment shall operate continuously without derating in ambient temperatures of -40° to 55°C (-40° to 131°F).
2. The equipment shall operate continuously without derating in relative humidity of up to 95% non-condensing per IEC 68-2-3.
3. The equipment shall operate properly after storage in ambient temperatures of -40° to 80°C (-40° to 176°F).
G. Dimensions: The equipment dimensions shall not exceed 3.5” in height x 2.084” in width x 2.35” in depth.
H . Mounting:
1. The equipment shall be mountable on standard 35 mm DIN rail.
2. The equipment shall be surface mountable on a backplane.
End of Section
ES-ISS-102C-M-LC_A1 04/22/2010
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