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D1073
- SIL 2 Temperature Signal Converter and Trip Amplifiers
G.M. International ISM0019-13
Start-up
Before powering the unit check that all wires are properly connected, particularly supply conductors and their polarity, input and output wires, also check that Intrinsically Safe conductors
and cable trays are segregated (no direct contacts with other non I.S. conductors) and identified either by color coding, preferably blue, or by marking. Check conductors for exposed
wires that could touch each other causing dangerous unwanted shorts. Turn on power, the “power on” green led must be lit, output signal should be corresponding to the input from the
sensor, alarm LED should reflect the input variable condition with respect to trip points setting. If possible change the transmitter output and check the corresponding Safe Area output.
Installation
D1073 is a temperature signal converter and trip amplifiers housed in a plastic enclosure suitable for installation on T35 DIN Rail according to EN50022.
D1073 unit can be mounted with any orientation over the entire ambient temperature range, see section “Installation in Cabinet” and "Installation of Electronic Equipments in Cabinet"
Instruction Manual D1000 series for detailed instructions.
D1073 temperature signal converter operates at low level measuring signals, for best performance, install it far from heat sources (heat dissipating equipment) and
wide temperature excursions, in example at the bottom of a cabinet with heat dissipating equipment, if any, at the top.
Electrical connection of conductors up to 2.5 mm² are accommodated by polarized plug-in removable screw terminal blocks which can be plugged in/out into a powered unit
without suffering or causing any damage
(for Zone 2 or Division 2 installations check the area to be nonhazardous before servicing)
.
The wiring cables have to be proportionate in base to the current and the length of the cable.
On the section “Function Diagram” and enclosure side a block diagram identifies all connections.
Identify the function and location of each connection terminal using the wiring diagram on the corresponding section, as an example:
Connect 24 Vdc power supply positive at terminal “3” and negative at terminal “4”.
Connect positive output of analog channel at terminal “1” and negative output at “2”.
Connect trip amplifier output of alarm A at terminal “5” and “6” and trip amplifier output of alarm B at terminal “7” and “8”.
For a thermocouple temperature input, connect thermocouple positive extension wire at terminal “15”, negative and shield (if any) at terminal “16”.
Make sure that compensating wires have the correct metal and thermal e.m.f. and are connected to the appropriate thermocouple terminal, note that a wrong compensating cable type or
a swapped connection is not immediately apparent but introduces a misleading measurement error that appears as a temperature drift. For a 3 wires thermoresistance temperature input
connect thermometer wire A at terminal “16”, B and C interconnected wires at “14” and “13”.
Note that for a correct line resistance compensation in case of 3 wire sensor, wire A and B should have the same resistance.
Intrinsically Safe conductors must be identified and segregated from non I.S. and wired in accordance to the relevant national/international installation standards
(e.g. EN/IEC60079-14 Electrical apparatus for explosive gas atmospheres - Part 14: Electrical installations in hazardous areas (other than mines), BS 5345 Pt4, VDE 165,
ANSI/ISA RP12.06.01 Installation of Intrinsically Safe System for Hazardous (Classified) Locations, National Electrical Code NEC ANSI/NFPA 70 Section 504 and 505,
Canadian Electrical Code CEC), make sure that conductors are well isolated from each other and do not produce any unintentional connection.
Connect SPST alarm contacts checking the load rating to be within the contact maximum rating (2 A, 250 V, 500 VA 80 W resistive load).
The enclosure provides, according to EN60529, an IP20 minimum degree of mechanical protection (or similar to NEMA Standard 250 type 1) for indoor installation, outdoor installation
requires an additional enclosure with higher degree of protection (i.e. IP54 to IP65 or NEMA type 12-13) consistent with the effective operating environment of the specific installation.
Units must be protected against dirt, dust, extreme mechanical (e.g. vibration, impact and shock) and thermal stress, and casual contacts.
If enclosure needs to be cleaned use only a cloth lightly moistened by a mixture of detergent in water.
Electrostatic Hazard: to avoid electrostatic hazard, the enclosure of D1073 must be cleaned only with a damp or antistatic cloth.
Any penetration of cleaning liquid must be avoided to prevent damage to the unit. Any unauthorized card modification must be avoided.
According to EN61010, D1073 series must be connected to SELV or SELV-E supplies.
Relay output contact must be connected to loads non exceeding category I, pollution degree I overvoltage limits.
Warning: de-energize main power source (turn off power supply voltage) and disconnect plug-in terminal blocks before opening the enclosure to avoid electrical shock
when connected to live hazardous potential.
