8
D1093
- SIL 3 Relay Output Module with Line and Load diagnostics
G.M. International ISM0093-12
Installation
D1093 is a relay output modules housed in a plastic enclosure suitable for installation on T35 DIN Rail according to EN50022. D1093 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.
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 terminals “9” (or “11”) and negative at terminals “10” (or “12”), to drive the diagnostic circuits. Connect positive input at terminal “13” and
negative input at “14”. Connect fault indication relay output contact at terminal “15” and “16”. In case of NE loads, connect the NE loads at positive terminal “5” and negative terminal “6”.
In case of ND loads, connect the ND loads at positive terminal “7” and negative terminal “8”. If load requires DC power supply, connect supply line positive at terminals “1” (or “3”) and
negative at terminals “2” (or “4”). If load requires AC power supply, connect AC lines at terminals “1” (or “3”) and “2” (or “4”).
Installation and wiring must be in accordance to the relevant national or international installation standards (e.g. IEC/EN60079-14 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, and the Canadian Electrical Code CEC), make sure that conductors are well isolated from each other and
do not produce any unintentional connection.
Connect output relay contacts checking the load rating to be within the contact maximum rating (3 A, 250 Vac or 125 Vdc, 750 VA 120 W resistive load).
If necessary, to prevent relay contacts from damaging, an external protection (fuse or similar) should be connected.
A suitable protection must be chosen according to the relay breaking capacity diagram on data sheet.
Connect fault indication relay contacts checking the load rating to be within the contact maximum rating (3 A, 250 Vac or 125 Vdc, 750 VA 120 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 D1093 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.
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.
Start-up
Before powering the inputs of unit check that all wires are properly connected, also verifying their polarity. Check conductors for exposed wires that could touch each other causing
dangerous unwanted shorts. Turn on power supply for diagnostic circuits, the “power on” green led must be lit. Then enabling the input of channel, the “RELAY STATUS” yellow led must
be lit and load circuit must be energized because relay output contact is closed. Indeed, disabling the input of channel, the “RELAY STATUS” yellow led must be turned off and load
circuit must be de-energized because relay output contact is open. The “LINE FAULT” red led could only be lit when line breakage or load operating anomaly is detected by internal
diagnostic circuits, imposing to de-energize the SPST relay (open its contact) for fault indication.
