MSA Senscient ELDS 1000 series, Руководство по эксплуатации

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Installation Design & Engineering
Senscient ELDS™
Rev 15 47
GB
y. For US/Canada (CSA (UL) the apparatus incorporates an integral threaded conduit entry (3/4”-
14TPI). Install a conduit seal within 18 inches. In order to maintain ingress protection seal
threads with a suitable material e.g. a non-hardening thread sealant or PTFE tape etc. (see
Control Drawing in section 9).
3.3.2 Electrical Connections: Terminal Compartment
The Transmitter and Receiver units of the ELDS 1000 / 2000 Series OPGD both feature an
integral terminal compartment which is to be used for making all electrical connections to the units.
The terminal compartment is a flameproof design, and in order to comply with the applicable
hazardous area protection standards, must be entered by a cable or conduit fitted with a suitable
flameproof cable gland or conduit entry.
Prior to opening the terminal compartment it is recommended to slide forward the sunshade and
remove the M6 X 12 screw together with the anti-tamper device using an M6 Allen key (supplied).
Retain all components, and refit when installation is complete. Access to the electrical connections
inside the terminal compartment can then be gained by unscrewing the threaded rear cover.
A 12mm Allen key wrench (supplied) can be used to loosen the rear cover.
3.3.3 Receiver Electrical Connections
The terminal compartment of the Receiver of an ELDS 1000 / 2000 Series OPGD contains a 12-
way terminal block, by means of which most electrical connections to the unit can be made. The
terminal block is capable of accepting wires of up to 2.5mm2 or compatible bootlace ferrules. The
terminal numbers, connection labels and proper functions of the connections available via the
Receiver terminal block are detailed in the table below:
Terminal No. Connection Label Function
1 +24V Positive connection to system power supply.
2 0V Negative or zero volt connection to system power supply.
3 LOCAL +24V Local connection to +24V to configure 4-20 (1) as source.
4 4-20 (1) SNK Sink + connection for 4-20 (1)
5 4-20 (1) SRC Source - connection for 4-20 (1)
6 LOCAL 0V Local connection to 0V to configure 4-20 (1) as sink.
7 LOCAL +24V Local connection to +24V to configure 4-20 (2) as source.
8 4-20 (2) SNK Sink + connection for 4-20 (2)
9 4-20 (2) SRC Source - connection for 4-20 (2)
10 LOCAL 0V Local connection to 0V to configure 4-20 (1) as sink.
11 RS485 (A) Connection to RS485 (A) (Also Modbus output.)
12 RS485 (B) Connection to RS485 (B) (Also Modbus output.)
Conductors and insulation should be rated for operation at temperatures ≥ 85°C.