Optional Integral Relays; Mechanical; Enclosure - MSA SMC 5100-02-IT Operating Manual

1 Product Description

1.4.7 Optional Integral Relays

WARNING!
Relays are not to be used for safety critical functions.
Failure to follow these warnings can result in serious personal injury or death.
The optional relays are integral to the gas sensor module and are rated as SPDT, 30 VDC, 5 Amps* for the High Alarm and
Low Alarm relays and SPDT, 30 VDC, 0.25 Amp for the Trouble relay.
* HART option alarm relays are all SPDT, 30 VDC, 0.25 Amp
If the gas sensor module is provided with the optional relays, it will include Terminal P4 on the interface board (Section 3.6
Module Address Switch). Relay output connections are on P4.
1.5

Mechanical

The sensor module is comprised of the following three primary components:

1.5.1 Enclosure

Standard on the SMC 5100-02-IT is a cast aluminum electrical housing with three ¾" FNPT conduit hubs. The SMC 5100-
02-IT-S has a 316 Stainless Steel enclosure. Both enclosure covers have a viewing window. The design of the enclosure
allows 3-way mounting choices as shown below.
NOTE: Module installation must be such that it is mounted vertically with sensor pointing downward.
US SMC 5100-02-IT Gas Sensor 7