Emerson M21 ユーザーズマニュアル
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MAN-0076 Rev 05 Millennium II
December 07, 2012
Net Safety Monitoring Inc
December 07, 2012
Net Safety Monitoring Inc
1.2.2 Transmitter electronics module and Relay options
The transmitter electronics module may be equipped with 4 electromechanical relays or 4 solid-state relays which are
mounted to the main terminal board via plastic standoffs. Relay boards are field replaceable by simply unlocking the
plastic standoffs with a small flat head screw driver. Remove relay board after unlocking standoffs, insert the
replacement relay board, and then lock the plastic standoff with the screw driver. See Figure 3
description.
Warning
Before wiring or replacement of relay boards, ensure that the power to transmitter is switched off.
Do not open the transmitter enclosure in a classified area.
Warning
Avoid touching electronic components, as they are susceptible to electrostatic discharge (ESD).
Refer to Appendix A, “Electrostatic Sensitive Device (ESD)”.
Figure 3:
Board assembly diagram