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Configuration and Use Manual 261
Relay Installation Series 3000 MenusDefaultsSpecifications – Model 3100
Appendix D
Installing Relays
D.1 About this appendix
This appendix explains how to install relay modules for the Series 3000 device. Relays are used to
connect the device’s discrete outputs to control devices.
D.2 Relay types
Two types of relay can be used with the Series 3000:
• The Model 3100 relay module supplied by Micro Motion. The Model 3100 contains three
solid-state relays.
• User-supplied relay or relay module compatible with the Series 3000 discrete outputs (see
Section D.5.1).
D.2.1 Power
The Model 3100 relay module is powered by the Series 3000 discrete outputs.
User-supplied relays can be powered by the Series 3000 discrete outputs if both of the following are
true:
• They are solid-state relays, and
• The relay input requirements are met by the discrete output characteristics (see Section D.5.1).
If either of these conditions is not true, user-supplied relays must be powered externally.
D.3 Hazardous area installations
If you are installing the relay or relay module in a hazardous area, review the information in this
section.
D.3.1 Model 3100 relays
ATEX
Model 3100 relay modules are suitable for installation in Zone 2, complying with ATEX Directive
(94/9/EC) for Group II, Category 3G, according to CENELEC standard prEN 50021:1998 and
marked as:
• EEx nV II T4
• KEMA 97 ATEX 4940 X
• Ambient temperature –20 to +60 °C (–4 to +140 °F)