Models ER-420-AC, ER-420-DC & ER-420-LP
APPENDIX A: TECHNICAL SPECIFICATIONS
General
Display
Type High intensity reflective numeric and alphanumeric LCD, UV-resistant.
Digits Seven 17 mm (0.67") and eleven 8 mm (0.31"). Various symbols and measuring units.
Refresh rate User definable: 8 to 30/sec
Enclosures
General Control Keys GRP (glassfiber-reinforced polyamide) enclosure with polycarbonate window, silicone and
EPDM gaskets.
UV-stabilized and flame retardant material.
Three industrial micro-switch keys. UV-stabilized silicone keypad.
Field/wall-mount enclosures
Classification Drilling
Dimensions: 130 x 120 x 75 mm (5.10" x 4.72" x 2.95") LxHxD. IP67 / NEMA4X
Three 3/4" holes.
Operating Temperature
Operational –30…80° C (–22…178° F).
Power Supply
ER-420-DC 24V AC / DC + 10%. Power consumption maximum is 0.5 Watt.
ER-420-AC 115…230V AC + 10%. Power consumption maximum is 0.5 Watt.
ER-420-LP Output loop powered: 8…30V DC. Power consumption maximum is 0.5 Watt.
Models DC/AC The total consumption of the sensors, backlight and outputs may not exceed 400 mA @ 24V.
Sensor Excitation
ER-420-LP 3.2V DC for pulse signals.
OTE:N This is not a real sensor supply. It is suitable only for pulse sensors—like reed
switches—with a very low power consumption.
ER-420 AC/DC 3.2, 8.2, 12 and 24V DC. Maximum is 400 mA @2 4V DC.
Terminal Connections
Type Removable plug-in terminal strip. Wire maximum is 1.5 mm
2
and 2.5 mm
2
Data Protection
Type EEPROM backup of all setting. Backup of running totals every minute.
Data retention is at least 10 years.
Passcode Configuration settings can be passcode protected.
Environment
Electromagnetic compatibility Compliant ref: EN 61326 (1997), EN 61010-1 (1993)
Page 34 March 2013
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