REO Controller I/O Cheat Sheet
This is a quick reference guide for connecting inputs and outputs to the REO brand of controllers. In most cases
the controller face plate must be removed in order to access the internal terminal strip. See the associated
manual for additional information.
REO MFS Series (268 3 Amp, 268, 268XL, and 268XXL) IP54 Enclosed
Internal Status Relay (Dry contact)
o Terminal # 22 & 23 (Normally Open)
o Terminal # 21 & 22 (Normally Closed)
Enable Input (12 – 24 V DC) – See Code 003 for inverting
o Terminal # 5 - Positive (+)
o Terminal # 4 - Negative (-)
PNP – Sensor (Track Control)
o An external cable can be connected to X4
Pin 1: +24V DC, Pin 2: Empty, Pin 3: Ground, Pin 4: Input
o Internal Connection
Terminal # 1 – Ground
Terminal # 2 – Input
Terminal # 3 - +24V DC
External Set Point – Requires input changes on Code 003
o Terminal # 7 – Negative (-) [0 to 10V or 0(4) to 20 mA/Potentiometer]
o Terminal # 8 – Positive (+) [0 to 10V or 0(4) to 20 mA/Potentiometer]
o Note: Potentiometer 10 KΩ, Note: R=500 ohm external
Air Valve Output (24V DC, 150 mA) – 12 and 16 Amp only
o Terminal # 35: Ground, Terminal # 36: Air Valve +24V, Terminal # 37: Time out +24V
Inhibit Codes
o Code 117 – Hides Menus
Setting = 1 (Menus cannot be accessed, except for feed rate)
Setting = 0 (All menus can be accessed)
o Code 137 – Lock Feed Rate
Setting = 0 (Feed rate can be adjusted)
Setting = 1 (Feed rate cannot be adjusted)
Maintenance Check – Code 040
o It is advised to check and note the First setting on Code 040 for maintenance purposes. This
setting is the actual coil current in percentage of the nominal current.
Example: Display = 50.0 (on a 12 Amp nominal controller, the system is utilizing 6 Amps)
o If this setting is noted and compared to future settings, any significant change (greater than
10%) would indicate a potential issue with the feed system.
Moorfeed Corporation
4162 North EMS Blvd
Greenfield, IN 46140
Phone: 317.545.7171
Fax: 317.375.1906
www.moorfeed.com
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