MDC Manual 1109KB - Red Lion Controls
MDC Manual 1109KB - Red Lion Controls
MDC Manual 1109KB - Red Lion Controls
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WIRING CONNECTIONS<br />
When wiring the unit, remove the terminal block and use the numbers on<br />
the top label to identify the position number with the proper function. All<br />
conductors should meet voltage and current ratings for each terminal. Also<br />
cabling should conform to appropriate standards of good installation, local<br />
codes and regulations. It is recommended that power supplied to the unit be<br />
protected by a fuse or circuit breaker. Strip the wire, leaving approximately<br />
1 4" bare wire exposed (stranded wires should be tinned with solder). Insert the<br />
wire into the terminal and tighten down the screw until the wire is clamped in<br />
tightly. Each terminal can accept up to two 18-gage wires. After the terminal<br />
block is wired, install it in the proper location at the rear of the unit. Wire each<br />
terminal block in this manner.<br />
TERMINAL CONNECTIONS<br />
-33-<br />
AC POWER WIRING<br />
The AC power is connected to the bottom terminals, TBA1&2,marked AC<br />
PWR. The voltage selector switch, located at the side of the unit, is used to select<br />
the proper voltage. The switch is a slide movement type and can be set using a<br />
small screwdriver. If the switch is towards the front of the unit, it is set for 115<br />
VAC input. If the switch is towards the rear of the unit, it is set for 230 VAC<br />
input. The switch is in the 230 VAC position when shipped from the factory.<br />
Note: Before applying power to the unit make sure the AC power switch is set for<br />
the proper voltage setting.<br />
To reduce the chance of noise spikes entering the AC line and affecting the<br />
unit, the AC power should be relatively “clean” and within the specified<br />
±10% variation limit. Connecting power from heavily loaded circuits or<br />
circuits that also power loads that cycle on and off, (contactors, relays,<br />
motors, etc.) should be avoided.<br />
DC OUTPUT POWER WIRING<br />
The DC Output power connections are bottom terminals TBA 3&4<br />
marked +12 VDC and common. This source is capable of supplying 12 VDC<br />
�25% at 100 mA to power input sensors or other external devices. These<br />
terminals CANNOT be used to supply DC power to the <strong>MDC</strong>.
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