1640-IN-031-C-08
Page 62 of 104
Eurotherm/Barber-Colman
MACO Series Controller Installation
If both Class 1 and Class 2 Input/Output Boards are present, it may be necessary to bundle wires and
route straight down through the wiring trough in order to meet minimum spacing requirements.
Yes
No
For supply connections, use No. 18 AWG or
larger wires rated for at least 75°C (165°F).
Note: When counting boards in multi-rack
systems (for switch settings, RLD/screen pro-
gramming) count each control rack separately.
L
O
A
D
L1
L2
In order to insure that triac outputs will fully turn on, the load
must draw a minimum of 50 mA AC rms current when
conducting. If a load is suspected or known to require less
than 50 mA, one of the resistors below should be used. The
resistor is meant to be wired in parallel with the load and will
serve to increase load current above the 50 mA minimum.
Class 2 Wiring must be separated a minimum of
1/4 inch from any Class 1 conductors.
Caution:
Resistor gets "hot" when powered.
Keep away from wiring, case, etc.
Kit Number 71-934-000 (120 Vac)
2k Ω, 10 W, leaded, wire-wound resistor.
Kit Number 71-934-100 (240 Vac)
4k Ω, 20 W, leaded, wire-wound resistor.
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