1640-IN-031-C-08 Page 77 of 104
MACO Series Controller Installation
Eurotherm/Barber-Colman
12. Installing & Wiring AC Input Boards
AC input boards have NOT been validated for conformance with the CE EMC
directive. Additional measures beyond those specified here may be needed in
order to demonstrate EMC compliance at the machine level. Proof of EMC
conformance lies with the machine manufacturer.
(Refer to Figures 12.0, 12.1, and 12.2) 18 gauge wire is recommended as a
minimum, but make certain to satisfy all local and national code requirements.
For Standard 24 Input (A-13900 or A-60089) Boards:
1.Connect L2 to Pin 1 of Connector P14. This connection provides a common for
all 24 of the opto-isolator input circuits (1 connection is required for all 24 inputs).
2.Connect each of the machine inputs to the board. There is a separate connection
for each of the 24 inputs (P14, Pins 2 - 9; and P15, Pins 1 - 16).
For High Density 48 Input Boards:
1.Connect L2 to Pin 1 of Connector P14 on each of the two boards. This connection
provides a common for all 24 of the opto-isolator input circuits of that board (two
connections are required for all 48 inputs).
2.Connect each of the machine inputs to the board. There is a separate connection
for each of the 48 inputs (P14, Pins 2 - 9 on each of the two boards; and P15, Pins
1 - 16 on each of the two boards).
AC Inputs Operating Specifications
Supply Voltage: Input Current:
100 to 240 Vac external 15mA @ nominal voltage
On Voltage: Indicator:
≥92 Vac LED per Input
Off Voltage: Isolation:
≤30 Vac Optically isolated as a group
For supply connections, use No. 18 AWG or
larger wires rated for at least 75°C (165°F).
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
Note: When counting boards in multi-rack
systems (for switch settings, RLD/screen pro-
gramming) count each control rack separately.
Class 2 Wiring must be separated a minimum of
1/4 inch from any Class 1 conductors.
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