Spectrum Controls 1746sc-OAP8I - Manual (Page 17)

Installation Instructions
Isolated-Circuit
Discrete Input and Output Modules
15
To wire field devices to your module, follow these steps:
1. Turn off power to the I/O chassis.
2. Optional: Remove the supplied 18-position red terminal block from the
module. To remove the terminal block, unscrew the two retaining screws at
the top and bottom of the terminal block, and pull the terminal block loose.
3. Wire field devices to your module as shown in the following wiring
diagrams, using a maximum wire size of 14 AWG and a maximum of two
wires per terminal. The recommended terminal screw torque is 7 to 9 in.-lb.
4. Install a wire tie in the slot below the terminal block and secure the wires.
CE Compliance Requirements
For installations requiring CE compliance, you must do the following:
• Observe the grounding guidelines provided in Allen-Bradley’s SLC 500
Installation and Operation Manual (Allen-Bradley publication 1747-NI002).
• Connect an E-GND terminal on the module directly to a rack mounting
bolt.
• Hard wire or permanently connect the PLC to the AC mains, or provide a
pin and sleeve (IEC 309) connector for connection to the AC mains.
This equipment is intended for use in over-voltage category II installations
(see IEC 364-4-443), where the rated mains supply voltage does not exceed
1000 Vac (50/60 Hz) or 1500 Vdc. If the input power is rated above these
levels, ensure that your system is isolated from the power main by an isola-
tion transformer (or equivalent over-voltage protection device) that has CE
approval or approval from a European test agency.
For the 1746c-IA8I, -IM8I, and -OAP8I, you must also protect against
electrical shock by installing the I/O chassis in an enclosure with an IP20 to
IP29 rating per IEC 529. The enclosure should have warning labels (hazard
symbol 417-IEC-5036) and/or a mechanical disconnect to minimize the risk
of accidental shock during maintenance. Use an enclosure that can only be
opened with a key or tool.