Spectrum Controls 1771sc-IMI16 - Manual (Page 4)

1. Turn off power to the I/O chassis.
2. Place the module in the plastic tracks on the top and bottom of the slot that
guides the module into position.
3. Do not force the module into its backplane connector. Apply firm, even
pressure on the module to seat it properly.
4. Snap the chassis latch over the top of the module to secure its position.
5. Connect the wiring arm to the module, as detailed below.
Connecting Wiring to the Input Module
Connections to the input module are made to the 40-terminal field wiring arm
(cat. no. 1771-WN) shipped with the module (Figure 2). Attach the wiring arm
to the pivot bar on the bottom of the I/O chassis. The wiring arm pivots upward
and connects with the module so you can install or remove the module without
disconnecting the wires.
Connect your input wiring to the field wiring arm as shown in Figure 2. Each
input channel has a positive and negative terminal. Connect only one wire to
a terminal. When multiple connections to a terminal are required, use an auxiliary
terminal strip.
CE Compliance Requirements
For installations requiring CE compliance, you must do the following:
• Use a minimum wire size of 16 AWG.
• Observe the grounding guidelines provided in Allen-Bradley’s 1771 Universal
I/O Chassis Installation Data Sheet.
• Hard wire or permanently connect the PLC to the power main, or provide
a pin and sleeve (IEC 309) connector for connection to the power main.
This equipment is intended for use in over-voltage category II installation (see
IEC 364-4-443), where the rated mains supply voltage does not exceed 1 kVac
(50/60 Hz) or 1.5 kVdc. If the input power is rated above these levels, ensure
that your system is isolated from the power main by an isolation transformer
(or equivalent over-voltage device) that has CE approval or approval from a
European test agency.
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.
Installation Data
AC/DC (220/240 V) Input Module
Cat. No. 1771sc-IMI16
4