Basler BE1-CDS220, Instruction Manual

Page: 291 / 476

BE1-CDS220 Installation 12-9
RELAY CONNECTIONS
Relay connections are dependent on the application and logic scheme used. Not all inputs or outputs may
be used in a given installation. Incorrect wiring may result in damage to the relay. Be sure to check the
model and style number against the options listed in Figure 1-8, Style Number Identification Chart, in
Section 1, General Information, before connecting and energizing a particular relay.
Terminal Blocks
There are two sizes of terminal blocks used on the BE1-CDS220. Terminals B1 through B16 are for
current inputs and use 8-32 pan head (Phillips) screws with a lock washer. The remaining terminals use
6-32 pan head (Phillips) screws with no washer. See Figure 12-10 to locate these terminals.
The lock washers on Terminals B1 through B16 are integral parts of the current input circuit wiring and
should not be removed. Without the lock washer, the 8-32 screw may bottom out and prevent a good
mechanical connection with the terminal block.
Maximum wire lug width accommodated by Terminals B1 through B16 is 0.344 inches (8.6 mm).
Maximum wire lug width accommodated by the other terminals is 0.320 inches (8.1 mm). Figure 12-10 is
a rear view of the BE1-CDS220 case showing the terminal connections.
Figure 12-10. Horizontal or Vertical Rear View Terminal Connections
Typical AC and DC Connections
Typical external AC and DC connections for the BE1-CDS220 are shown in Figures 12-11 and 12-12.
Except as noted above, connections should be made with minimum wire size of 14 AWG. Be sure to use
the correct input power for the power supply specified.
NOTE
The relay should be hard-wired to earth ground with no smaller than 12 AWG
copper wire attached to the rear ground terminal of the relay case. When the
relay is configured in a system with other protective devices, a separate ground
bus lead is recommended for each relay.