M0201ABK_uc ERA® WCS and e-POI Subracks and Power Supply Unit Installation Guide
© June 2021 CommScope, Inc. Page 11
WCS-2 and WCS-4 Subrack Overview
WCS-2 AND WCS-4 SUBRACK OVERVIEW
The following sections provide information on the WCS-4 and WCS-2 Subracks, their Cards, Fan Trays and
Filter Modules.
WCS-2 and WCS-4 Subracks
The following sections provide information on the WCS-4 and WCS-2 Subracks (Figure 1). How Cards are
installed in the WCS-4 or WCS-2 Subrack, combined how the Subrack is configured in the ERA GUI determines
whether the Subrack is a CAN, WIN, or TEN.
• The WCS-4 (PN 7635442-xx) is four Rack Units (RUs) high and is typically used as a CAN or a WIN but
can also serve as a TEN. It is powered by the ERA AC to DC PSU subrack and power modules and can
provide Power over CAT6A to UAPs and Copper CAP Ls.
• The -48Vdc WCS-4 (7844068-xx) is four Rack Units (RUs) high and is typically used as a CAN or a WIN
but can also serve as a TEN. It is powered by an external -48 Vdc power supply. It is not capable of
supplying Power over CAT6A to UAPs or Copper CAP Ls.
• The WCS-2 (PN 7635443-xx) is two RUs high, and is typically used as a TEN, but can also serve as a CAN
or a WIN. It is powered by the ERA AC to DC PSU subrack and power modules and can provide Power over
CAT6A to UAPs and Copper CAP Ls.
• The -48Vdc WCS-2 (7844067-xx) is two RUs high, and is typically used as a TEN, but can also serve as a
CAN or a WIN. It is powered by an external -48 Vdc power supply. It is not capable of supplying Power
over CAT6A to UAPs or Copper CAP Ls.
• The CAN is the server-level control and primary signal distribution within an ERA system.
• A TEN is a secondary distribution point that connects to a CAN using Multi-Mode or Single-Mode fiber.
• An ERA system supports one CAN, and the CAN can support up to 32 TENs in a one TEN to one CAN
configuration. However, if you have two or more (up to four) fiber links between a particular TEN and its
CAN, this reduces the number of TENs that can connect to a CAN. For example, if you have two fiber links
for each TEN, then 16 TENs would be the maximum number of TENs that could be connected to the CAN.
• The WCS-4 and WCS-2 subracks and all subrack cards have an operating temperature range of
+5 to +40 °C (+41 to +104 °F).
For information on power consumption of ERA system components, refer to the ERA Solution Ordering
Guide.
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