Power Consumption Data
SBC/Boards: Metro = 20W is tipical consumption and 40W is maximum. WP188 = 5W tipical.
Radios: XR5 = 6W per radio, WLM54AG/CM9 = 1.8W WLM54AGP23 = 2.5W
0.35A PSU's (48V) are rated for 4 low-power radios, no more than that, and since Metro's are not sold together with PSU's (I think at least Valemount never sold them like that), you must be using PSU's meant for WP188's.
Case Scenarios:
Max consumption for METRO: 4 x High power XR5: 17W+(4 x 6.0W) = 41W 4 x High power WLM: 17W+(4 x 2.5W) = 27W 4 x Low power CM9: 17W+(4 x 1.8W) = 24W
Max consumption for WP188: 2 x XR5 + 2x CM9: 5W+(2 x 6W) + (2 x 1.8W) = 20.6W 2 x WLMSAG + 2x CM9: 5W+(2 x 2.5W) + (2 x 1.8W) = 13.6W 4 x High power WLM: 5W+(4 x 2.5W) = 15W 4 x Low power CM9: 5W+(4 x 1.8W) = 12.2W