There are two ways to upgrade an existing control: replace the whole control with the M-2979 cabinet, or fit an M-2400 series adapter inside the existing cabinet. The M-2979 cabinet holds the M-7679 and includes the interface connections and external communications needed to replace three-phase or independent-phase recloser, switch or sectionalizer control cabinets. The quick reference guide lists compatible reclosers from Eaton Cooper (NOVA and traditional types), Tavrida OSM, Siemens SDR, ABB Elastimold MVR and ABB GridShield, as well as Yaskawa load break switches. Each is matched to a specific control cable pin count. The recloser relay blocking functions include 27 BSVS, 27Vz1 and 25 sync check.
manufactured_byc1 drafted · lead Beckwith Electric proposed
sec=h1 h=f3fe9d886bcbsec=h5 h=36a767fa0789review note: support check: partial - Passages say 'Beckwith Electric' M-2979 and M-2400 products and show M-7679 R-PAC, but never explicitly state Beckwith Electric makes the M-7679 (implied by branding only).
compatible_withc2 drafted · lead Beckwith M-2979 control cabinet proposed
The M-2979 cabinet houses the M-7679 R-PAC for complete replacement of switch, sectionalizer or recloser controls.
sec=h3 h=9db135e729c7sec=h5 h=36a767fa0789sec=h6 h=7ce99b295f5bsec=h8 h=7ce99b295f5bc3 verified · fact Beckwith M-2400 series adapters proposed
Adapters allow retrofit of some popular controls inside the existing cabinet.
sec=h5 h=36a767fa0789sec=h6 h=7ce99b295f5bsec=h8 h=7ce99b295f5bverified by: review-workflowverified on: 2026-10-24
c4 drafted · lead Tavrida OSM recloser proposed
OSM AI_2 and AI_4 reclosers with 42-pin control cable listed in the compatibility table.
tbl=1.r6 h=667e788f8801c5 drafted · lead Siemens SDR recloser proposed
Listed with a 40-pin control cable.
tbl=1.r5 h=8697db1ace61c6 drafted · lead Elastimold MVR recloser proposed
ABB (Thomas & Betts) Elastimold MVR recloser listed with a 32-pin control cable.
tbl=1.r2 h=01e73402ab21c7 verified · fact ABB GridShield recloser proposed
Both 250 Vdc and 155 Vdc GridShield versions appear in the compatibility guide.
sec=h3 h=9db135e729c7fig=16 h=f695ce255d6dverified by: review-workflowverified on: 2026-10-24
c8 drafted · lead Yaskawa load break switch proposed
Listed among compatible brands for the cabinet replacement solution.
sec=h3 h=9db135e729c7implementsc9 drafted · lead Synchronism check proposed
25 Sync is listed among the recloser blocking functions, together with 27 BSVS and 27Vz1 undervoltage blocking.