Heating Rate Controller · Technical reference

Reference Electrical Wiring R1.2

Two independent channels · Current R1.2 issue · Circuit paths and electrical functions

Distribution blocks

For block specifications, terminal allocations and mounting information, see the terminal distribution appendix.

Terminal allocations

All 48 allocated control, mains and protective-earth positions are maintained in the terminal allocation schedule. Individual wire routes are available in the connection sheets.

Complete circuit paths

Mains and 24 V

J1 inlet L/N/PE → X1-L/X1-N/X1-PE → Mean Well PS1 (24 V) and two separately selected Omron controller AC feeds. PS1 +Vo → X2-24 → S1-B and S2-B. PS1 −Vo → X2-0V.

Enable, each channel

S1-B/S2-B gated +24 V → X3-24G/X4-24G → Finder 13.61 L/+ and terminal 11, plus EAO C. Pressing EAO NO sends a pulse to Finder terminal 3. Finder output 14 → EN1/EN2 → Finder 62.31 coil A1, EAO LED+, Crydom A1/+3 and amber HL+.

Temperature demand

Type K (+) → Omron 6; Type K (−) → Omron 5. Omron output 1(+), 2(−) → Weidmüller input A1(+), A2(−). Crydom A2/−4 and HL− → DRV1/DRV2 → Weidmüller 13(+); Weidmüller 14(−) → common X2-0V.

External heater power

External DC+ → Lovato breaker 1→2 → Finder 62.31 contact 34 (+)→14 (−) → Crydom load +1→−2 → HEATER+. HEATER− goes straight to matching external DC−. The Finder contact 14 (−) and Crydom load −2 are on the switched POSITIVE path.

Functional note: CH1 and CH2 operate independently; they share the Mean Well 24 V supply. The amber ACTIVE lamp requires ENABLE ON and Omron SSR demand; it does not measure actual heater current. The Finder 13.61 is used as a momentary-enable step relay in RI mode.

Component specifications

Use the manufacturer component register for all part numbers, quantities and datasheets. Wiring designations correspond to the From → Via → To connection sheets.

Inspection requirements include PV-FUSE-01, an open protection discrepancy: neither Murata voltmeter has the manufacturer-specified external TB1 (+/−) input-wire fusing. The corrective-action notice, installation checks and risk assessment must be resolved before electrical approval.