X1-L Mains live L
| Port | Conductor / endpoint |
|---|---|
| L.1 | J1 switched/fused L |
| L.2 | PS1 C1 (L) |
| L.3 | S1-A:13 |
| L.4 | S2-A:13 |
4 occupied / 6 positions · 2 spare
Heating Rate Controller · Electrical Reference R1.2
Terminal distribution
Terminal block selection, conductor assignments and mounting · reference arrangement
Block selection and capacity
Each PTFIX distributor is one electrical potential with six or twelve independently accessible conductor positions. Separate distributors are required for L, N, 24 V, 0 V and each switched circuit. The protective-earth group uses a dedicated WAGO 2002-1407 ground terminal.
11Distribution groups
48Allocated terminations
70Available positions
22Unassigned positions
| Reference | Circuit / purpose | Manufacturer and selected part | Qty | Used / total | Spare |
|---|---|---|---|---|---|
| X1-L | Mains live L | Phoenix PTFIX 6X2,5 NS35 BN · 3273010 | 1 | 4 / 6 | 2 |
| X1-N | Mains neutral N | Phoenix PTFIX 6X2,5 NS35 BU · 3273002 | 1 | 4 / 6 | 2 |
| X1-PE | Protective earth | WAGO 2002-1407 PE | 1 | 4 / 4 | 0 |
| X2-24 | Common +24 V | Phoenix PTFIX 6X2,5 NS35 RD · 3273004 | 1 | 3 / 6 | 3 |
| X2-0V | Common 0 V | Phoenix PTFIX 12X2,5 NS35 GY · 3273022 | 1 | 9 / 12 | 3 |
| X3-24G | CH1 gated +24 V | Phoenix PTFIX 6X2,5 NS35 RD · 3273004 | 1 | 4 / 6 | 2 |
| X3-EN1 | CH1 enabled +24 V | Phoenix PTFIX 6X2,5 NS35 OG · 3273018 | 1 | 5 / 6 | 1 |
| X3-DRV1 | CH1 switched drive return | Phoenix PTFIX 6X2,5 NS35 VT · 3273016 | 1 | 3 / 6 | 3 |
| X4-24G | CH2 gated +24 V | Phoenix PTFIX 6X2,5 NS35 RD · 3273004 | 1 | 4 / 6 | 2 |
| X4-EN2 | CH2 enabled +24 V | Phoenix PTFIX 6X2,5 NS35 OG · 3273018 | 1 | 5 / 6 | 1 |
| X4-DRV2 | CH2 switched drive return | Phoenix PTFIX 6X2,5 NS35 VT · 3273016 | 1 | 3 / 6 | 3 |
Purchase summary: Phoenix Contact PTFIX 6X2,5-NS35: brown ×1, blue ×1, red ×3, orange ×2, violet ×2; PTFIX 12X2,5-NS35 gray ×1; WAGO 2002-1407 PE ×1. This is the quantity for one complete two-channel reference assembly; distributor packaging and minimum-order quantities may be greater.
The current terminal allocation covers the listed 24 V controls, mains and PE circuits. External heater DC runs through its own rated breakers, contacts, SSRs and panel connectors; do not route a 15 A heater feed through these control-distribution groups.
DIN-rail mounting and conductor insertion
Mounting selection
The selected PTFIX …-NS35 variants are supplied ready for 35 mm top-hat DIN rail, NS 35/7.5 or NS 35/15. No separate PTFIX-to-DIN adapter is required for the selected ready-to-mount part numbers.
The WAGO 2002-1407 ground terminal is also specified for 35 × 7.5 or 35 × 15 DIN rail. Verify the rail, PE contact, mounting stability and bonding of the complete assembly.
Use the lengthwise -NS35A family only if the bill of materials and physical layout are revised to match; mounting orientations are not interchangeable part numbers.
Wiring practice
PTFIX 2.5 family: push-in termination, nominal cross-section 2.5 mm², rigid/flexible conductor range per selected manufacturer data. Phoenix specifies 8–10 mm stripping length; ferruled flexible wires must match the manufacturer's permitted ferrule and conductor range.
Use one conductor per marked port. Keep the mains, protective earth and low-voltage circuits separated and properly enclosed. Leave safe room around each connector for insertion, withdrawal, wire bend radius and inspection.
No conductive bridging between separate distribution groups. Do not use PTFIX current ratings to justify the external 15 A heater circuit or reduce protective-device requirements.
Manufacturer references: Phoenix Contact PTFIX catalogue · PTFIX 12-way technical data · WAGO 2002-1407 technical data.
Terminal allocation · 48 connections
Each port has one assigned conductor. The same reference codes are used on the electrical drawings and on the From–Via–To sheets. The remaining positions are unassigned.
X1-N Mains neutral N
| Port | Conductor / endpoint |
|---|---|
| N.1 | J1 switched N |
| N.2 | PS1 C2 (N) |
| N.3 | E1:12 (N) |
| N.4 | E2:12 (N) |
4 occupied / 6 positions · 2 spare
X1-PE Protective earth
| Port | Conductor / endpoint |
|---|---|
| PE.1 | J1 PE |
| PE.2 | PS1 C3 (PE) |
| PE.3 | cabinet chassis bonding |
| PE.4 | flexible door bonding |
4 occupied / 4 positions · 0 spare
X2-24 Common +24 V
| Port | Conductor / endpoint |
|---|---|
| 24.1 | PS1 +Vo |
| 24.2 | S1-B:23 |
| 24.3 | S2-B:23 |
3 occupied / 6 positions · 3 spare
X2-0V Common 0 V
| Port | Conductor / endpoint |
|---|---|
| 0V.1 | PS1 −Vo |
| 0V.2 | K1 N/− |
| 0V.3 | SK3:A2 |
| 0V.4 | SB1 LED− |
| 0V.5 | W1:14(−) |
| 0V.6 | K2 N/− |
| 0V.7 | SK4:A2 |
| 0V.8 | SB2 LED− |
| 0V.9 | W2:14(−) |
9 occupied / 12 positions · 3 spare
X3-24G CH1 gated +24 V
| Port | Conductor / endpoint |
|---|---|
| 1 | S1-B:24 |
| 2 | K1 L/+ |
| 3 | K1:11 |
| 4 | SB1:C |
4 occupied / 6 positions · 2 spare
X3-EN1 CH1 enabled +24 V
| Port | Conductor / endpoint |
|---|---|
| 1 | K1:14 |
| 2 | SK3:A1 |
| 3 | SB1 LED+ |
| 4 | SSR1 A1/+3 |
| 5 | HL1+ |
5 occupied / 6 positions · 1 spare
X3-DRV1 CH1 switched drive return
| Port | Conductor / endpoint |
|---|---|
| 1 | W1:13(+) |
| 2 | SSR1 A2/−4 |
| 3 | HL1− |
3 occupied / 6 positions · 3 spare
X4-24G CH2 gated +24 V
| Port | Conductor / endpoint |
|---|---|
| 1 | S2-B:24 |
| 2 | K2 L/+ |
| 3 | K2:11 |
| 4 | SB2:C |
4 occupied / 6 positions · 2 spare
X4-EN2 CH2 enabled +24 V
| Port | Conductor / endpoint |
|---|---|
| 1 | K2:14 |
| 2 | SK4:A1 |
| 3 | SB2 LED+ |
| 4 | SSR2 A1/+3 |
| 5 | HL2+ |
5 occupied / 6 positions · 1 spare
X4-DRV2 CH2 switched drive return
| Port | Conductor / endpoint |
|---|---|
| 1 | W2:13(+) |
| 2 | SSR2 A2/−4 |
| 3 | HL2− |
3 occupied / 6 positions · 3 spare
ACTIVE indicator path: Finder K1 terminal 14 → X3-EN1 → HL1 positive; Finder K2 terminal 14 → X4-EN2 → HL2 positive. The LED negative returns via X3-DRV1/X4-DRV2 and its Weidmüller demand interface. The enable distribution nets are not permanent +24 V.
DC input voltmeters · PV1 and PV2
Each Murata DMR20-10-DCM-R-C meter measures its channel's external DC supply input at TB1. The meter has an internal self-resetting fuse. The manufacturer also requires external 0.25 A / 300 V time-delay protection of supply wiring connected to TB1 (+) and TB1 (−). The exact DC-rated fuse/holder topology, placements and count require documented competent engineering selection.
Confirmed as fitted: neither PV1 nor PV2 has external meter input fuses. The two meter branches are omitted from the 48-terminal PTFIX allocations and the 70-route table; neither record is a complete as-built voltmeter connection reference. PV-FUSE-01 corrective action and inspection record →
Murata meter installation datasheet → · Equipment risk assessment →
Assembly materials
| Material | Specification / selection | Application |
|---|---|---|
| DIN rail | 35 mm top-hat, 7.5 or 15 mm height, securely mounted | PTFIX-NS35, WAGO PE terminal and other rail components |
| Terminal/distributor markings | Durable group and port identification consistent with X1–X4 schedules | Identifies circuits, positions and conductor destinations |
| Conductor and ferrules | Correct insulation/temperature/current ratings, compatible size and strip length | Secure push-in conductor termination; ferrules where specified |
| Segregation and cable management | Insulation barriers, ducting, cable supports, suitable clearances | Separates mains, PE, 24 V controls and independent external DC leads |
| PE rail and enclosure bonding | Correct PE terminal and verified protective conductor continuity | J1, PS1, cabinet chassis and flexible door bond |
| Meter input wiring | Murata installation specification: external 0.25 A / 300 V time-delay supply-wire fusing | Required protection, not installed in the reported configuration |
| External heater DC protection | Suitable source protection, 15 A duty verification, DC-rated switching and connectors | Not a PTFIX control-distribution circuit |
The named PTFIX …-NS35 variants already include their mounting arrangement; do not add separate PTFIX-NS35 adapters to the purchase list unless using plain blocks. Allow for any rail end-stops and accessories required by the final rail layout and manufacturer's installation requirements.
Inspection and commissioning checks
- Verify block part numbers, mounting, secure retention, markings, insulation, conductor insertion and all 48 terminations against the schedule.
- Verify mains L/N segregation, protective-earth continuity, cabinet/door bonds, conductor sizing and fault protection.
- Confirm X2-0V is permanent control return; X3-DRV1/X4-DRV2 are demand-switched outputs, not permanent DC 0 V.
- Verify Finder 13.61 K1/K2 terminal 14 is the supply to the matching ACTIVE LED positive; confirm lamp truth table for both channels.
- Verify external DC source polarity and switching direction, DC protection, Finder 62.31/socket suitability at maximum duty and Crydom thermal derating.
- PV-FUSE-01 open: the external fuse protection for both meter TB1 (+/−) circuits must be selected, fitted and verified, with the real DC topology and DC fault-interrupt ratings checked and evidence recorded before live-use approval. Inspection record.
- Verify Omron RESET removes heat demand, safe power-restoration behaviour, and all required emergency isolation and temperature protection.
- Before operation, complete the equipment risk assessment, operating procedure release checks and any specimen-specific controls.
These checks apply to installation and maintenance. This reference schedule does not constitute evidence of a completed independent electrical inspection.
As-built differences record
Record approved differences between the terminal allocation reference and the physical enclosure after inspection. Keep this record separate from the electrical connection schedule.
| # | Reference / terminal | Specified arrangement | Installed arrangement | Reviewed by / date |
|---|---|---|---|---|
| 01 | ||||
| 02 | ||||
| 03 | ||||
| 04 | ||||
| 05 | ||||
| 06 | ||||
| 07 | ||||
| 08 |
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