| Power isolation and servicing |
Disconnect the supply before installation, maintenance or modification and prevent inadvertent reconnection. Faults must be examined by a qualified technician; do not open the case yourself. |
| Controlled installation environment |
Use a controlled, dry and well-ventilated pollution degree 2 environment. Keep foreign objects and dripping liquid out; avoid high moisture, water and fire sources. Do not touch the unit during operation or shortly after disconnection. |
| Circuit separation |
Do not connect the input and output sides together. Follow the exact model terminal assignments and connected equipment requirements. |
| Copper conductor selection |
Use copper conductors and fully secure all strands. The manual lists AWG 18/16/14/12/10 with equipment-current guidance of 7/10/15/25/32 A and cross-sections of 0.8/1.3/2.1/2.5/4 mm². With 4–6 connected wires, apply the stated 80% current factor. This is an ampacity guide, not a terminal acceptance range; verify conductor capacity, actual terminals and the intended current. |
| Selecting the number of power supplies |
Check both aggregate AC input current and primary storage capacitance. The manual method uses the smaller current-based or capacitance-based unit count, multiplies it by 0.9 and rounds down. Its 19-unit SDR-120-24 example is not a general maximum; use the connected model data and the current ICL specification. |
| Three-phase applications |
Use the manufacturer circuit diagrams and qualified system design. In a grid without neutral, the voltage between each pair of live wires must not exceed 264 VAC. This does not create a higher-voltage three-phase rating. |
| Mounting orientation and clearances |
Mount vertically on TS35/7.5 or TS35/15 DIN rail with input terminals below and output terminals above. Inverted, horizontal and table-top installation are not allowed. Keep 5 mm clear on each side, 40 mm above and 20 mm below, plus 10–15 cm from an adjacent heat source. Verify the rail latch is locked. |
| R terminal preparation |
Use conductors rated at least 80°C, such as UL1007. The recommended strip length is 6 mm and screwdriver is a 3 mm slotted type. |
| Terminal tightening torque |
5.1 kgf-cm (4.43 lb-in) for both input and output terminals. |
| Installation temperature limit |
The dedicated manual limits ICL-28R/28L installation to 60°C. The product specification lists an operating range to 70°C and a horizontal reference curve at 80% load at 70°C. These do not establish unconditional installation above 60°C; obtain manufacturer confirmation for that use. |
| Curve and mounting distinction |
The catalogue curve is labeled HORIZONTAL, but the dedicated R installation instructions require vertical DIN-rail mounting. The curve label does not authorize horizontal installation. |
| Secure conductors and contacts |
Insert every strand of stranded wire into the terminal and secure the screw connection. Do not overload one contact; where equipment has multiple output contacts, follow the manual’s requirement to wire each contact. |
| DIN rail locking sequence |
Tilt slightly rearwards, fit over the top-hat rail, slide down to the stop, press the bottom to lock, then gently check that the unit is locked. |
