Kollmorgen S700 series digital servo amplifier

Temperature control: If the ambient temperature exceeds 40 ℃, forced air cooling (wind speed ≥ 2m/s) should be added. When the temperature of the heat sink exceeds 80 ℃, the amplifier will overheat and shut down (fault F01). It is recommended to use the S724 model with a cold plate (heat dissipation area ≥ 0.1m ²).

Fan installation

S701-S712 fan: Pinch the long side of the fan housing and pull it down. When installing, align it with the green connector and push it into the buckle lock.

S724 fan: Pinch the short side of the fan housing and pull it down. When installing, make sure the connector is aligned with the socket and press it until the buckle is fixed. The fan has no independent wiring and can be powered through the internal connector.

（2） Electrical wiring specifications

Wiring safety and sequence

Power off operation, ensure capacitor discharge (≥ 8 minutes after power off, measure DC bus voltage<60V), all power cables (motor/power) and control cables (feedback/I/O) need to be separately shielded, and the shielding layer should be grounded 360 ° through the amplifier front panel or metal connector (low impedance).

The distance between power cables and control cables should be ≥ 200mm to avoid cross interference; When the length of the motor cable exceeds 25m, Kollmorgen 3YL/3YLN motor choke coils should be connected in series (such as S70102 with 4 × 1mm ² cable) to reduce leakage current and EMI interference.

Core interface definition

Power interface (X0): S7xx0 model L1/L2/L3 connected to three-phase live wire, PE connected to protective ground; S7xx6 single-phase connection L1/N, three-phase connection L1/L2/L3, PE wire section ≥ 10mm ² or dual PE wiring, external slow melting fuse needs to be configured (such as S70102 with 6A/600V, S72402 with 30A/600V).

Motor interface (X9): U2/V2/W2 is connected to the three-phase winding of the motor, PE is connected to the motor casing, BRAKE+/BRAKE - is connected to a 24V brake (only with a brake motor), the brake current is ≤ 2A, and a separate freewheeling component (such as a varistor) needs to be configured.

Safety interface (X4A/X4B): STO1 Enable (X4B/6) and STO2 Enable (X4A/3) are connected to external safety circuits (24V/33-40mA). In dual channel configuration, safety relay outputs need to be connected separately to ensure SIL CL3 level. When not in use, they need to be short circuited to+24V.

Feedback interface (X1/X2): X2 is the rotary transformer interface (9-pin SubD), R1/R2 is the reference signal, S1/S2/S3/S4 is the sine/cosine signal; X1 is an encoder interface (15 pin SubD) that supports protocols such as EnDat/BiSS/HIPERFACE. The FBTYPE parameter needs to be selected based on the feedback type (e.g. EnDat 2.2 is set to 32/34).

Typical wiring scheme

Three phase power supply (S70602): L1/L2/L3 connected to 3 × 400VAC, PE connected to cabinet ground, X0 terminal tightened with a torque of 0.7-0.8Nm, power supply side connected in series with 10A slow melting fuse (UL class RK5) to avoid damage from surge current.

Motor and brake (with brake motor): X9 terminal U2/V2/W2 is connected to the motor winding, BRAKE+is connected to 24V power supply, BRAKE - is connected to amplifier X9/1, the brake control wire uses shielded twisted pair (such as 2 × 0.75mm ²), the shielding layer is grounded at both ends, and additional mechanical braking is required for vertical axis applications (brake is only used for parking and frequent braking is prohibited).

STO safety circuit (dual channel): STO1 Enable (X4B/6) is connected to the normally closed contact of safety relay K1, STO2 Enable (X4A/3) is connected to the normally closed contact of safety relay K2, and the relay coil is controlled by the emergency stop button. When the emergency stop is triggered, the STO signal is disconnected, and the amplifier cuts off the motor torque (fault F27).

Security Features and System Configuration

（1） STO security function (core security feature)

Function definition and level

STO (Safe Torque Off) achieves no torque output of the motor by blocking the triggering pulse of the power transistor, which complies with EN 60204-1 stop category 0 (uncontrolled shutdown). The single channel configuration (STO1/STO2 series) reaches SIL CL2/PLd, and the dual channel+cycle test (safety controller monitoring feedback signal) reaches SIL CL3/PLe. The PFH_D is 1.04E-09 1/h, and the MTBF is 20 years.

Wiring and Testing

Single channel wiring: STO1 Enable and STO2 Enable are connected in series and then connected to a safety relay output. The reference ground is XGND (X4B/5), with an input voltage of 20-30VDC and a current of 33-40mA. When disconnected, the amplifier displays "- S -" and the motor has no torque.

Functional testing:

When the motor is stationary (the enable signal is valid), disconnect the STO input, the amplifier should immediately cut off the torque, display fault F27, and the BTB/RTO contact (X3B/14-15) is disconnected.

Reset STO input, use Fault Reset input (X3A/18) or software reset to restore the amplifier to normal state, with a test cycle of ≤ 8 hours (SIL CL3 requirement).

（2） System configuration (software and hardware settings)