Parker Products COMPAX-M /-S (L) manual NMD10, NMD20

Start-up manual COMPAX-M / -S

Activation of the internal ballast resistance for NMD20

Overvoltage limitation

Energy recuperated during braking is stored in the supply capacitors. The capacity and storable energy is:

NMD10/NMD20: 1100∝ F / 173 Ws

If the energy recuperated from braking causes overvoltage, then ballast resistances are engaged.

The internal ballast resistance is activated by a bridge between +LS and X5/1. In the NMD20 delivery status this bridge is fitted.

		L1 L2 L3 PE 24V					U	V W PE Brake
			+ -					PE + -
X1						X1
	X2
	PE
						X2
ext	-LS
	int
RB	RB	1
				X3			X3
	X5
		2
					X4		X5		X4

Maximum braking	Braking power	Duration		Cooling down time
power:	NMD10
	17 kW	<50 ms		≥	10s
	4.0 kW	<1s		≥	50s
	Without fan: 120W			unlimited
	With fan: 250W		unlimited
	NMD20
	9.5 kW	<50 ms		≥	10s
	2.5 kW	<1s		≥	50s
	Without fan: 120W			unlimited
	With fan: 200W		unlimited

External ballast resistances can be used with NMD20 (see Page 193).

Connecting the external ballast resistance

If the braking power of the internal ballast resistance is insufficient, an external ballast resistance can be connected.

The external ballast resistance is connected between +LS and X5/2. To do this, the bridge between +LS and X5/1 must be removed. The full braking power cannot be used with this bridge present.

			L1 L2 L3 PE 24V				U V W PE Brake
				+ -				PE + -
	X1					X1
		X2
		PE
						X2
		-LS
ext	ext
		int
RB	RB	RB	1
					X3		X3
		X5
			2

X4 X5 X4

Output X5 is protected from short circuits.

Thermal protection

An emergency stop is triggered at 85°C heat sink temperature, the ready contact is released and the red LED lights up.

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