10

s NOTICE

(1) Capacitive load

If the load is capacitive, an inrush current to charge the load with poses a problem. In this case, a current-limiting

resistor or surge suppressor coil is connected in series to the contacts to suppress the peak current.

(2) Clinching terminals

To secure the relay temporarily to a printed circuit board for soldering, particular terminals are allowed to be clinched

within a particular angle. other terminals, never clinched.

The terminal numbers and the angle for clinching of each series are as follows.

1) No.4 and no.5 terminals to 45

° maximum for H bridge type of EN2 and EP2

2) No.5 and no.9 terminals to 45

° maximum for separate type of EN2 and EP2

3) No.4 and no.5 terminals to 45

° maximum for EP1

4) No.1, 4 and no.5 terminals to 45

° maximum for MR301

(3) Drive circuit

Since the coil of a relay has an inductive impedance, a counter electromotive force is generated when the circuit

is opened. This voltage may damage the relay driver IC. Therefore, a diode is connected in parallel with the coil,

as shown in figure 1.

100 ms min.

Tr1

Tr2

M

Figure 1

MOTOR

Tr1

off

off

on

off

off

on

Tr2

STOP

FORWARD

REVERSE

(4) Typical application for EN2/EP2 relays (H bridge type)