Honeywell DCP552 Mark II Manuel D’Utilisation

●

• The inputs of the 

unit are provided with a built-in power supply

(open voltage type, 8.5V DC). Always use no-voltage contacts
externally.

• For the no-voltage contacts, use gold contacts or other relays that switch

on small currents. Other types of relay contacts may not switch. Use
contacts that have ample margin over the minimum switching capacity
with respect to the current and open voltage ratings of contacts provided
on the 

.

• If using semiconductors (open collectors, etc.) as no-voltage contacts,

use one that maintains a potential of no more than 2V across the
contacts when actuated, and a leakage current of no more than 0.1mA
when shut off.

• The digital inputs (remote switch inputs) of all SDC40 and SDC10 series

units can be connected in parallel. If connecting them in parallel to
another instrument, carefully check the requirements of the other
instrument before proceeding.

• Do not connect SDC20/21, SDC30/31 series in parallel. Doing so may

cause the external switch input to malfunction.

• Common terminals (12) and (41) of the external switch input are

connected internally.

1

2

3

4

13 14 15 16 12

SW1   SW2   SW3   SW4  SW5   SW6  SW7  SW8

25 26 29 30 33 34 37 38 41

SW9 SW10 SW11 SW12 SW13 SW14 SW15 SW16

: With BCD

1         2        4       8      10     20

RUN

HOLD

RESET

ADV

CH1
cancel

CH2
cancel

8.5V DC

8.5V DC

Internal
circuit