Liebert 110V manual Potential free contacts

Chapter 1 - General Description User Manual

Network Power Switch

1.6 Potential free contacts

The Network Power Switch status can be checked with the 37-pin D-type connector, located on the rear end. This is a potential free contact, and gives following indications as shown in Table 1-1 –

Table 1-1

Status			Termination available of 37 pin D-type connector
		NC		NO	Common	NC	NO	Common
Overload		20		1	2	3	21	19
Priority		23		4	5	6	24	19
S1	Feed	7		25	26	27	8	19
S1	Healthy	28		9	10	11	29	19
S2	Healthy	12		30	31	32	13	19
S2	Feed	33		14	15	16	34	19
Unsynch		17		35	36	37	18	19

The pin details for this connector is shown in fig 1.6

Two potential free contacts indicating Source 1 and Source 2 Healthy conditions are taken from this 37 pin D type connector and terminated at rear terminal connectors, as shown in figure 1.7.

19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

			Pin Details
37 36 35 34 33	32 31 30	29 28 27 26 25 24 23 22 21 20	50	– S2 Healthy
			51	– S1 Healthy
			52	- Common
52	50	51

Fig 1.6 – Pin details for 37 pin D-type Connector

52 50 51

S1 Healthy

S2 Healthy

Common

I/p Line - 1

I/p Line - 2

Neutral - 1

Neutral - 2

O/p Line

POTENTIAL

FREE CONTACTS

Input Fuse 2

Input Fuse 1

Rear View

Fig 1.7 – Potential free contacts Connectors

Page 1-6