GDS C1, Инструкция по эксплуатации

Страница: 27 / 56

22
Figure 3.1
3.1 INPUT / OUTPUT OPTIONAL PCB’s
Telephone style RJ11 connections are used to add optional 8 channel analog and digital
I/O. A screen appears briefly after power up indicating what options are connected and
for which channels. This information is also available from the
Diagnostics Mode
described in Section 4.
A N A L O G
P R E S S N E X T K E Y T O E X I T
I N P U T
1- 8
F OU N D
A N A L OG
I N P U T
9 - 16
F OU N D
A N A L OG
OU T P U T
1- 8
F OU N D
A N A L OG
OU T P U T
9 - 16
F O U N D
A L A R M2
R e l a y
1- 8
F O U N D
A L A R M2
I N P U T
9 - 16
F OU N D
Figure 3.2
3.1.1 OPTIONAL ANALOG INPUT PCB # 10-0158
Many transmitters or sensors have analog output signals and the 12 bit Analog Input
PCB , shown in Figure 3.3, is available to accept these. TB1, with 24 positions, offers 3
terminals per channel for distributing power and receiving analog inputs. These are EXC
and HI / LO inputs. TB2, with only two positions, is for connecting the power supply for
powering external transmitters. Precision 100 ohm resistors (R1 – R8) between each
channel’s
IN LO and IN HI terminals are socketed termination resistors for 4-20mA
inputs. These may be removed if voltage inputs are to be applied.