6.1 Input/Output
This section gives a summary of the I/O available in different models:-
Digital Inputs
Current Transformer Input
Relay/Logic Outputs.
The availability of these is shown in the following table:-
|
Name |
Availability |
Typical Functions |
Beacon (lit when active) |
Terminal
|
||
|
|
816 |
808 |
804 |
|
|
|
|
OP1 |
Relay
|
Relay Logic |
Relay
|
Heat Cool Alarm Events (timer status) |
OP1 |
1A, 1B |
|
OP2 |
Relay
|
Relay
|
Relay
|
Heat Cool Alarm Events (timer status) |
OP2 |
2A, 2B |
|
OP3
|
Not available in 816 |
Relay Analogue |
Relay Analogue |
Heat Cool Alarm Events (timer status) Retransmission (Setpoint, Process value, Output) |
OP3 |
3A, 3B |
|
OP4 |
Relay (changeover) |
Relay (changeover) |
Relay (changeover) |
Heat Cool Alarm or FM alarm Events (timer status) |
OP4 |
4A, 4B, 4C |
|
DI1 |
Contact input |
Contact input |
Contact input |
Alarm acknowledge Setpoint 2 select Front keypad disable (Keylock) Timer reset Timer run Timer run/reset Timer hold Select manual Select standby mode |
|
C, LA |
|
DI2 |
Not available in 816 |
Contact input |
Contact input |
Alarm acknowledge Setpoint 2 select Front keypad disable (Keylock) Timer reset Timer run Timer run/reset Timer hold Select manual Select standby mode |
|
LB, LC |
|
CT |
X |
X |
X |
Current measurement |
|
C, CT |
|
Digital Comms |
X |
X |
X |
EIA485 (RS485) |
|
HD, HE, HF |