IMD 100 Integration manual 4189360015 Rev. G
Electrical HW connections and requirements
Page 50 of 243
Terminal no.
Terminal text
Description
2
SCI 1.2
Safety-chain input channel 1 (-)
3
SCI 2.1
Safety-chain input channel 2 (+)
4
SCI 2.2
Safety-chain input channel 2 (-)
5
RO 1.1
Additional relay output contact 1
6
RO 1.2
Additional relay output contact 2
7
SCR 1.1
Safety-chain relay channel 1 contact 1
8
SCR 1.2
Safety-chain relay channel 1 contact 2
9
SCR 2.1
Safety-chain relay channel 2 contact 1
10
SCR 2.2
Safety-chain relay channel 2 contact 2
11
+24 V
+ 24 V DC supply for all outputs
12
DO 1
Digital output 1
13
DO 2
Digital output 2
14
DO 3
Digital output 3
15
DO 4
Digital output 4
16
DO 5
Digital output 5
17
DO 6
Digital output 6
18
DO 7
Digital output 7
19
DO 8
Digital output 8, it is recommended to use this output for
the Fan + (red wire). See also section
20
0 V
Ground for all outputs, also used for Fan - (black wire)
5.5.2.1 Safety I/O
In order to be able to implement a safety-chain according to ISO 13849, two safety-chain relays (SCR)
and two safety-chain inputs (SCI) are implemented in the IMD. See
IMD 100 function description
manual for detailed description of how the safety I/O is implemented and functions.
Safety-chain inputs (SCI) have the same HW specifications as all other digital inputs specified in
section
Safety-chain output (SCR) are relay outputs, protected with a PTC multi-fuse (0.5 A). If the current
exceeds the fuse value, the fuse will heat up and disconnect the output. When the fuse is cooled
down, it will automatically reconnect the output.
The safety-chain outputs relay contacts have the following HW specifications:
Maximum voltage
30 V DC
Maximum current
0.25 A DC
Attention
The digital outputs are galvanically isolated from the IMD circuit by optocouplers. Ground
and +24 VDC from the external circuit must be connected to terminal 11 and 20.