Wiring Diagram

Analog Ccurrent Pparameters

Current Input Range Selection Table

Current input range selection and code value range
Range selection	Range	Code value range	Current input formula	Current output formula
0	Disable, indicating the channel is not enabled
1	4mA~20mA	0~65535	D=(65535/16)*I-16384	I=(D+16384)*16/65535
2 (Default)	0mA~20mA	0~65535	D=(65535/20)*I	I=(D*20)/65535
3	4mA~20mA	0~27648	D=(27648/16)*I-6912	I=((D+6912)*16)/27648
4	0mA~20mA	0~27648	D=(27648/20)*I	I=(D*20)/27648
5	-20mA~+20mA	0~65535	D=(65535/40)*(I+20)	I=(D*40)/65535-20

Note: “D” represents code value, and “I” represents current. The default range for analog current input terminal is 2: 0mA~20mA (0~65535).

Range 5: -20mA~+20mA (0~65535) is unique to the current input differential signal module.

Current Output Range Selection Table

Current output range selection and code value range
Range selection	Range	Code value range	Current input formula	Current output formula
0	Disable, indicating the channel is not enabled
1	4mA~20mA	0~65535	D=(65535/16*I)-16384	I=(D+16384)*16/65535
2 (Default)	0mA~20mA	0~65535	D=(65535/20)*I	I=(D*20)/65535
3	4mA~20mA	0~27648	D=(27648/16)*I-6912	I=((D+6912)*16)/27648
4	0mA~20mA	0~27648	D=(27648/20)*I	I=(D*20)/27648

Note: “D” represents the code value, and “I” represents the current. The default range for analog current output terminals is 2: 0mA~20mA (0~65535).

Current Input Code Value Table

Current	4mA~20mA	0mA~20mA	4mA~20mA	0mA~20mA	-20mA~+20mA
	0~65535	0~65535	0~27648	0~27648	0~65535
	Code value	Code value	Code value	Code value	Code value
-20	-	-	-	-	0
-15	-	-	-	-	8192
-10	-	-	-	-	16384
-9	-	-	-	-	18022
-8	-	-	-	-	19661
-7	-	-	-	-	21299
-6	-	-	-	-	22937
-5	-	-	-	-	24576
-4	-	-	-	-	26214
-3	-	-	-	-	27852
-2	-	-	-	-	29491
-1	-	-	-	-	31129
0	-	0	-	0	32768
1	-	3277	-	1382	34406
2	-	6554	-	2765	36044
3	-	9830	-	4147	37683
4	0	13107	0	5530	39321
5	4096	16384	1728	6912	40959
6	8192	19661	3456	8294	42598
7	12288	22937	5184	9677	44236
8	16384	26214	6912	11059	45875
9	20479	29491	8640	12442	47513
10	24575	32768	10368	13824	49151
11	28671	36044	12096	15206	50790
12	32767	39321	13824	16589	52428
13	36863	42598	15552	17971	54066
14	40959	45875	17280	19354	55705
15	45055	49151	19008	20736	57343
16	49151	52428	20736	22118	58982
17	53247	55705	22464	23501	60620
18	57343	58982	24192	24883	62258
19	61439	62258	25920	26266	63897
20	65535	65535	27648	27648	65535
20.19	-	-	28034	27917	-
20.24	-	-	28085	27986	-
Code value formula	Code value = 65535/16 * current - 16384	Code value = (65535/20) * current	Code value = (27648/16) * current - 6912	Code value = (27648/20) * current	Code value = (65535/40) * (current + 20)

Note: Range 5: -20mA~+20mA (0~65535) is unique to the current input differential signal module.

①When the current input terminal range is 4mA~20mA (0~65535), it supports overflow/underflow and overflow alarm functions. That is, when the channel input current is greater than 20.03mA, it displays the maximum code value 65535 is displayed and gives an alarm at the same time; When the input current of the input channel is less than 4mA, it displays the minimum code value 0.

② When the current input terminal range is selected from 0mA to 20mA (0 to 65535), it supports overflow/underflow and overflow alarm functions. That is, when the channel input current is greater than 20.03mA, it displays the maximum code value 65535 and gives an alarm at the same time.; When the input channel current is less than 0mA, it displays the minimum code value 0.

③ When the current input terminal range is 4mA~20mA (0~27648), it supports overflow overshoot, overflow/underflow, and overflow alarm functions. Overshoot means that when the channel input range exceeds the range and enters overshoot, it displays a normal calculated code values within 4mA~20.24mA. Overflow means that when the channel input current exceeds 20.24mA, it displays the maximum overshoot code value 28085 and gives an alarm. Underflow means that when the input channel current is below 4mA, it displays the minimum overshoot code value 0.

④ When the current input terminal range is 0mA~20mA (0~27648), it supports overflow overshoot, overflow/underflow, and overflow alarm functions. Overshoot means that when the channel input range exceeds the range, it displays a normal calculated code value within 0mA~20.24mA. Overflow means that when the channel input current exceeds 20.24mA, it displays the maximum overshoot code value 27986 and gives an alarm at the same time. Underflow means that when the input channel current is below 0mA, it displays the minimum overshoot code value 0.

⑤ When the current input terminal range is -20mA~+20mA (0~65535), it supports overflow/underflow and overflow alarm functions. That is, when the channel input current is greater than 20mA, the module displays the maximum code value 65535 and gives an alarm at the same time.; When the input channel input current is less than -20mA, the module displays the minimum code value 0.

Current Output Code Value Table

Current	4mA~20mA	0mA~20mA	4mA~20mA	0mA~20mA
	0~65535	0~65535	0~27648	0~27648
	Code value	Code value	Code value	Code value
0	-	0	-	0
1	-	3277	-	1382
2	-	6554	-	2765
3	-	9830	-	4147
4	0	13107	0	5530
5	4096	16384	1728	6912
6	8192	19661	3456	8294
7	12288	22937	5184	9677
8	16384	26214	6912	11059
9	20479	29491	8640	12442
10	24575	32768	10368	13824
11	28671	36044	12096	15206
12	32767	39321	13824	16589
13	36863	42598	15552	17971
14	40959	45875	17280	19354
15	45055	49151	19008	20736
16	49151	52428	20736	22118
17	53247	55705	22464	23501
18	57343	58982	24192	24883
19	61439	62258	25920	26266
20	65535	65535	27648	27648
22.81	-	-	32511	31538
23.52	-	-	-	32511
Code value formula	Code value = 65535/16 * current - 16384	Code value = (65535/20) * current	Code value = (27648/16) * current - 6912	Code value = (27648/20) * current

Note: ① When the current output terminal range is selected as 4mA~20mA (0~27648) and 0mA~20mA (0~27648), it supports overflow overshoot, overflow and overflow alarm functions. That’s, when the current output terminal range is selected as 4mA~20mA (0~27648) and the code value is set above 32511, all channels output 22.81mA current and give an alarm at the same time. When the current output terminal range is selected as 0mA~20mA (0~27648) and the code value is set above 32511, all channels output 23.52mA current and give an alarm at the same time.

SRR3238 | Analog 8 channel Current Input Module